entity.py
author Sylvain Thénault <sylvain.thenault@logilab.fr>
Wed, 16 Sep 2009 14:28:58 +0200
branch3.5
changeset 3241 1a6f7a0e7dbd
parent 3212 07d11bacfefe
child 3245 7ef021ac8dec
permissions -rw-r--r--
unrelated_rql now considers relation's add perm
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"""Base class for entity objects manipulated in clients
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:organization: Logilab
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:copyright: 2001-2009 LOGILAB S.A. (Paris, FRANCE), license is LGPL v2.
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:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr
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:license: GNU Lesser General Public License, v2.1 - http://www.gnu.org/licenses
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"""
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__docformat__ = "restructuredtext en"
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from warnings import warn
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0
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from logilab.common import interface
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from logilab.common.compat import all
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from logilab.common.decorators import cached
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from logilab.common.deprecation import deprecated
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from logilab.mtconverter import TransformData, TransformError, xml_escape
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from rql import parse
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from rql.utils import rqlvar_maker
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from cubicweb import Unauthorized
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from cubicweb.rset import ResultSet
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from cubicweb.selectors import yes
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from cubicweb.appobject import AppObject
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from cubicweb.rqlrewrite import RQLRewriter
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from cubicweb.schema import RQLVocabularyConstraint, RQLConstraint, bw_normalize_etype
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from cubicweb.common.uilib import printable_value, soup2xhtml
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from cubicweb.common.mixins import MI_REL_TRIGGERS
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from cubicweb.common.mttransforms import ENGINE
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_marker = object()
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def greater_card(rschema, subjtypes, objtypes, index):
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    for subjtype in subjtypes:
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        for objtype in objtypes:
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            card = rschema.rproperty(subjtype, objtype, 'cardinality')[index]
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            if card in '+*':
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                return card
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    return '1'
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_MODE_TAGS = set(('link', 'create'))
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_CATEGORY_TAGS = set(('primary', 'secondary', 'generic', 'generated')) # , 'metadata'))
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try:
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    from cubicweb.web import formwidgets, uicfg
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    def _dispatch_rtags(tags, rtype, role, stype, otype):
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        for tag in tags:
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            if tag in _MODE_TAGS:
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                uicfg.actionbox_appearsin_addmenu.tag_relation(
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                    (stype, rtype, otype, role), tag == 'create')
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            elif tag in _CATEGORY_TAGS:
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                uicfg.autoform_section.tag_relation((stype, rtype, otype, role),
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                                                    tag)
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            elif tag == 'inlineview':
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                uicfg.autoform_is_inlined.tag_relation((stype, rtype, otype, role), True)
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            else:
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                raise ValueError(tag)
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except ImportError:
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    _dispatch_rtags = None
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def _get_etype(bases, classdict):
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    try:
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        return classdict['id']
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    except KeyError:
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        for base in bases:
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            etype = getattr(base, 'id', None)
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            if etype and etype != 'Any':
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                return etype
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def _get_defs(attr, name, bases, classdict):
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    try:
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        yield name, classdict.pop(attr)
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    except KeyError:
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        for base in bases:
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            try:
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                value = getattr(base, attr)
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                delattr(base, attr)
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                yield base.__name__, value
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            except AttributeError:
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                continue
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class _metaentity(type):
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    """this metaclass sets the relation tags on the entity class
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    and deals with the `widgets` attribute
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    """
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    def __new__(mcs, name, bases, classdict):
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        # collect baseclass' rtags
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        etype = _get_etype(bases, classdict)
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        if etype and _dispatch_rtags is not None:
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            for name, rtags in _get_defs('__rtags__', name, bases, classdict):
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                warn('%s: __rtags__ is deprecated' % name, DeprecationWarning)
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                for relation, tags in rtags.iteritems():
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                    # tags must become an iterable
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                    if isinstance(tags, basestring):
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                        tags = (tags,)
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                    # relation must become a 3-uple (rtype, targettype, role)
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                    if isinstance(relation, basestring):
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                        _dispatch_rtags(tags, relation, 'subject', etype, '*')
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                        _dispatch_rtags(tags, relation, 'object', '*', etype)
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                    elif len(relation) == 1: # useful ?
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                        _dispatch_rtags(tags, relation[0], 'subject', etype, '*')
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                        _dispatch_rtags(tags, relation[0], 'object', '*', etype)
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                    elif len(relation) == 2:
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                        rtype, ttype = relation
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                        ttype = bw_normalize_etype(ttype) # XXX bw compat
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                        _dispatch_rtags(tags, rtype, 'subject', etype, ttype)
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                        _dispatch_rtags(tags, rtype, 'object', ttype, etype)
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                    elif len(relation) == 3:
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                        rtype, ttype, role = relation
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                        ttype = bw_normalize_etype(ttype)
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                        if role == 'subject':
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                            _dispatch_rtags(tags, rtype, 'subject', etype, ttype)
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                        else:
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                            _dispatch_rtags(tags, rtype, 'object', ttype, etype)
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                    else:
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                        raise ValueError('bad rtag definition (%r)' % (relation,))
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            for name, widgets in _get_defs('widgets', name, bases, classdict):
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                warn('%s: widgets is deprecated' % name, DeprecationWarning)
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                for rtype, wdgname in widgets.iteritems():
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                    if wdgname in ('URLWidget', 'EmbededURLWidget', 'RawDynamicComboBoxWidget'):
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                        warn('%s widget is deprecated' % wdgname, DeprecationWarning)
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                        continue
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                    if wdgname == 'StringWidget':
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                        wdgname = 'TextInput'
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                    widget = getattr(formwidgets, wdgname)
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                    assert hasattr(widget, 'render')
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                    uicfg.autoform_field_kwargs.tag_subject_of(
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                        (etype, rtype, '*'), {'widget': widget})
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        return super(_metaentity, mcs).__new__(mcs, name, bases, classdict)
0
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class Entity(AppObject, dict):
0
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    """an entity instance has e_schema automagically set on
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    the class and instances has access to their issuing cursor.
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0
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    A property is set for each attribute and relation on each entity's type
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    class. Becare that among attributes, 'eid' is *NEITHER* stored in the
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    dict containment (which acts as a cache for other attributes dynamically
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    fetched)
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    :type e_schema: `cubicweb.schema.EntitySchema`
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    :ivar e_schema: the entity's schema
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    :type rest_var: str
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    :cvar rest_var: indicates which attribute should be used to build REST urls
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                    If None is specified, the first non-meta attribute will
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                    be used
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0
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    :type skip_copy_for: list
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    :cvar skip_copy_for: a list of relations that should be skipped when copying
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                         this kind of entity. Note that some relations such
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                         as composite relations or relations that have '?1' as object
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                         cardinality
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    """
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    __metaclass__ = _metaentity
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    __registry__ = 'etypes'
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    __select__ = yes()
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   163
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    # class attributes that must be set in class definition
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    id = None
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    rest_attr = None
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    fetch_attrs = None
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    skip_copy_for = ('in_state',)
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    # class attributes set automatically at registration time
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    e_schema = None
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0
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    MODE_TAGS = set(('link', 'create'))
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    CATEGORY_TAGS = set(('primary', 'secondary', 'generic', 'generated')) # , 'metadata'))
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    @classmethod
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    def __initialize__(cls):
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        """initialize a specific entity class by adding descriptors to access
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        entity type's attributes and relations
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        """
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        etype = cls.id
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        assert etype != 'Any', etype
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        cls.e_schema = eschema = cls.schema.eschema(etype)
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        for rschema, _ in eschema.attribute_definitions():
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            if rschema.type == 'eid':
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                continue
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            setattr(cls, rschema.type, Attribute(rschema.type))
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        mixins = []
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        for rschema, _, role in eschema.relation_definitions():
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   188
            if (rschema, role) in MI_REL_TRIGGERS:
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                mixin = MI_REL_TRIGGERS[(rschema, role)]
0
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                if not (issubclass(cls, mixin) or mixin in mixins): # already mixed ?
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                    mixins.append(mixin)
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                for iface in getattr(mixin, '__implements__', ()):
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                    if not interface.implements(cls, iface):
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                        interface.extend(cls, iface)
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   195
            if role == 'subject':
0
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                setattr(cls, rschema.type, SubjectRelation(rschema))
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            else:
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                attr = 'reverse_%s' % rschema.type
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                setattr(cls, attr, ObjectRelation(rschema))
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        if mixins:
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            cls.__bases__ = tuple(mixins + [p for p in cls.__bases__ if not p is object])
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            cls.debug('plugged %s mixins on %s', mixins, etype)
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   203
0
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    @classmethod
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    def fetch_rql(cls, user, restriction=None, fetchattrs=None, mainvar='X',
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                  settype=True, ordermethod='fetch_order'):
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        """return a rql to fetch all entities of the class type"""
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        restrictions = restriction or []
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        if settype:
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            restrictions.append('%s is %s' % (mainvar, cls.id))
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        if fetchattrs is None:
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            fetchattrs = cls.fetch_attrs
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        selection = [mainvar]
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        orderby = []
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        # start from 26 to avoid possible conflicts with X
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        varmaker = rqlvar_maker(index=26)
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        cls._fetch_restrictions(mainvar, varmaker, fetchattrs, selection,
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                                orderby, restrictions, user, ordermethod)
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        rql = 'Any %s' % ','.join(selection)
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        if orderby:
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            rql +=  ' ORDERBY %s' % ','.join(orderby)
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        rql += ' WHERE %s' % ', '.join(restrictions)
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   223
        return rql
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   224
0
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   225
    @classmethod
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    def _fetch_restrictions(cls, mainvar, varmaker, fetchattrs,
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                            selection, orderby, restrictions, user,
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                            ordermethod='fetch_order', visited=None):
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   229
        eschema = cls.e_schema
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        if visited is None:
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            visited = set((eschema.type,))
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        elif eschema.type in visited:
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            # avoid infinite recursion
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            return
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        else:
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            visited.add(eschema.type)
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        _fetchattrs = []
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        for attr in fetchattrs:
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            try:
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                rschema = eschema.subject_relation(attr)
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   241
            except KeyError:
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                cls.warning('skipping fetch_attr %s defined in %s (not found in schema)',
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                            attr, cls.id)
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                continue
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            if not user.matching_groups(rschema.get_groups('read')):
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                continue
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            var = varmaker.next()
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            selection.append(var)
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            restriction = '%s %s %s' % (mainvar, attr, var)
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            restrictions.append(restriction)
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            if not rschema.is_final():
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                # XXX this does not handle several destination types
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                desttype = rschema.objects(eschema.type)[0]
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                card = rschema.rproperty(eschema, desttype, 'cardinality')[0]
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                if card not in '?1':
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                    cls.warning('bad relation %s specified in fetch attrs for %s',
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                                 attr, cls)
0
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                    selection.pop()
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                    restrictions.pop()
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                    continue
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                # XXX we need outer join in case the relation is not mandatory
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   262
                # (card == '?')  *or if the entity is being added*, since in
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   263
                # that case the relation may still be missing. As we miss this
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   264
                # later information here, systematically add it.
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                restrictions[-1] += '?'
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                destcls = cls.vreg['etypes'].etype_class(desttype)
0
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                destcls._fetch_restrictions(var, varmaker, destcls.fetch_attrs,
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                                            selection, orderby, restrictions,
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                                            user, ordermethod, visited=visited)
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            orderterm = getattr(cls, ordermethod)(attr, var)
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            if orderterm:
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                orderby.append(orderterm)
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        return selection, orderby, restrictions
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    @classmethod
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    @cached
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    def parent_classes(cls):
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        parents = [cls.vreg['etypes'].etype_class(e.type)
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                   for e in cls.e_schema.ancestors()]
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        parents.append(cls.vreg['etypes'].etype_class('Any'))
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        return parents
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   283
    @classmethod
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    @cached
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    def _rest_attr_info(cls):
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        mainattr, needcheck = 'eid', True
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        if cls.rest_attr:
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            mainattr = cls.rest_attr
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            needcheck = not cls.e_schema.has_unique_values(mainattr)
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        else:
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            for rschema in cls.e_schema.subject_relations():
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                if rschema.is_final() and rschema != 'eid' and cls.e_schema.has_unique_values(rschema):
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                    mainattr = str(rschema)
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   294
                    needcheck = False
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   295
                    break
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   296
        if mainattr == 'eid':
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   297
            needcheck = False
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   298
        return mainattr, needcheck
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   299
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   300
    def __init__(self, req, rset=None, row=None, col=0):
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        AppObject.__init__(self, req, rset, row, col)
0
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        dict.__init__(self)
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   303
        self._related_cache = {}
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        if rset is not None:
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            self.eid = rset[row][col]
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        else:
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            self.eid = None
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   308
        self._is_saved = True
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0
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    def __repr__(self):
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   311
        return '<Entity %s %s %s at %s>' % (
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   312
            self.e_schema, self.eid, self.keys(), id(self))
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    def __nonzero__(self):
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        return True
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    def __hash__(self):
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   318
        return id(self)
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   319
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   320
    def __cmp__(self, other):
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diff changeset
   321
        raise NotImplementedError('comparison not implemented for %s' % self.__class__)
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diff changeset
   322
0
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   323
    def pre_add_hook(self):
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        """hook called by the repository before doing anything to add the entity
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   325
        (before_add entity hooks have not been called yet). This give the
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   326
        occasion to do weird stuff such as autocast (File -> Image for instance).
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   327
0
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   328
        This method must return the actual entity to be added.
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   329
        """
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   330
        return self
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   331
0
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   332
    def set_eid(self, eid):
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   333
        self.eid = self['eid'] = eid
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   334
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   335
    def has_eid(self):
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   336
        """return True if the entity has an attributed eid (False
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   337
        meaning that the entity has to be created
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   338
        """
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   339
        try:
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   340
            int(self.eid)
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   341
            return True
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   342
        except (ValueError, TypeError):
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   343
            return False
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    def is_saved(self):
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   346
        """during entity creation, there is some time during which the entity
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   347
        has an eid attributed though it's not saved (eg during before_add_entity
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diff changeset
   348
        hooks). You can use this method to ensure the entity has an eid *and* is
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   349
        saved in its source.
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   350
        """
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diff changeset
   351
        return self.has_eid() and self._is_saved
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diff changeset
   352
0
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diff changeset
   353
    @cached
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   354
    def metainformation(self):
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   355
        res = dict(zip(('type', 'source', 'extid'), self.req.describe(self.eid)))
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diff changeset
   356
        res['source'] = self.req.source_defs()[res['source']]
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   357
        return res
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   358
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diff changeset
   359
    def clear_local_perm_cache(self, action):
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diff changeset
   360
        for rqlexpr in self.e_schema.get_rqlexprs(action):
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diff changeset
   361
            self.req.local_perm_cache.pop((rqlexpr.eid, (('x', self.eid),)), None)
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diff changeset
   362
0
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    def check_perm(self, action):
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   364
        self.e_schema.check_perm(self.req, action, self.eid)
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   365
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    def has_perm(self, action):
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        return self.e_schema.has_perm(self.req, action, self.eid)
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   369
    def view(self, vid, __registry='views', **kwargs):
0
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        """shortcut to apply a view on this entity"""
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        return self.vreg[__registry].render(vid, self.req, rset=self.rset,
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                                            row=self.row, col=self.col, **kwargs)
0
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diff changeset
   374
    def absolute_url(self, *args, **kwargs):
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   375
        """return an absolute url to view this entity"""
2059
af33833d7571 absolute_url / build_url refactoring to avoid potential name clash
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2058
diff changeset
   376
        # use *args since we don't want first argument to be "anonymous" to
af33833d7571 absolute_url / build_url refactoring to avoid potential name clash
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2058
diff changeset
   377
        # avoid potential clash with kwargs
af33833d7571 absolute_url / build_url refactoring to avoid potential name clash
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2058
diff changeset
   378
        if args:
af33833d7571 absolute_url / build_url refactoring to avoid potential name clash
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2058
diff changeset
   379
            assert len(args) == 1, 'only 0 or 1 non-named-argument expected'
af33833d7571 absolute_url / build_url refactoring to avoid potential name clash
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2058
diff changeset
   380
            method = args[0]
af33833d7571 absolute_url / build_url refactoring to avoid potential name clash
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2058
diff changeset
   381
        else:
af33833d7571 absolute_url / build_url refactoring to avoid potential name clash
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2058
diff changeset
   382
            method = None
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   383
        # in linksearch mode, we don't want external urls else selecting
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   384
        # the object for use in the relation is tricky
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   385
        # XXX search_state is web specific
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   386
        if getattr(self.req, 'search_state', ('normal',))[0] == 'normal':
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   387
            kwargs['base_url'] = self.metainformation()['source'].get('base-url')
1904
e23536d29231 minor refactoring of absolute_url()
Nicolas Chauvat <nicolas.chauvat@logilab.fr>
parents: 1842
diff changeset
   388
        if method in (None, 'view'):
1842
c7a22540d6f7 add some bw compat code for old rest_path prototype
sylvain.thenault@logilab.fr
parents: 1840
diff changeset
   389
            try:
c7a22540d6f7 add some bw compat code for old rest_path prototype
sylvain.thenault@logilab.fr
parents: 1840
diff changeset
   390
                kwargs['_restpath'] = self.rest_path(kwargs.get('base_url'))
c7a22540d6f7 add some bw compat code for old rest_path prototype
sylvain.thenault@logilab.fr
parents: 1840
diff changeset
   391
            except TypeError:
c7a22540d6f7 add some bw compat code for old rest_path prototype
sylvain.thenault@logilab.fr
parents: 1840
diff changeset
   392
                warn('%s: rest_path() now take use_ext_eid argument, '
c7a22540d6f7 add some bw compat code for old rest_path prototype
sylvain.thenault@logilab.fr
parents: 1840
diff changeset
   393
                     'please update' % self.id, DeprecationWarning)
c7a22540d6f7 add some bw compat code for old rest_path prototype
sylvain.thenault@logilab.fr
parents: 1840
diff changeset
   394
                kwargs['_restpath'] = self.rest_path()
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   395
        else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   396
            kwargs['rql'] = 'Any X WHERE X eid %s' % self.eid
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   397
        return self.build_url(method, **kwargs)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   398
1840
f4b5c15d1147 test and fix #342997: local eid used for absolute_url of external entities
sylvain.thenault@logilab.fr
parents: 1804
diff changeset
   399
    def rest_path(self, use_ext_eid=False):
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   400
        """returns a REST-like (relative) path for this entity"""
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   401
        mainattr, needcheck = self._rest_attr_info()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   402
        etype = str(self.e_schema)
1840
f4b5c15d1147 test and fix #342997: local eid used for absolute_url of external entities
sylvain.thenault@logilab.fr
parents: 1804
diff changeset
   403
        path = etype.lower()
f4b5c15d1147 test and fix #342997: local eid used for absolute_url of external entities
sylvain.thenault@logilab.fr
parents: 1804
diff changeset
   404
        if mainattr != 'eid':
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   405
            value = getattr(self, mainattr)
2125
19861294506f https://www.logilab.net/cwo/ticket/343724
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2005
diff changeset
   406
            if value is None or unicode(value) == u'':
1840
f4b5c15d1147 test and fix #342997: local eid used for absolute_url of external entities
sylvain.thenault@logilab.fr
parents: 1804
diff changeset
   407
                mainattr = 'eid'
f4b5c15d1147 test and fix #342997: local eid used for absolute_url of external entities
sylvain.thenault@logilab.fr
parents: 1804
diff changeset
   408
                path += '/eid'
f4b5c15d1147 test and fix #342997: local eid used for absolute_url of external entities
sylvain.thenault@logilab.fr
parents: 1804
diff changeset
   409
            elif needcheck:
f4b5c15d1147 test and fix #342997: local eid used for absolute_url of external entities
sylvain.thenault@logilab.fr
parents: 1804
diff changeset
   410
                # make sure url is not ambiguous
f4b5c15d1147 test and fix #342997: local eid used for absolute_url of external entities
sylvain.thenault@logilab.fr
parents: 1804
diff changeset
   411
                rql = 'Any COUNT(X) WHERE X is %s, X %s %%(value)s' % (
f4b5c15d1147 test and fix #342997: local eid used for absolute_url of external entities
sylvain.thenault@logilab.fr
parents: 1804
diff changeset
   412
                    etype, mainattr)
1904
e23536d29231 minor refactoring of absolute_url()
Nicolas Chauvat <nicolas.chauvat@logilab.fr>
parents: 1842
diff changeset
   413
                nbresults = self.req.execute(rql, {'value' : value})[0][0]
e23536d29231 minor refactoring of absolute_url()
Nicolas Chauvat <nicolas.chauvat@logilab.fr>
parents: 1842
diff changeset
   414
                if nbresults != 1: # ambiguity?
e23536d29231 minor refactoring of absolute_url()
Nicolas Chauvat <nicolas.chauvat@logilab.fr>
parents: 1842
diff changeset
   415
                    mainattr = 'eid'
e23536d29231 minor refactoring of absolute_url()
Nicolas Chauvat <nicolas.chauvat@logilab.fr>
parents: 1842
diff changeset
   416
                    path += '/eid'
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   417
        if mainattr == 'eid':
1840
f4b5c15d1147 test and fix #342997: local eid used for absolute_url of external entities
sylvain.thenault@logilab.fr
parents: 1804
diff changeset
   418
            if use_ext_eid:
f4b5c15d1147 test and fix #342997: local eid used for absolute_url of external entities
sylvain.thenault@logilab.fr
parents: 1804
diff changeset
   419
                value = self.metainformation()['extid']
f4b5c15d1147 test and fix #342997: local eid used for absolute_url of external entities
sylvain.thenault@logilab.fr
parents: 1804
diff changeset
   420
            else:
f4b5c15d1147 test and fix #342997: local eid used for absolute_url of external entities
sylvain.thenault@logilab.fr
parents: 1804
diff changeset
   421
                value = self.eid
f4b5c15d1147 test and fix #342997: local eid used for absolute_url of external entities
sylvain.thenault@logilab.fr
parents: 1804
diff changeset
   422
        return '%s/%s' % (path, self.req.url_quote(value))
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   423
1360
13ae1121835e rename attribute_metadata method to attr_metadata to save a few chars
sylvain.thenault@logilab.fr
parents: 1313
diff changeset
   424
    def attr_metadata(self, attr, metadata):
1101
0c067de38e46 unification of meta-attributes handling:
sylvain.thenault@logilab.fr
parents: 1098
diff changeset
   425
        """return a metadata for an attribute (None if unspecified)"""
0c067de38e46 unification of meta-attributes handling:
sylvain.thenault@logilab.fr
parents: 1098
diff changeset
   426
        value = getattr(self, '%s_%s' % (attr, metadata), None)
0c067de38e46 unification of meta-attributes handling:
sylvain.thenault@logilab.fr
parents: 1098
diff changeset
   427
        if value is None and metadata == 'encoding':
0c067de38e46 unification of meta-attributes handling:
sylvain.thenault@logilab.fr
parents: 1098
diff changeset
   428
            value = self.vreg.property_value('ui.encoding')
0c067de38e46 unification of meta-attributes handling:
sylvain.thenault@logilab.fr
parents: 1098
diff changeset
   429
        return value
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   430
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   431
    def printable_value(self, attr, value=_marker, attrtype=None,
3212
07d11bacfefe displaytime attribute should not have been removed from there
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3184
diff changeset
   432
                        format='text/html', displaytime=True):
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   433
        """return a displayable value (i.e. unicode string) which may contains
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   434
        html tags
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   435
        """
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   436
        attr = str(attr)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   437
        if value is _marker:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   438
            value = getattr(self, attr)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   439
        if isinstance(value, basestring):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   440
            value = value.strip()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   441
        if value is None or value == '': # don't use "not", 0 is an acceptable value
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   442
            return u''
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   443
        if attrtype is None:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   444
            attrtype = self.e_schema.destination(attr)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   445
        props = self.e_schema.rproperties(attr)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   446
        if attrtype == 'String':
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   447
            # internalinalized *and* formatted string such as schema
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   448
            # description...
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   449
            if props.get('internationalizable'):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   450
                value = self.req._(value)
1360
13ae1121835e rename attribute_metadata method to attr_metadata to save a few chars
sylvain.thenault@logilab.fr
parents: 1313
diff changeset
   451
            attrformat = self.attr_metadata(attr, 'format')
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   452
            if attrformat:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   453
                return self.mtc_transform(value, attrformat, format,
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   454
                                          self.req.encoding)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   455
        elif attrtype == 'Bytes':
1360
13ae1121835e rename attribute_metadata method to attr_metadata to save a few chars
sylvain.thenault@logilab.fr
parents: 1313
diff changeset
   456
            attrformat = self.attr_metadata(attr, 'format')
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   457
            if attrformat:
1360
13ae1121835e rename attribute_metadata method to attr_metadata to save a few chars
sylvain.thenault@logilab.fr
parents: 1313
diff changeset
   458
                encoding = self.attr_metadata(attr, 'encoding')
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   459
                return self.mtc_transform(value.getvalue(), attrformat, format,
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   460
                                          encoding)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   461
            return u''
3212
07d11bacfefe displaytime attribute should not have been removed from there
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3184
diff changeset
   462
        value = printable_value(self.req, attrtype, value, props,
07d11bacfefe displaytime attribute should not have been removed from there
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3184
diff changeset
   463
                                displaytime=displaytime)
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   464
        if format == 'text/html':
2312
af4d8f75c5db use xml_escape
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2125
diff changeset
   465
            value = xml_escape(value)
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   466
        return value
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   467
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   468
    def mtc_transform(self, data, format, target_format, encoding,
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   469
                      _engine=ENGINE):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   470
        trdata = TransformData(data, format, encoding, appobject=self)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   471
        data = _engine.convert(trdata, target_format).decode()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   472
        if format == 'text/html':
1474
716f0742ee7f delete-trailing-whitespaces
sylvain.thenault@logilab.fr
parents: 1471
diff changeset
   473
            data = soup2xhtml(data, self.req.encoding)
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   474
        return data
1474
716f0742ee7f delete-trailing-whitespaces
sylvain.thenault@logilab.fr
parents: 1471
diff changeset
   475
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   476
    # entity cloning ##########################################################
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   477
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   478
    def copy_relations(self, ceid):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   479
        """copy relations of the object with the given eid on this object
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   480
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   481
        By default meta and composite relations are skipped.
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   482
        Overrides this if you want another behaviour
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   483
        """
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   484
        assert self.has_eid()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   485
        execute = self.req.execute
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   486
        for rschema in self.e_schema.subject_relations():
2126
a25859917ccc stop using meta attribute from yams schema. Use instead sets defining meta relations and another defining schema types. Refactor various schema view based on this
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2059
diff changeset
   487
            if rschema.is_final() or rschema.meta:
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   488
                continue
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   489
            # skip already defined relations
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   490
            if getattr(self, rschema.type):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   491
                continue
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   492
            if rschema.type in self.skip_copy_for:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   493
                continue
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   494
            # skip composite relation
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   495
            if self.e_schema.subjrproperty(rschema, 'composite'):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   496
                continue
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   497
            # skip relation with card in ?1 else we either change the copied
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   498
            # object (inlined relation) or inserting some inconsistency
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   499
            if self.e_schema.subjrproperty(rschema, 'cardinality')[1] in '?1':
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   500
                continue
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   501
            rql = 'SET X %s V WHERE X eid %%(x)s, Y eid %%(y)s, Y %s V' % (
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   502
                rschema.type, rschema.type)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   503
            execute(rql, {'x': self.eid, 'y': ceid}, ('x', 'y'))
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   504
            self.clear_related_cache(rschema.type, 'subject')
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   505
        for rschema in self.e_schema.object_relations():
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   506
            if rschema.meta:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   507
                continue
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   508
            # skip already defined relations
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   509
            if getattr(self, 'reverse_%s' % rschema.type):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   510
                continue
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   511
            # skip composite relation
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   512
            if self.e_schema.objrproperty(rschema, 'composite'):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   513
                continue
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   514
            # skip relation with card in ?1 else we either change the copied
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   515
            # object (inlined relation) or inserting some inconsistency
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   516
            if self.e_schema.objrproperty(rschema, 'cardinality')[0] in '?1':
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   517
                continue
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   518
            rql = 'SET V %s X WHERE X eid %%(x)s, Y eid %%(y)s, V %s Y' % (
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   519
                rschema.type, rschema.type)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   520
            execute(rql, {'x': self.eid, 'y': ceid}, ('x', 'y'))
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   521
            self.clear_related_cache(rschema.type, 'object')
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   522
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   523
    # data fetching methods ###################################################
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   524
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   525
    @cached
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   526
    def as_rset(self):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   527
        """returns a resultset containing `self` information"""
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   528
        rset = ResultSet([(self.eid,)], 'Any X WHERE X eid %(x)s',
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   529
                         {'x': self.eid}, [(self.id,)])
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   530
        return self.req.decorate_rset(rset)
1474
716f0742ee7f delete-trailing-whitespaces
sylvain.thenault@logilab.fr
parents: 1471
diff changeset
   531
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   532
    def to_complete_relations(self):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   533
        """by default complete final relations to when calling .complete()"""
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   534
        for rschema in self.e_schema.subject_relations():
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   535
            if rschema.is_final():
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   536
                continue
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   537
            if len(rschema.objects(self.e_schema)) > 1:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   538
                # ambigous relations, the querier doesn't handle
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   539
                # outer join correctly in this case
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   540
                continue
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   541
            if rschema.inlined:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   542
                matching_groups = self.req.user.matching_groups
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   543
                if matching_groups(rschema.get_groups('read')) and \
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   544
                   all(matching_groups(es.get_groups('read'))
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   545
                       for es in rschema.objects(self.e_schema)):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   546
                    yield rschema, 'subject'
1474
716f0742ee7f delete-trailing-whitespaces
sylvain.thenault@logilab.fr
parents: 1471
diff changeset
   547
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   548
    def to_complete_attributes(self, skip_bytes=True):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   549
        for rschema, attrschema in self.e_schema.attribute_definitions():
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   550
            # skip binary data by default
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   551
            if skip_bytes and attrschema.type == 'Bytes':
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   552
                continue
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   553
            attr = rschema.type
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   554
            if attr == 'eid':
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   555
                continue
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   556
            # password retreival is blocked at the repository server level
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   557
            if not self.req.user.matching_groups(rschema.get_groups('read')) \
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   558
                   or attrschema.type == 'Password':
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   559
                self[attr] = None
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   560
                continue
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   561
            yield attr
1474
716f0742ee7f delete-trailing-whitespaces
sylvain.thenault@logilab.fr
parents: 1471
diff changeset
   562
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   563
    def complete(self, attributes=None, skip_bytes=True):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   564
        """complete this entity by adding missing attributes (i.e. query the
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   565
        repository to fill the entity)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   566
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   567
        :type skip_bytes: bool
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   568
        :param skip_bytes:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   569
          if true, attribute of type Bytes won't be considered
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   570
        """
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   571
        assert self.has_eid()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   572
        varmaker = rqlvar_maker()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   573
        V = varmaker.next()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   574
        rql = ['WHERE %s eid %%(x)s' % V]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   575
        selected = []
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   576
        for attr in (attributes or self.to_complete_attributes(skip_bytes)):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   577
            # if attribute already in entity, nothing to do
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   578
            if self.has_key(attr):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   579
                continue
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   580
            # case where attribute must be completed, but is not yet in entity
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   581
            var = varmaker.next()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   582
            rql.append('%s %s %s' % (V, attr, var))
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   583
            selected.append((attr, var))
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   584
        # +1 since this doen't include the main variable
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   585
        lastattr = len(selected) + 1
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   586
        if attributes is None:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   587
            # fetch additional relations (restricted to 0..1 relations)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   588
            for rschema, role in self.to_complete_relations():
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   589
                rtype = rschema.type
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   590
                if self.relation_cached(rtype, role):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   591
                    continue
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   592
                var = varmaker.next()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   593
                if role == 'subject':
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   594
                    targettype = rschema.objects(self.e_schema)[0]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   595
                    card = rschema.rproperty(self.e_schema, targettype,
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   596
                                             'cardinality')[0]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   597
                    if card == '1':
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   598
                        rql.append('%s %s %s' % (V, rtype, var))
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   599
                    else: # '?"
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   600
                        rql.append('%s %s %s?' % (V, rtype, var))
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   601
                else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   602
                    targettype = rschema.subjects(self.e_schema)[1]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   603
                    card = rschema.rproperty(self.e_schema, targettype,
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   604
                                             'cardinality')[1]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   605
                    if card == '1':
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   606
                        rql.append('%s %s %s' % (var, rtype, V))
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   607
                    else: # '?"
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   608
                        rql.append('%s? %s %s' % (var, rtype, V))
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   609
                assert card in '1?', '%s %s %s %s' % (self.e_schema, rtype,
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   610
                                                      role, card)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   611
                selected.append(((rtype, role), var))
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   612
        if selected:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   613
            # select V, we need it as the left most selected variable
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   614
            # if some outer join are included to fetch inlined relations
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   615
            rql = 'Any %s,%s %s' % (V, ','.join(var for attr, var in selected),
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   616
                                    ','.join(rql))
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   617
            execute = getattr(self.req, 'unsafe_execute', self.req.execute)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   618
            rset = execute(rql, {'x': self.eid}, 'x', build_descr=False)[0]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   619
            # handle attributes
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   620
            for i in xrange(1, lastattr):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   621
                self[str(selected[i-1][0])] = rset[i]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   622
            # handle relations
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   623
            for i in xrange(lastattr, len(rset)):
2941
196493bd099c [entity] use role instead of x
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2931
diff changeset
   624
                rtype, role = selected[i-1][0]
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   625
                value = rset[i]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   626
                if value is None:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   627
                    rrset = ResultSet([], rql, {'x': self.eid})
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   628
                    self.req.decorate_rset(rrset)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   629
                else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   630
                    rrset = self.req.eid_rset(value)
2941
196493bd099c [entity] use role instead of x
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2931
diff changeset
   631
                self.set_related_cache(rtype, role, rrset)
1474
716f0742ee7f delete-trailing-whitespaces
sylvain.thenault@logilab.fr
parents: 1471
diff changeset
   632
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   633
    def get_value(self, name):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   634
        """get value for the attribute relation <name>, query the repository
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   635
        to get the value if necessary.
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   636
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   637
        :type name: str
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   638
        :param name: name of the attribute to get
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   639
        """
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   640
        try:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   641
            value = self[name]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   642
        except KeyError:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   643
            if not self.is_saved():
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   644
                return None
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   645
            rql = "Any A WHERE X eid %%(x)s, X %s A" % name
2647
b0a2e779845c enable server side entity caching, 25% speedup on codenaf insertion. ALL CW TESTS OK
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2613
diff changeset
   646
            # XXX should we really use unsafe_execute here? I think so (syt),
b0a2e779845c enable server side entity caching, 25% speedup on codenaf insertion. ALL CW TESTS OK
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2613
diff changeset
   647
            # see #344874
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   648
            execute = getattr(self.req, 'unsafe_execute', self.req.execute)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   649
            try:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   650
                rset = execute(rql, {'x': self.eid}, 'x')
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   651
            except Unauthorized:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   652
                self[name] = value = None
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   653
            else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   654
                assert rset.rowcount <= 1, (self, rql, rset.rowcount)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   655
                try:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   656
                    self[name] = value = rset.rows[0][0]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   657
                except IndexError:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   658
                    # probably a multisource error
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   659
                    self.critical("can't get value for attribute %s of entity with eid %s",
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   660
                                  name, self.eid)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   661
                    if self.e_schema.destination(name) == 'String':
2320
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2312
diff changeset
   662
                        # XXX (syt) imo emtpy string is better
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   663
                        self[name] = value = self.req._('unaccessible')
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   664
                    else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   665
                        self[name] = value = None
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   666
        return value
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   667
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   668
    def related(self, rtype, role='subject', limit=None, entities=False):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   669
        """returns a resultset of related entities
1474
716f0742ee7f delete-trailing-whitespaces
sylvain.thenault@logilab.fr
parents: 1471
diff changeset
   670
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   671
        :param role: is the role played by 'self' in the relation ('subject' or 'object')
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   672
        :param limit: resultset's maximum size
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   673
        :param entities: if True, the entites are returned; if False, a result set is returned
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   674
        """
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   675
        try:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   676
            return self.related_cache(rtype, role, entities, limit)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   677
        except KeyError:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   678
            pass
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   679
        assert self.has_eid()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   680
        rql = self.related_rql(rtype, role)
2647
b0a2e779845c enable server side entity caching, 25% speedup on codenaf insertion. ALL CW TESTS OK
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2613
diff changeset
   681
        # XXX should we really use unsafe_execute here? I think so (syt),
b0a2e779845c enable server side entity caching, 25% speedup on codenaf insertion. ALL CW TESTS OK
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2613
diff changeset
   682
        # see #344874
b0a2e779845c enable server side entity caching, 25% speedup on codenaf insertion. ALL CW TESTS OK
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2613
diff changeset
   683
        execute = getattr(self.req, 'unsafe_execute', self.req.execute)
b0a2e779845c enable server side entity caching, 25% speedup on codenaf insertion. ALL CW TESTS OK
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2613
diff changeset
   684
        rset = execute(rql, {'x': self.eid}, 'x')
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   685
        self.set_related_cache(rtype, role, rset)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   686
        return self.related(rtype, role, limit, entities)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   687
3130
2486163c4630 allow to specify targettypes in related_rql
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3047
diff changeset
   688
    def related_rql(self, rtype, role='subject', targettypes=None):
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   689
        rschema = self.schema[rtype]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   690
        if role == 'subject':
3130
2486163c4630 allow to specify targettypes in related_rql
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3047
diff changeset
   691
            if targettypes is None:
2486163c4630 allow to specify targettypes in related_rql
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3047
diff changeset
   692
                targettypes = rschema.objects(self.e_schema)
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   693
            restriction = 'E eid %%(x)s, E %s X' % rtype
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   694
            card = greater_card(rschema, (self.e_schema,), targettypes, 0)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   695
        else:
3130
2486163c4630 allow to specify targettypes in related_rql
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3047
diff changeset
   696
            if targettypes is None:
2486163c4630 allow to specify targettypes in related_rql
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3047
diff changeset
   697
                targettypes = rschema.subjects(self.e_schema)
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   698
            restriction = 'E eid %%(x)s, X %s E' % rtype
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   699
            card = greater_card(rschema, targettypes, (self.e_schema,), 1)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   700
        if len(targettypes) > 1:
413
a7366dd3c33c fix bug in entity.related_rql(): fetch_attr list / fetchorder weren't computed correctly
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 397
diff changeset
   701
            fetchattrs_list = []
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   702
            for ttype in targettypes:
2650
18aec79ec3a3 R [vreg] important refactoring of the vregistry, moving behaviour to end dictionnary (and so leaving room for more flexibility ; keep bw compat ; update api usage in cw
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2647
diff changeset
   703
                etypecls = self.vreg['etypes'].etype_class(ttype)
413
a7366dd3c33c fix bug in entity.related_rql(): fetch_attr list / fetchorder weren't computed correctly
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 397
diff changeset
   704
                fetchattrs_list.append(set(etypecls.fetch_attrs))
a7366dd3c33c fix bug in entity.related_rql(): fetch_attr list / fetchorder weren't computed correctly
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 397
diff changeset
   705
            fetchattrs = reduce(set.intersection, fetchattrs_list)
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   706
            rql = etypecls.fetch_rql(self.req.user, [restriction], fetchattrs,
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   707
                                     settype=False)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   708
        else:
2650
18aec79ec3a3 R [vreg] important refactoring of the vregistry, moving behaviour to end dictionnary (and so leaving room for more flexibility ; keep bw compat ; update api usage in cw
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2647
diff changeset
   709
            etypecls = self.vreg['etypes'].etype_class(targettypes[0])
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   710
            rql = etypecls.fetch_rql(self.req.user, [restriction], settype=False)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   711
        # optimisation: remove ORDERBY if cardinality is 1 or ? (though
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   712
        # greater_card return 1 for those both cases)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   713
        if card == '1':
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   714
            if ' ORDERBY ' in rql:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   715
                rql = '%s WHERE %s' % (rql.split(' ORDERBY ', 1)[0],
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   716
                                       rql.split(' WHERE ', 1)[1])
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   717
        elif not ' ORDERBY ' in rql:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   718
            args = tuple(rql.split(' WHERE ', 1))
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   719
            rql = '%s ORDERBY Z DESC WHERE X modification_date Z, %s' % args
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   720
        return rql
1474
716f0742ee7f delete-trailing-whitespaces
sylvain.thenault@logilab.fr
parents: 1471
diff changeset
   721
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   722
    # generic vocabulary methods ##############################################
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   723
2613
5e19c2bb370e R [all] logilab.common 0.44 provides only deprecated
Nicolas Chauvat <nicolas.chauvat@logilab.fr>
parents: 2421
diff changeset
   724
    @deprecated('see new form api')
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   725
    def vocabulary(self, rtype, role='subject', limit=None):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   726
        """vocabulary functions must return a list of couples
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   727
        (label, eid) that will typically be used to fill the
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   728
        edition view's combobox.
1474
716f0742ee7f delete-trailing-whitespaces
sylvain.thenault@logilab.fr
parents: 1471
diff changeset
   729
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   730
        If `eid` is None in one of these couples, it should be
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   731
        interpreted as a separator in case vocabulary results are grouped
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   732
        """
1008
f54b4309a3f5 bw compat for vocabulary using new form
sylvain.thenault@logilab.fr
parents: 985
diff changeset
   733
        from logilab.common.testlib import mock_object
2058
7ef12c03447c nicer vreg api, try to make rset an optional named argument in select and derivated (including selectors)
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2005
diff changeset
   734
        form = self.vreg.select('forms', 'edition', self.req, entity=self)
1008
f54b4309a3f5 bw compat for vocabulary using new form
sylvain.thenault@logilab.fr
parents: 985
diff changeset
   735
        field = mock_object(name=rtype, role=role)
1031
1a89683cb687 restore limit on form_field_vocabulary, actually used
sylvain.thenault@logilab.fr
parents: 1008
diff changeset
   736
        return form.form_field_vocabulary(field, limit)
1474
716f0742ee7f delete-trailing-whitespaces
sylvain.thenault@logilab.fr
parents: 1471
diff changeset
   737
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   738
    def unrelated_rql(self, rtype, targettype, role, ordermethod=None,
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   739
                      vocabconstraints=True):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   740
        """build a rql to fetch `targettype` entities unrelated to this entity
3241
1a6f7a0e7dbd unrelated_rql now considers relation's add perm
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3212
diff changeset
   741
        using (rtype, role) relation.
1a6f7a0e7dbd unrelated_rql now considers relation's add perm
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3212
diff changeset
   742
1a6f7a0e7dbd unrelated_rql now considers relation's add perm
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3212
diff changeset
   743
        Consider relation permissions so that returned entities may be actually
1a6f7a0e7dbd unrelated_rql now considers relation's add perm
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3212
diff changeset
   744
        linked by `rtype`.
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   745
        """
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   746
        ordermethod = ordermethod or 'fetch_unrelated_order'
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   747
        if isinstance(rtype, basestring):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   748
            rtype = self.schema.rschema(rtype)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   749
        if role == 'subject':
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   750
            evar, searchedvar = 'S', 'O'
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   751
            subjtype, objtype = self.e_schema, targettype
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   752
        else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   753
            searchedvar, evar = 'S', 'O'
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   754
            objtype, subjtype = self.e_schema, targettype
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   755
        if self.has_eid():
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   756
            restriction = ['NOT S %s O' % rtype, '%s eid %%(x)s' % evar]
3241
1a6f7a0e7dbd unrelated_rql now considers relation's add perm
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3212
diff changeset
   757
            args = {'x': self.eid}
1a6f7a0e7dbd unrelated_rql now considers relation's add perm
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3212
diff changeset
   758
            if role == 'subject':
1a6f7a0e7dbd unrelated_rql now considers relation's add perm
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3212
diff changeset
   759
                securitycheck_args = {'fromeid': self.eid}
1a6f7a0e7dbd unrelated_rql now considers relation's add perm
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3212
diff changeset
   760
            else:
1a6f7a0e7dbd unrelated_rql now considers relation's add perm
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3212
diff changeset
   761
                securitycheck_args = {'toeid': self.eid}
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   762
        else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   763
            restriction = []
3241
1a6f7a0e7dbd unrelated_rql now considers relation's add perm
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3212
diff changeset
   764
            args = {}
1a6f7a0e7dbd unrelated_rql now considers relation's add perm
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3212
diff changeset
   765
            securitycheck_args = {}
1a6f7a0e7dbd unrelated_rql now considers relation's add perm
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3212
diff changeset
   766
        insertsecurity = (rtype.has_local_role('add') and not
1a6f7a0e7dbd unrelated_rql now considers relation's add perm
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3212
diff changeset
   767
                          rtype.has_perm(self.req, 'add', **securitycheck_args))
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   768
        constraints = rtype.rproperty(subjtype, objtype, 'constraints')
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   769
        if vocabconstraints:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   770
            # RQLConstraint is a subclass for RQLVocabularyConstraint, so they
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   771
            # will be included as well
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   772
            restriction += [cstr.restriction for cstr in constraints
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   773
                            if isinstance(cstr, RQLVocabularyConstraint)]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   774
        else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   775
            restriction += [cstr.restriction for cstr in constraints
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   776
                            if isinstance(cstr, RQLConstraint)]
2650
18aec79ec3a3 R [vreg] important refactoring of the vregistry, moving behaviour to end dictionnary (and so leaving room for more flexibility ; keep bw compat ; update api usage in cw
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2647
diff changeset
   777
        etypecls = self.vreg['etypes'].etype_class(targettype)
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   778
        rql = etypecls.fetch_rql(self.req.user, restriction,
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   779
                                 mainvar=searchedvar, ordermethod=ordermethod)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   780
        # ensure we have an order defined
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   781
        if not ' ORDERBY ' in rql:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   782
            before, after = rql.split(' WHERE ', 1)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   783
            rql = '%s ORDERBY %s WHERE %s' % (before, searchedvar, after)
3241
1a6f7a0e7dbd unrelated_rql now considers relation's add perm
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3212
diff changeset
   784
        if insertsecurity:
1a6f7a0e7dbd unrelated_rql now considers relation's add perm
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3212
diff changeset
   785
            rqlexprs = rtype.get_rqlexprs('add')
1a6f7a0e7dbd unrelated_rql now considers relation's add perm
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3212
diff changeset
   786
            rewriter = RQLRewriter(self.req)
1a6f7a0e7dbd unrelated_rql now considers relation's add perm
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3212
diff changeset
   787
            rqlst = self.req.vreg.parse(self.req, rql, args)
1a6f7a0e7dbd unrelated_rql now considers relation's add perm
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3212
diff changeset
   788
            for select in rqlst.children:
1a6f7a0e7dbd unrelated_rql now considers relation's add perm
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3212
diff changeset
   789
                rewriter.rewrite(select, [((searchedvar, searchedvar), rqlexprs)],
1a6f7a0e7dbd unrelated_rql now considers relation's add perm
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3212
diff changeset
   790
                                 select.solutions, args)
1a6f7a0e7dbd unrelated_rql now considers relation's add perm
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3212
diff changeset
   791
            rql = rqlst.as_string()
1a6f7a0e7dbd unrelated_rql now considers relation's add perm
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3212
diff changeset
   792
        return rql, args
1474
716f0742ee7f delete-trailing-whitespaces
sylvain.thenault@logilab.fr
parents: 1471
diff changeset
   793
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   794
    def unrelated(self, rtype, targettype, role='subject', limit=None,
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   795
                  ordermethod=None):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   796
        """return a result set of target type objects that may be related
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   797
        by a given relation, with self as subject or object
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   798
        """
3241
1a6f7a0e7dbd unrelated_rql now considers relation's add perm
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3212
diff changeset
   799
        try:
1a6f7a0e7dbd unrelated_rql now considers relation's add perm
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3212
diff changeset
   800
            rql, args = self.unrelated_rql(rtype, targettype, role, ordermethod)
1a6f7a0e7dbd unrelated_rql now considers relation's add perm
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3212
diff changeset
   801
        except Unauthorized:
1a6f7a0e7dbd unrelated_rql now considers relation's add perm
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3212
diff changeset
   802
            return self.req.empty_rset()
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   803
        if limit is not None:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   804
            before, after = rql.split(' WHERE ', 1)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   805
            rql = '%s LIMIT %s WHERE %s' % (before, limit, after)
3241
1a6f7a0e7dbd unrelated_rql now considers relation's add perm
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3212
diff changeset
   806
        return self.req.execute(rql, args, tuple(args.keys()))
1474
716f0742ee7f delete-trailing-whitespaces
sylvain.thenault@logilab.fr
parents: 1471
diff changeset
   807
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   808
    # relations cache handling ################################################
1474
716f0742ee7f delete-trailing-whitespaces
sylvain.thenault@logilab.fr
parents: 1471
diff changeset
   809
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   810
    def relation_cached(self, rtype, role):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   811
        """return true if the given relation is already cached on the instance
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   812
        """
2647
b0a2e779845c enable server side entity caching, 25% speedup on codenaf insertion. ALL CW TESTS OK
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2613
diff changeset
   813
        return self._related_cache.get('%s_%s' % (rtype, role))
1474
716f0742ee7f delete-trailing-whitespaces
sylvain.thenault@logilab.fr
parents: 1471
diff changeset
   814
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   815
    def related_cache(self, rtype, role, entities=True, limit=None):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   816
        """return values for the given relation if it's cached on the instance,
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   817
        else raise `KeyError`
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   818
        """
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   819
        res = self._related_cache['%s_%s' % (rtype, role)][entities]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   820
        if limit:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   821
            if entities:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   822
                res = res[:limit]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   823
            else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   824
                res = res.limit(limit)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   825
        return res
1474
716f0742ee7f delete-trailing-whitespaces
sylvain.thenault@logilab.fr
parents: 1471
diff changeset
   826
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   827
    def set_related_cache(self, rtype, role, rset, col=0):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   828
        """set cached values for the given relation"""
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   829
        if rset:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   830
            related = list(rset.entities(col))
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   831
            rschema = self.schema.rschema(rtype)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   832
            if role == 'subject':
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   833
                rcard = rschema.rproperty(self.e_schema, related[0].e_schema,
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   834
                                          'cardinality')[1]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   835
                target = 'object'
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   836
            else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   837
                rcard = rschema.rproperty(related[0].e_schema, self.e_schema,
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   838
                                          'cardinality')[0]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   839
                target = 'subject'
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   840
            if rcard in '?1':
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   841
                for rentity in related:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   842
                    rentity._related_cache['%s_%s' % (rtype, target)] = (self.as_rset(), [self])
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   843
        else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   844
            related = []
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   845
        self._related_cache['%s_%s' % (rtype, role)] = (rset, related)
1474
716f0742ee7f delete-trailing-whitespaces
sylvain.thenault@logilab.fr
parents: 1471
diff changeset
   846
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   847
    def clear_related_cache(self, rtype=None, role=None):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   848
        """clear cached values for the given relation or the entire cache if
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   849
        no relation is given
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   850
        """
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   851
        if rtype is None:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   852
            self._related_cache = {}
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   853
        else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   854
            assert role
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   855
            self._related_cache.pop('%s_%s' % (rtype, role), None)
1474
716f0742ee7f delete-trailing-whitespaces
sylvain.thenault@logilab.fr
parents: 1471
diff changeset
   856
2942
77ebdbe93cf8 [entity] generic clear_all_caches methods, to use in test
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2941
diff changeset
   857
    def clear_all_caches(self):
77ebdbe93cf8 [entity] generic clear_all_caches methods, to use in test
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2941
diff changeset
   858
        self.clear()
77ebdbe93cf8 [entity] generic clear_all_caches methods, to use in test
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2941
diff changeset
   859
        for rschema, _, role in self.e_schema.relation_definitions():
77ebdbe93cf8 [entity] generic clear_all_caches methods, to use in test
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2941
diff changeset
   860
            self.clear_related_cache(rschema.type, role)
77ebdbe93cf8 [entity] generic clear_all_caches methods, to use in test
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2941
diff changeset
   861
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   862
    # raw edition utilities ###################################################
1474
716f0742ee7f delete-trailing-whitespaces
sylvain.thenault@logilab.fr
parents: 1471
diff changeset
   863
2877
e469f3602858 new _cw_unsafe argument to Entity.set_attributes until something nicer is done (eg #344874)
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2875
diff changeset
   864
    def set_attributes(self, _cw_unsafe=False, **kwargs):
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   865
        assert kwargs
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   866
        relations = []
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   867
        for key in kwargs:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   868
            relations.append('X %s %%(%s)s' % (key, key))
397
cf577e26f924 don't introduce a spurious 'x' key in the entity-as dict
Aurelien Campeas <aurelien.campeas@logilab.fr>
parents: 237
diff changeset
   869
        # update current local object
cf577e26f924 don't introduce a spurious 'x' key in the entity-as dict
Aurelien Campeas <aurelien.campeas@logilab.fr>
parents: 237
diff changeset
   870
        self.update(kwargs)
cf577e26f924 don't introduce a spurious 'x' key in the entity-as dict
Aurelien Campeas <aurelien.campeas@logilab.fr>
parents: 237
diff changeset
   871
        # and now update the database
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   872
        kwargs['x'] = self.eid
2877
e469f3602858 new _cw_unsafe argument to Entity.set_attributes until something nicer is done (eg #344874)
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2875
diff changeset
   873
        if _cw_unsafe:
e469f3602858 new _cw_unsafe argument to Entity.set_attributes until something nicer is done (eg #344874)
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2875
diff changeset
   874
            self.req.unsafe_execute(
e469f3602858 new _cw_unsafe argument to Entity.set_attributes until something nicer is done (eg #344874)
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2875
diff changeset
   875
                'SET %s WHERE X eid %%(x)s' % ','.join(relations), kwargs, 'x')
e469f3602858 new _cw_unsafe argument to Entity.set_attributes until something nicer is done (eg #344874)
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2875
diff changeset
   876
        else:
e469f3602858 new _cw_unsafe argument to Entity.set_attributes until something nicer is done (eg #344874)
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2875
diff changeset
   877
            self.req.execute('SET %s WHERE X eid %%(x)s' % ','.join(relations),
e469f3602858 new _cw_unsafe argument to Entity.set_attributes until something nicer is done (eg #344874)
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2875
diff changeset
   878
                             kwargs, 'x')
1474
716f0742ee7f delete-trailing-whitespaces
sylvain.thenault@logilab.fr
parents: 1471
diff changeset
   879
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   880
    def delete(self):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   881
        assert self.has_eid(), self.eid
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   882
        self.req.execute('DELETE %s X WHERE X eid %%(x)s' % self.e_schema,
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   883
                         {'x': self.eid})
1474
716f0742ee7f delete-trailing-whitespaces
sylvain.thenault@logilab.fr
parents: 1471
diff changeset
   884
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   885
    # server side utilities ###################################################
1474
716f0742ee7f delete-trailing-whitespaces
sylvain.thenault@logilab.fr
parents: 1471
diff changeset
   886
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   887
    def set_defaults(self):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   888
        """set default values according to the schema"""
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   889
        self._default_set = set()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   890
        for attr, value in self.e_schema.defaults():
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   891
            if not self.has_key(attr):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   892
                self[str(attr)] = value
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   893
                self._default_set.add(attr)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   894
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   895
    def check(self, creation=False):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   896
        """check this entity against its schema. Only final relation
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   897
        are checked here, constraint on actual relations are checked in hooks
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   898
        """
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   899
        # necessary since eid is handled specifically and yams require it to be
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   900
        # in the dictionary
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   901
        if self.req is None:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   902
            _ = unicode
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   903
        else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   904
            _ = self.req._
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   905
        self.e_schema.check(self, creation=creation, _=_)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   906
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   907
    def fti_containers(self, _done=None):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   908
        if _done is None:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   909
            _done = set()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   910
        _done.add(self.eid)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   911
        containers = tuple(self.e_schema.fulltext_containers())
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   912
        if containers:
476
62968fa8845c yield self if no ft container found
sylvain.thenault@logilab.fr
parents: 475
diff changeset
   913
            yielded = False
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   914
            for rschema, target in containers:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   915
                if target == 'object':
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   916
                    targets = getattr(self, rschema.type)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   917
                else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   918
                    targets = getattr(self, 'reverse_%s' % rschema)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   919
                for entity in targets:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   920
                    if entity.eid in _done:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   921
                        continue
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   922
                    for container in entity.fti_containers(_done):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   923
                        yield container
476
62968fa8845c yield self if no ft container found
sylvain.thenault@logilab.fr
parents: 475
diff changeset
   924
                        yielded = True
62968fa8845c yield self if no ft container found
sylvain.thenault@logilab.fr
parents: 475
diff changeset
   925
            if not yielded:
62968fa8845c yield self if no ft container found
sylvain.thenault@logilab.fr
parents: 475
diff changeset
   926
                yield self
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   927
        else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   928
            yield self
1474
716f0742ee7f delete-trailing-whitespaces
sylvain.thenault@logilab.fr
parents: 1471
diff changeset
   929
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   930
    def get_words(self):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   931
        """used by the full text indexer to get words to index
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   932
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   933
        this method should only be used on the repository side since it depends
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   934
        on the indexer package
1474
716f0742ee7f delete-trailing-whitespaces
sylvain.thenault@logilab.fr
parents: 1471
diff changeset
   935
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   936
        :rtype: list
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   937
        :return: the list of indexable word of this entity
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   938
        """
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   939
        from indexer.query_objects import tokenize
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   940
        words = []
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   941
        for rschema in self.e_schema.indexable_attributes():
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   942
            try:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   943
                value = self.printable_value(rschema, format='text/plain')
1132
96752791c2b6 pylint cleanup
sylvain.thenault@logilab.fr
parents: 1101
diff changeset
   944
            except TransformError:
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   945
                continue
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   946
            except:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   947
                self.exception("can't add value of %s to text index for entity %s",
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   948
                               rschema, self.eid)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   949
                continue
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   950
            if value:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   951
                words += tokenize(value)
1474
716f0742ee7f delete-trailing-whitespaces
sylvain.thenault@logilab.fr
parents: 1471
diff changeset
   952
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   953
        for rschema, role in self.e_schema.fulltext_relations():
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   954
            if role == 'subject':
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   955
                for entity in getattr(self, rschema.type):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   956
                    words += entity.get_words()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   957
            else: # if role == 'object':
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   958
                for entity in getattr(self, 'reverse_%s' % rschema.type):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   959
                    words += entity.get_words()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   960
        return words
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   961
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   962
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   963
# attribute and relation descriptors ##########################################
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   964
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   965
class Attribute(object):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   966
    """descriptor that controls schema attribute access"""
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   967
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   968
    def __init__(self, attrname):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   969
        assert attrname != 'eid'
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   970
        self._attrname = attrname
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   971
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   972
    def __get__(self, eobj, eclass):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   973
        if eobj is None:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   974
            return self
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   975
        return eobj.get_value(self._attrname)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   976
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   977
    def __set__(self, eobj, value):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   978
        eobj[self._attrname] = value
2875
b7399ef8b3e0 towards better edited attributes handling
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2872
diff changeset
   979
        if hasattr(eobj, 'edited_attributes'):
b7399ef8b3e0 towards better edited attributes handling
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2872
diff changeset
   980
            eobj.edited_attributes.add(self._attrname)
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   981
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   982
class Relation(object):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   983
    """descriptor that controls schema relation access"""
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   984
    _role = None # for pylint
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   985
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   986
    def __init__(self, rschema):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   987
        self._rschema = rschema
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   988
        self._rtype = rschema.type
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   989
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   990
    def __get__(self, eobj, eclass):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   991
        if eobj is None:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   992
            raise AttributeError('%s cannot be only be accessed from instances'
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   993
                                 % self._rtype)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   994
        return eobj.related(self._rtype, self._role, entities=True)
1474
716f0742ee7f delete-trailing-whitespaces
sylvain.thenault@logilab.fr
parents: 1471
diff changeset
   995
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   996
    def __set__(self, eobj, value):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   997
        raise NotImplementedError
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   998
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   999
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1000
class SubjectRelation(Relation):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1001
    """descriptor that controls schema relation access"""
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
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  1002
    _role = 'subject'
1474
716f0742ee7f delete-trailing-whitespaces
sylvain.thenault@logilab.fr
parents: 1471
diff changeset
  1003
0
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1004
class ObjectRelation(Relation):
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1005
    """descriptor that controls schema relation access"""
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1006
    _role = 'object'
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1007
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1008
from logging import getLogger
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
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  1009
from cubicweb import set_log_methods
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
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  1010
set_log_methods(Entity, getLogger('cubicweb.entity'))