entity.py
author sylvain.thenault@logilab.fr
Mon, 23 Mar 2009 17:55:59 +0100
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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), all rights reserved.
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:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr
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"""
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__docformat__ = "restructuredtext en"
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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 obsolete
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from logilab.mtconverter import TransformData, TransformError, html_escape
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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 AppRsetObject
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from cubicweb.schema import RQLVocabularyConstraint, RQLConstraint, bw_normalize_etype
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try:
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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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except ImportError:
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    # missing -common
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    MI_REL_TRIGGERS = {}
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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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class RelationTags(object):
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    MODE_TAGS = frozenset(('link', 'create'))
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    CATEGORY_TAGS = frozenset(('primary', 'secondary', 'generic', 'generated',
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                               'inlineview'))
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    def __init__(self, eclass, tagdefs):
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        # XXX if a rtag is redefined in a subclass,
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        # the rtag of the base class overwrite the rtag of the subclass
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        self.eclass = eclass
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        self._tagdefs = {}
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        for relation, tags in tagdefs.iteritems():
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            # tags must become a set
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            if isinstance(tags, basestring):
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                tags = set((tags,))
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            elif not isinstance(tags, set):
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                tags = set(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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                self._tagdefs[(relation, '*', 'subject')] = tags
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                self._tagdefs[(relation, '*', 'object')] = tags
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            elif len(relation) == 1: # useful ?
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                self._tagdefs[(relation[0], '*', 'subject')] = tags
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                self._tagdefs[(relation[0], '*', 'object')] = tags
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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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                self._tagdefs[rtype, ttype, 'subject'] = tags
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                self._tagdefs[rtype, ttype, 'object'] = tags
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            elif len(relation) == 3:
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                relation = list(relation)  # XXX bw compat
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                relation[1] = bw_normalize_etype(relation[1])
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                self._tagdefs[tuple(relation)] = tags
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            else:
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                raise ValueError('bad rtag definition (%r)' % (relation,))
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    def __initialize__(self):
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        # eclass.[*]schema are only set when registering
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        self.schema = self.eclass.schema
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        eschema = self.eschema = self.eclass.e_schema
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        rtags = self._tagdefs
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        # expand wildcards in rtags and add automatic tags
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        for rschema, tschemas, role in sorted(eschema.relation_definitions(True)):
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            rtype = rschema.type
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            star_tags = rtags.pop((rtype, '*', role), set())
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            for tschema in tschemas:
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                tags = rtags.setdefault((rtype, tschema.type, role), set(star_tags))
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                if role == 'subject':
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                    X, Y = eschema, tschema
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                    card = rschema.rproperty(X, Y, 'cardinality')[0]
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                    composed = rschema.rproperty(X, Y, 'composite') == 'object'
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                else:
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                    X, Y = tschema, eschema
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                    card = rschema.rproperty(X, Y, 'cardinality')[1]
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                    composed = rschema.rproperty(X, Y, 'composite') == 'subject'
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                # set default category tags if needed
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                if not tags & self.CATEGORY_TAGS:
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                    if card in '1+':
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                        if not rschema.is_final() and composed:
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                            category = 'generated'
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                        elif rschema.is_final() and (
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                            rschema.type.endswith('_format')
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                            or rschema.type.endswith('_encoding')):
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                            category = 'generated'
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                        else:
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                            category = 'primary'
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                    elif rschema.is_final():
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                        if (rschema.type.endswith('_format')
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                            or rschema.type.endswith('_encoding')):
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                            category = 'generated'
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                        else:
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                            category = 'secondary'
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                    else: 
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                        category = 'generic'
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                    tags.add(category)
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                if not tags & self.MODE_TAGS:
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                    if card in '?1':
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                        # by default, suppose link mode if cardinality doesn't allow
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                        # more than one relation
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                        mode = 'link'
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                    elif rschema.rproperty(X, Y, 'composite') == role:
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                        # if self is composed of the target type, create mode
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                        mode = 'create'
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                    else:
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                        # link mode by default
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                        mode = 'link'
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                    tags.add(mode)
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    def _default_target(self, rschema, role='subject'):
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        eschema = self.eschema
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        if role == 'subject':
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            return eschema.subject_relation(rschema).objects(eschema)[0]
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        else:
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            return eschema.object_relation(rschema).subjects(eschema)[0]
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    # dict compat
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    def __getitem__(self, key):
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        if isinstance(key, basestring):
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            key = (key,)
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        return self.get_tags(*key)
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    __contains__ = __getitem__
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    def get_tags(self, rtype, targettype=None, role='subject'):
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        rschema = self.schema.rschema(rtype)
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        if targettype is None:
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            tschema = self._default_target(rschema, role)
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        else:
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            tschema = self.schema.eschema(targettype)
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        return self._tagdefs[(rtype, tschema.type, role)]
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    __call__ = get_tags
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    def get_mode(self, rtype, targettype=None, role='subject'):
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        # XXX: should we make an assertion on rtype not being final ?
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        # assert not rschema.is_final()
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        tags = self.get_tags(rtype, targettype, role)
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        # do not change the intersection order !
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        modes = tags & self.MODE_TAGS
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        assert len(modes) == 1
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        return modes.pop()
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    def get_category(self, rtype, targettype=None, role='subject'):
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        tags = self.get_tags(rtype, targettype, role)
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        categories = tags & self.CATEGORY_TAGS
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        assert len(categories) == 1
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        return categories.pop()
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    def is_inlined(self, rtype, targettype=None, role='subject'):
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        # return set(('primary', 'secondary')) & self.get_tags(rtype, targettype)
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        return 'inlineview' in self.get_tags(rtype, targettype, role)
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712
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class metaentity(type):
0
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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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        tagdefs = {}
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        widgets = {}
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        for base in bases:
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            tagdefs.update(getattr(base, '__rtags__', {}))
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            widgets.update(getattr(base, 'widgets', {}))
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        # update with the class' own rtgas
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        tagdefs.update(classdict.get('__rtags__', {}))
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        widgets.update(classdict.get('widgets', {}))
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        # XXX decide whether or not it's a good idea to replace __rtags__
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        #     good point: transparent support for inheritance levels >= 2
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        #     bad point: we loose the information of which tags are specific
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        #                to this entity class
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        classdict['__rtags__'] = tagdefs
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        classdict['widgets'] = widgets
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        eclass = super(metaentity, mcs).__new__(mcs, name, bases, classdict)
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        # adds the "rtags" attribute
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        eclass.rtags = RelationTags(eclass, tagdefs)
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        return eclass
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class Entity(AppRsetObject, dict):
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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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    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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    :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()
0
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    widgets = {}
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    id = None
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    e_schema = None
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    eid = None
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    rest_attr = None
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    skip_copy_for = ()
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    @classmethod
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    def registered(cls, registry):
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        """build class using descriptor at registration time"""
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        assert cls.id is not None
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        super(Entity, cls).registered(registry)
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        if cls.id != 'Any':
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            cls.__initialize__()
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        return cls
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   243
                
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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, _, x in eschema.relation_definitions():
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            if (rschema, x) in MI_REL_TRIGGERS:
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                mixin = MI_REL_TRIGGERS[(rschema, x)]
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   262
                if not (issubclass(cls, mixin) or mixin in mixins): # already mixed ?
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                    mixins.append(mixin)
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   264
                for iface in getattr(mixin, '__implements__', ()):
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   265
                    if not interface.implements(cls, iface):
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                        interface.extend(cls, iface)
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   267
            if x == 'subject':
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   268
                setattr(cls, rschema.type, SubjectRelation(rschema))
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   269
            else:
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   270
                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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        cls.rtags.__initialize__()
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   276
    
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    @classmethod
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   278
    def fetch_rql(cls, user, restriction=None, fetchattrs=None, mainvar='X',
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   279
                  settype=True, ordermethod='fetch_order'):
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   280
        """return a rql to fetch all entities of the class type"""
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   281
        restrictions = restriction or []
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   282
        if settype:
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   283
            restrictions.append('%s is %s' % (mainvar, cls.id))
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   284
        if fetchattrs is None:
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   285
            fetchattrs = cls.fetch_attrs
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   286
        selection = [mainvar]
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   287
        orderby = []
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   288
        # start from 26 to avoid possible conflicts with X
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   289
        varmaker = rqlvar_maker(index=26)
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   290
        cls._fetch_restrictions(mainvar, varmaker, fetchattrs, selection,
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   291
                                orderby, restrictions, user, ordermethod)
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   292
        rql = 'Any %s' % ','.join(selection)
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   293
        if orderby:
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   294
            rql +=  ' ORDERBY %s' % ','.join(orderby)
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   295
        rql += ' WHERE %s' % ', '.join(restrictions)
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   296
        return rql
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   297
    
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   298
    @classmethod
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   299
    def _fetch_restrictions(cls, mainvar, varmaker, fetchattrs,
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   300
                            selection, orderby, restrictions, user,
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   301
                            ordermethod='fetch_order', visited=None):
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   302
        eschema = cls.e_schema
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   303
        if visited is None:
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   304
            visited = set((eschema.type,))
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diff changeset
   305
        elif eschema.type in visited:
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diff changeset
   306
            # avoid infinite recursion
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diff changeset
   307
            return
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diff changeset
   308
        else:
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diff changeset
   309
            visited.add(eschema.type)
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   310
        _fetchattrs = []
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   311
        for attr in fetchattrs:
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   312
            try:
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   313
                rschema = eschema.subject_relation(attr)
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diff changeset
   314
            except KeyError:
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diff changeset
   315
                cls.warning('skipping fetch_attr %s defined in %s (not found in schema)',
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   316
                            attr, cls.id)
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   317
                continue
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diff changeset
   318
            if not user.matching_groups(rschema.get_groups('read')):
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diff changeset
   319
                continue
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diff changeset
   320
            var = varmaker.next()
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diff changeset
   321
            selection.append(var)
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   322
            restriction = '%s %s %s' % (mainvar, attr, var)
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   323
            restrictions.append(restriction)
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diff changeset
   324
            if not rschema.is_final():
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   325
                # XXX this does not handle several destination types
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diff changeset
   326
                desttype = rschema.objects(eschema.type)[0]
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   327
                card = rschema.rproperty(eschema, desttype, 'cardinality')[0]
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diff changeset
   328
                if card not in '?1':
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diff changeset
   329
                    selection.pop()
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diff changeset
   330
                    restrictions.pop()
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diff changeset
   331
                    continue
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parents:
diff changeset
   332
                if card == '?':
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diff changeset
   333
                    restrictions[-1] += '?' # left outer join if not mandatory
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diff changeset
   334
                destcls = cls.vreg.etype_class(desttype)
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diff changeset
   335
                destcls._fetch_restrictions(var, varmaker, destcls.fetch_attrs,
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diff changeset
   336
                                            selection, orderby, restrictions,
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diff changeset
   337
                                            user, ordermethod, visited=visited)
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diff changeset
   338
            orderterm = getattr(cls, ordermethod)(attr, var)
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diff changeset
   339
            if orderterm:
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diff changeset
   340
                orderby.append(orderterm)
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diff changeset
   341
        return selection, orderby, restrictions
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diff changeset
   342
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   343
    def __init__(self, req, rset, row=None, col=0):
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diff changeset
   344
        AppRsetObject.__init__(self, req, rset)
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diff changeset
   345
        dict.__init__(self)
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diff changeset
   346
        self.row, self.col = row, col
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diff changeset
   347
        self._related_cache = {}
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diff changeset
   348
        if rset is not None:
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diff changeset
   349
            self.eid = rset[row][col]
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diff changeset
   350
        else:
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diff changeset
   351
            self.eid = None
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diff changeset
   352
        self._is_saved = True
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diff changeset
   353
        
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   354
    def __repr__(self):
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diff changeset
   355
        return '<Entity %s %s %s at %s>' % (
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diff changeset
   356
            self.e_schema, self.eid, self.keys(), id(self))
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diff changeset
   357
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diff changeset
   358
    def __nonzero__(self):
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diff changeset
   359
        return True
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diff changeset
   360
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diff changeset
   361
    def __hash__(self):
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diff changeset
   362
        return id(self)
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diff changeset
   363
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diff changeset
   364
    def pre_add_hook(self):
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diff changeset
   365
        """hook called by the repository before doing anything to add the entity
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diff changeset
   366
        (before_add entity hooks have not been called yet). This give the
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diff changeset
   367
        occasion to do weird stuff such as autocast (File -> Image for instance).
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diff changeset
   368
        
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diff changeset
   369
        This method must return the actual entity to be added.
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diff changeset
   370
        """
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diff changeset
   371
        return self
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parents:
diff changeset
   372
    
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diff changeset
   373
    def set_eid(self, eid):
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diff changeset
   374
        self.eid = self['eid'] = eid
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parents:
diff changeset
   375
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diff changeset
   376
    def has_eid(self):
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diff changeset
   377
        """return True if the entity has an attributed eid (False
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diff changeset
   378
        meaning that the entity has to be created
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diff changeset
   379
        """
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diff changeset
   380
        try:
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diff changeset
   381
            int(self.eid)
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diff changeset
   382
            return True
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
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diff changeset
   383
        except (ValueError, TypeError):
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parents:
diff changeset
   384
            return False
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parents:
diff changeset
   385
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diff changeset
   386
    def is_saved(self):
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diff changeset
   387
        """during entity creation, there is some time during which the entity
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diff changeset
   388
        has an eid attributed though it's not saved (eg during before_add_entity
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parents:
diff changeset
   389
        hooks). You can use this method to ensure the entity has an eid *and* is
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   390
        saved in its source.
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   391
        """
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   392
        return self.has_eid() and self._is_saved
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parents:
diff changeset
   393
    
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   394
    @cached
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   395
    def metainformation(self):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   396
        res = dict(zip(('type', 'source', 'extid'), self.req.describe(self.eid)))
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   397
        res['source'] = self.req.source_defs()[res['source']]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   398
        return res
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   399
475
b32a5772ff06 should clear local perm cache if first attempt failed
sylvain.thenault@logilab.fr
parents: 413
diff changeset
   400
    def clear_local_perm_cache(self, action):
b32a5772ff06 should clear local perm cache if first attempt failed
sylvain.thenault@logilab.fr
parents: 413
diff changeset
   401
        for rqlexpr in self.e_schema.get_rqlexprs(action):
b32a5772ff06 should clear local perm cache if first attempt failed
sylvain.thenault@logilab.fr
parents: 413
diff changeset
   402
            self.req.local_perm_cache.pop((rqlexpr.eid, (('x', self.eid),)), None)
b32a5772ff06 should clear local perm cache if first attempt failed
sylvain.thenault@logilab.fr
parents: 413
diff changeset
   403
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   404
    def check_perm(self, action):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   405
        self.e_schema.check_perm(self.req, action, self.eid)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   406
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   407
    def has_perm(self, action):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   408
        return self.e_schema.has_perm(self.req, action, self.eid)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   409
        
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   410
    def view(self, vid, __registry='views', **kwargs):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   411
        """shortcut to apply a view on this entity"""
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   412
        return self.vreg.render(__registry, vid, self.req, rset=self.rset,
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   413
                                row=self.row, col=self.col, **kwargs)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   414
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   415
    def absolute_url(self, method=None, **kwargs):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   416
        """return an absolute url to view this entity"""
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   417
        # in linksearch mode, we don't want external urls else selecting
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   418
        # the object for use in the relation is tricky
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   419
        # XXX search_state is web specific
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   420
        if getattr(self.req, 'search_state', ('normal',))[0] == 'normal':
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   421
            kwargs['base_url'] = self.metainformation()['source'].get('base-url')
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   422
        if method is None or method == 'view':
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   423
            kwargs['_restpath'] = self.rest_path()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   424
        else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   425
            kwargs['rql'] = 'Any X WHERE X eid %s' % self.eid
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   426
        return self.build_url(method, **kwargs)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   427
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   428
    def rest_path(self):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   429
        """returns a REST-like (relative) path for this entity"""
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   430
        mainattr, needcheck = self._rest_attr_info()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   431
        etype = str(self.e_schema)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   432
        if mainattr == 'eid':
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   433
            value = self.eid
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   434
        else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   435
            value = getattr(self, mainattr)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   436
            if value is None:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   437
                return '%s/eid/%s' % (etype.lower(), self.eid)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   438
        if needcheck:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   439
            # make sure url is not ambiguous
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   440
            rql = 'Any COUNT(X) WHERE X is %s, X %s %%(value)s' % (etype, mainattr)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   441
            if value is not None:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   442
                nbresults = self.req.execute(rql, {'value' : value})[0][0]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   443
                # may an assertion that nbresults is not 0 would be a good idea
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   444
                if nbresults != 1: # no ambiguity
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   445
                    return '%s/eid/%s' % (etype.lower(), self.eid)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   446
        return '%s/%s' % (etype.lower(), self.req.url_quote(value))
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   447
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   448
    @classmethod
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   449
    def _rest_attr_info(cls):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   450
        mainattr, needcheck = 'eid', True
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   451
        if cls.rest_attr:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   452
            mainattr = cls.rest_attr
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   453
            needcheck = not cls.e_schema.has_unique_values(mainattr)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   454
        else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   455
            for rschema in cls.e_schema.subject_relations():
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   456
                if rschema.is_final() and rschema != 'eid' and cls.e_schema.has_unique_values(rschema):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   457
                    mainattr = str(rschema)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   458
                    needcheck = False
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   459
                    break
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   460
        if mainattr == 'eid':
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   461
            needcheck = False
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   462
        return mainattr, needcheck
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   463
1101
0c067de38e46 unification of meta-attributes handling:
sylvain.thenault@logilab.fr
parents: 1098
diff changeset
   464
    def attribute_metadata(self, attr, metadata):
0c067de38e46 unification of meta-attributes handling:
sylvain.thenault@logilab.fr
parents: 1098
diff changeset
   465
        """return a metadata for an attribute (None if unspecified)"""
0c067de38e46 unification of meta-attributes handling:
sylvain.thenault@logilab.fr
parents: 1098
diff changeset
   466
        value = getattr(self, '%s_%s' % (attr, metadata), None)
0c067de38e46 unification of meta-attributes handling:
sylvain.thenault@logilab.fr
parents: 1098
diff changeset
   467
        if value is None and metadata == 'encoding':
0c067de38e46 unification of meta-attributes handling:
sylvain.thenault@logilab.fr
parents: 1098
diff changeset
   468
            value = self.vreg.property_value('ui.encoding')
0c067de38e46 unification of meta-attributes handling:
sylvain.thenault@logilab.fr
parents: 1098
diff changeset
   469
        return value
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   470
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   471
    def printable_value(self, attr, value=_marker, attrtype=None,
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   472
                        format='text/html', displaytime=True):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   473
        """return a displayable value (i.e. unicode string) which may contains
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   474
        html tags
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   475
        """
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   476
        attr = str(attr)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   477
        if value is _marker:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   478
            value = getattr(self, attr)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   479
        if isinstance(value, basestring):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   480
            value = value.strip()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   481
        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
   482
            return u''
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   483
        if attrtype is None:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   484
            attrtype = self.e_schema.destination(attr)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   485
        props = self.e_schema.rproperties(attr)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   486
        if attrtype == 'String':
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   487
            # internalinalized *and* formatted string such as schema
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   488
            # description...
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   489
            if props.get('internationalizable'):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   490
                value = self.req._(value)
1101
0c067de38e46 unification of meta-attributes handling:
sylvain.thenault@logilab.fr
parents: 1098
diff changeset
   491
            attrformat = self.attribute_metadata(attr, 'format')
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   492
            if attrformat:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   493
                return self.mtc_transform(value, attrformat, format,
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   494
                                          self.req.encoding)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   495
        elif attrtype == 'Bytes':
1101
0c067de38e46 unification of meta-attributes handling:
sylvain.thenault@logilab.fr
parents: 1098
diff changeset
   496
            attrformat = self.attribute_metadata(attr, 'format')
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   497
            if attrformat:
1101
0c067de38e46 unification of meta-attributes handling:
sylvain.thenault@logilab.fr
parents: 1098
diff changeset
   498
                encoding = self.attribute_metadata(attr, 'encoding')
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   499
                return self.mtc_transform(value.getvalue(), attrformat, format,
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   500
                                          encoding)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   501
            return u''
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   502
        value = printable_value(self.req, attrtype, value, props, displaytime)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   503
        if format == 'text/html':
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   504
            value = html_escape(value)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   505
        return value
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   506
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   507
    def mtc_transform(self, data, format, target_format, encoding,
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   508
                      _engine=ENGINE):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   509
        trdata = TransformData(data, format, encoding, appobject=self)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   510
        data = _engine.convert(trdata, target_format).decode()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   511
        if format == 'text/html':
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   512
            data = soup2xhtml(data, self.req.encoding)                
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   513
        return data
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   514
    
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   515
    # entity cloning ##########################################################
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   516
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   517
    def copy_relations(self, ceid):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   518
        """copy relations of the object with the given eid on this object
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   519
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   520
        By default meta and composite relations are skipped.
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   521
        Overrides this if you want another behaviour
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
        assert self.has_eid()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   524
        execute = self.req.execute
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   525
        for rschema in self.e_schema.subject_relations():
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   526
            if rschema.meta or rschema.is_final():
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   527
                continue
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   528
            # skip already defined relations
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   529
            if getattr(self, rschema.type):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   530
                continue
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   531
            if rschema.type in self.skip_copy_for:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   532
                continue
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   533
            if rschema.type == 'in_state':
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   534
                # if the workflow is defining an initial state (XXX AND we are
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   535
                # not in the managers group? not done to be more consistent)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   536
                # don't try to copy in_state
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   537
                if execute('Any S WHERE S state_of ET, ET initial_state S,'
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   538
                           'ET name %(etype)s', {'etype': str(self.e_schema)}):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   539
                    continue
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   540
            # skip composite relation
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   541
            if self.e_schema.subjrproperty(rschema, 'composite'):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   542
                continue
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   543
            # skip relation with card in ?1 else we either change the copied
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   544
            # object (inlined relation) or inserting some inconsistency
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   545
            if self.e_schema.subjrproperty(rschema, 'cardinality')[1] in '?1':
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   546
                continue
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   547
            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
   548
                rschema.type, rschema.type)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   549
            execute(rql, {'x': self.eid, 'y': ceid}, ('x', 'y'))
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   550
            self.clear_related_cache(rschema.type, 'subject')
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   551
        for rschema in self.e_schema.object_relations():
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   552
            if rschema.meta:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   553
                continue
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   554
            # skip already defined relations
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   555
            if getattr(self, 'reverse_%s' % rschema.type):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   556
                continue
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   557
            # skip composite relation
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   558
            if self.e_schema.objrproperty(rschema, 'composite'):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   559
                continue
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   560
            # skip relation with card in ?1 else we either change the copied
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   561
            # object (inlined relation) or inserting some inconsistency
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   562
            if self.e_schema.objrproperty(rschema, 'cardinality')[0] in '?1':
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   563
                continue
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   564
            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
   565
                rschema.type, rschema.type)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   566
            execute(rql, {'x': self.eid, 'y': ceid}, ('x', 'y'))
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   567
            self.clear_related_cache(rschema.type, 'object')
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   568
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   569
    # data fetching methods ###################################################
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
    @cached
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   572
    def as_rset(self):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   573
        """returns a resultset containing `self` information"""
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   574
        rset = ResultSet([(self.eid,)], 'Any X WHERE X eid %(x)s',
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   575
                         {'x': self.eid}, [(self.id,)])
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   576
        return self.req.decorate_rset(rset)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   577
                       
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   578
    def to_complete_relations(self):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   579
        """by default complete final relations to when calling .complete()"""
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   580
        for rschema in self.e_schema.subject_relations():
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   581
            if rschema.is_final():
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   582
                continue
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   583
            if len(rschema.objects(self.e_schema)) > 1:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   584
                # ambigous relations, the querier doesn't handle
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   585
                # outer join correctly in this case
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   586
                continue
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   587
            if rschema.inlined:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   588
                matching_groups = self.req.user.matching_groups
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   589
                if matching_groups(rschema.get_groups('read')) and \
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   590
                   all(matching_groups(es.get_groups('read'))
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   591
                       for es in rschema.objects(self.e_schema)):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   592
                    yield rschema, 'subject'
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   593
                    
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   594
    def to_complete_attributes(self, skip_bytes=True):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   595
        for rschema, attrschema in self.e_schema.attribute_definitions():
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   596
            # skip binary data by default
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   597
            if skip_bytes and attrschema.type == 'Bytes':
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   598
                continue
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   599
            attr = rschema.type
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   600
            if attr == 'eid':
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   601
                continue
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   602
            # password retreival is blocked at the repository server level
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   603
            if not self.req.user.matching_groups(rschema.get_groups('read')) \
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   604
                   or attrschema.type == 'Password':
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   605
                self[attr] = None
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   606
                continue
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   607
            yield attr
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   608
            
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   609
    def complete(self, attributes=None, skip_bytes=True):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   610
        """complete this entity by adding missing attributes (i.e. query the
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   611
        repository to fill the entity)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   612
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   613
        :type skip_bytes: bool
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   614
        :param skip_bytes:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   615
          if true, attribute of type Bytes won't be considered
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   616
        """
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   617
        assert self.has_eid()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   618
        varmaker = rqlvar_maker()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   619
        V = varmaker.next()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   620
        rql = ['WHERE %s eid %%(x)s' % V]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   621
        selected = []
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   622
        for attr in (attributes or self.to_complete_attributes(skip_bytes)):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   623
            # if attribute already in entity, nothing to do
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   624
            if self.has_key(attr):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   625
                continue
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   626
            # case where attribute must be completed, but is not yet in entity
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   627
            var = varmaker.next()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   628
            rql.append('%s %s %s' % (V, attr, var))
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   629
            selected.append((attr, var))
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   630
        # +1 since this doen't include the main variable
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   631
        lastattr = len(selected) + 1
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   632
        if attributes is None:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   633
            # fetch additional relations (restricted to 0..1 relations)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   634
            for rschema, role in self.to_complete_relations():
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   635
                rtype = rschema.type
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   636
                if self.relation_cached(rtype, role):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   637
                    continue
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   638
                var = varmaker.next()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   639
                if role == 'subject':
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   640
                    targettype = rschema.objects(self.e_schema)[0]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   641
                    card = rschema.rproperty(self.e_schema, targettype,
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   642
                                             'cardinality')[0]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   643
                    if card == '1':
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   644
                        rql.append('%s %s %s' % (V, rtype, var))
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   645
                    else: # '?"
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   646
                        rql.append('%s %s %s?' % (V, rtype, var))
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   647
                else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   648
                    targettype = rschema.subjects(self.e_schema)[1]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   649
                    card = rschema.rproperty(self.e_schema, targettype,
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   650
                                             'cardinality')[1]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   651
                    if card == '1':
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   652
                        rql.append('%s %s %s' % (var, rtype, V))
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
                        rql.append('%s? %s %s' % (var, rtype, V))
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   655
                assert card in '1?', '%s %s %s %s' % (self.e_schema, rtype,
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   656
                                                      role, card)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   657
                selected.append(((rtype, role), var))
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   658
        if selected:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   659
            # select V, we need it as the left most selected variable
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   660
            # if some outer join are included to fetch inlined relations
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   661
            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
   662
                                    ','.join(rql))
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   663
            execute = getattr(self.req, 'unsafe_execute', self.req.execute)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   664
            rset = execute(rql, {'x': self.eid}, 'x', build_descr=False)[0]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   665
            # handle attributes
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   666
            for i in xrange(1, lastattr):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   667
                self[str(selected[i-1][0])] = rset[i]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   668
            # handle relations
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   669
            for i in xrange(lastattr, len(rset)):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   670
                rtype, x = selected[i-1][0]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   671
                value = rset[i]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   672
                if value is None:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   673
                    rrset = ResultSet([], rql, {'x': self.eid})
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   674
                    self.req.decorate_rset(rrset)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   675
                else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   676
                    rrset = self.req.eid_rset(value)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   677
                self.set_related_cache(rtype, x, rrset)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   678
                
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   679
    def get_value(self, name):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   680
        """get value for the attribute relation <name>, query the repository
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   681
        to get the value if necessary.
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   682
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   683
        :type name: str
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   684
        :param name: name of the attribute to get
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   685
        """
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   686
        try:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   687
            value = self[name]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   688
        except KeyError:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   689
            if not self.is_saved():
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   690
                return None
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   691
            rql = "Any A WHERE X eid %%(x)s, X %s A" % name
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   692
            # XXX should we really use unsafe_execute here??
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   693
            execute = getattr(self.req, 'unsafe_execute', self.req.execute)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   694
            try:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   695
                rset = execute(rql, {'x': self.eid}, 'x')
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   696
            except Unauthorized:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   697
                self[name] = value = None
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   698
            else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   699
                assert rset.rowcount <= 1, (self, rql, rset.rowcount)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   700
                try:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   701
                    self[name] = value = rset.rows[0][0]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   702
                except IndexError:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   703
                    # probably a multisource error
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   704
                    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
   705
                                  name, self.eid)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   706
                    if self.e_schema.destination(name) == 'String':
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   707
                        self[name] = value = self.req._('unaccessible')
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   708
                    else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   709
                        self[name] = value = None
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   710
        return value
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   711
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   712
    def related(self, rtype, role='subject', limit=None, entities=False):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   713
        """returns a resultset of related entities
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   714
        
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   715
        :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
   716
        :param limit: resultset's maximum size
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   717
        :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
   718
        """
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   719
        try:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   720
            return self.related_cache(rtype, role, entities, limit)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   721
        except KeyError:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   722
            pass
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   723
        assert self.has_eid()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   724
        rql = self.related_rql(rtype, role)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   725
        rset = self.req.execute(rql, {'x': self.eid}, 'x')
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   726
        self.set_related_cache(rtype, role, rset)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   727
        return self.related(rtype, role, limit, entities)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   728
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   729
    def related_rql(self, rtype, role='subject'):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   730
        rschema = self.schema[rtype]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   731
        if role == 'subject':
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   732
            targettypes = rschema.objects(self.e_schema)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   733
            restriction = 'E eid %%(x)s, E %s X' % rtype
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   734
            card = greater_card(rschema, (self.e_schema,), targettypes, 0)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   735
        else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   736
            targettypes = rschema.subjects(self.e_schema)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   737
            restriction = 'E eid %%(x)s, X %s E' % rtype
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   738
            card = greater_card(rschema, targettypes, (self.e_schema,), 1)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   739
        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
   740
            fetchattrs_list = []
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   741
            for ttype in targettypes:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   742
                etypecls = self.vreg.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
   743
                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
   744
            fetchattrs = reduce(set.intersection, fetchattrs_list)
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   745
            rql = etypecls.fetch_rql(self.req.user, [restriction], fetchattrs,
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   746
                                     settype=False)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   747
        else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   748
            etypecls = self.vreg.etype_class(targettypes[0])
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   749
            rql = etypecls.fetch_rql(self.req.user, [restriction], settype=False)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   750
        # optimisation: remove ORDERBY if cardinality is 1 or ? (though
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   751
        # greater_card return 1 for those both cases)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   752
        if card == '1':
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   753
            if ' ORDERBY ' in rql:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   754
                rql = '%s WHERE %s' % (rql.split(' ORDERBY ', 1)[0],
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   755
                                       rql.split(' WHERE ', 1)[1])
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   756
        elif not ' ORDERBY ' in rql:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   757
            args = tuple(rql.split(' WHERE ', 1))
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   758
            rql = '%s ORDERBY Z DESC WHERE X modification_date Z, %s' % args
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   759
        return rql
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   760
    
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   761
    # generic vocabulary methods ##############################################
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   762
1008
f54b4309a3f5 bw compat for vocabulary using new form
sylvain.thenault@logilab.fr
parents: 985
diff changeset
   763
    @obsolete('see new form api')
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   764
    def vocabulary(self, rtype, role='subject', limit=None):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   765
        """vocabulary functions must return a list of couples
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   766
        (label, eid) that will typically be used to fill the
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   767
        edition view's combobox.
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   768
        
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   769
        If `eid` is None in one of these couples, it should be
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   770
        interpreted as a separator in case vocabulary results are grouped
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   771
        """
1008
f54b4309a3f5 bw compat for vocabulary using new form
sylvain.thenault@logilab.fr
parents: 985
diff changeset
   772
        from cubicweb.web.form import EntityFieldsForm
f54b4309a3f5 bw compat for vocabulary using new form
sylvain.thenault@logilab.fr
parents: 985
diff changeset
   773
        from logilab.common.testlib import mock_object
f54b4309a3f5 bw compat for vocabulary using new form
sylvain.thenault@logilab.fr
parents: 985
diff changeset
   774
        form = EntityFieldsForm(self.req, entity=self)
f54b4309a3f5 bw compat for vocabulary using new form
sylvain.thenault@logilab.fr
parents: 985
diff changeset
   775
        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
   776
        return form.form_field_vocabulary(field, limit)
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   777
            
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   778
    def unrelated_rql(self, rtype, targettype, role, ordermethod=None,
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   779
                      vocabconstraints=True):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   780
        """build a rql to fetch `targettype` entities unrelated to this entity
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   781
        using (rtype, role) relation
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   782
        """
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   783
        ordermethod = ordermethod or 'fetch_unrelated_order'
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   784
        if isinstance(rtype, basestring):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   785
            rtype = self.schema.rschema(rtype)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   786
        if role == 'subject':
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   787
            evar, searchedvar = 'S', 'O'
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   788
            subjtype, objtype = self.e_schema, targettype
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   789
        else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   790
            searchedvar, evar = 'S', 'O'
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   791
            objtype, subjtype = self.e_schema, targettype
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   792
        if self.has_eid():
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   793
            restriction = ['NOT S %s O' % rtype, '%s eid %%(x)s' % evar]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   794
        else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   795
            restriction = []
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   796
        constraints = rtype.rproperty(subjtype, objtype, 'constraints')
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   797
        if vocabconstraints:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   798
            # RQLConstraint is a subclass for RQLVocabularyConstraint, so they
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   799
            # will be included as well
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   800
            restriction += [cstr.restriction for cstr in constraints
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   801
                            if isinstance(cstr, RQLVocabularyConstraint)]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   802
        else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   803
            restriction += [cstr.restriction for cstr in constraints
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   804
                            if isinstance(cstr, RQLConstraint)]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   805
        etypecls = self.vreg.etype_class(targettype)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   806
        rql = etypecls.fetch_rql(self.req.user, restriction,
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   807
                                 mainvar=searchedvar, ordermethod=ordermethod)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   808
        # ensure we have an order defined
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   809
        if not ' ORDERBY ' in rql:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   810
            before, after = rql.split(' WHERE ', 1)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   811
            rql = '%s ORDERBY %s WHERE %s' % (before, searchedvar, after)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   812
        return rql
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   813
    
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   814
    def unrelated(self, rtype, targettype, role='subject', limit=None,
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   815
                  ordermethod=None):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   816
        """return a result set of target type objects that may be related
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   817
        by a given relation, with self as subject or object
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
        rql = self.unrelated_rql(rtype, targettype, role, ordermethod)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   820
        if limit is not None:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   821
            before, after = rql.split(' WHERE ', 1)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   822
            rql = '%s LIMIT %s WHERE %s' % (before, limit, after)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   823
        if self.has_eid():
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   824
            return self.req.execute(rql, {'x': self.eid})
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   825
        return self.req.execute(rql)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   826
        
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   827
    # relations cache handling ################################################
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   828
    
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   829
    def relation_cached(self, rtype, role):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   830
        """return true if the given relation is already cached on the instance
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   831
        """
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   832
        return '%s_%s' % (rtype, role) in self._related_cache
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   833
    
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   834
    def related_cache(self, rtype, role, entities=True, limit=None):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   835
        """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
   836
        else raise `KeyError`
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   837
        """
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   838
        res = self._related_cache['%s_%s' % (rtype, role)][entities]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   839
        if limit:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   840
            if entities:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   841
                res = res[:limit]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   842
            else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   843
                res = res.limit(limit)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   844
        return res
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   845
    
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   846
    def set_related_cache(self, rtype, role, rset, col=0):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   847
        """set cached values for the given relation"""
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   848
        if rset:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   849
            related = list(rset.entities(col))
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   850
            rschema = self.schema.rschema(rtype)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   851
            if role == 'subject':
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   852
                rcard = rschema.rproperty(self.e_schema, related[0].e_schema,
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   853
                                          'cardinality')[1]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   854
                target = 'object'
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   855
            else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   856
                rcard = rschema.rproperty(related[0].e_schema, self.e_schema,
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   857
                                          'cardinality')[0]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   858
                target = 'subject'
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   859
            if rcard in '?1':
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   860
                for rentity in related:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   861
                    rentity._related_cache['%s_%s' % (rtype, target)] = (self.as_rset(), [self])
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   862
        else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   863
            related = []
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   864
        self._related_cache['%s_%s' % (rtype, role)] = (rset, related)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   865
        
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   866
    def clear_related_cache(self, rtype=None, role=None):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   867
        """clear cached values for the given relation or the entire cache if
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   868
        no relation is given
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   869
        """
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   870
        if rtype is None:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   871
            self._related_cache = {}
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   872
        else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   873
            assert role
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   874
            self._related_cache.pop('%s_%s' % (rtype, role), None)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   875
        
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   876
    # raw edition utilities ###################################################
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   877
    
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   878
    def set_attributes(self, **kwargs):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   879
        assert kwargs
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   880
        relations = []
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   881
        for key in kwargs:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   882
            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
   883
        # 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
   884
        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
   885
        # and now update the database
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   886
        kwargs['x'] = self.eid
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   887
        self.req.execute('SET %s WHERE X eid %%(x)s' % ','.join(relations),
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   888
                         kwargs, 'x')
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   889
            
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   890
    def delete(self):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   891
        assert self.has_eid(), self.eid
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   892
        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
   893
                         {'x': self.eid})
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
    # server side utilities ###################################################
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   896
        
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   897
    def set_defaults(self):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   898
        """set default values according to the schema"""
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   899
        self._default_set = set()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   900
        for attr, value in self.e_schema.defaults():
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   901
            if not self.has_key(attr):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   902
                self[str(attr)] = value
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   903
                self._default_set.add(attr)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   904
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   905
    def check(self, creation=False):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   906
        """check this entity against its schema. Only final relation
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   907
        are checked here, constraint on actual relations are checked in hooks
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   908
        """
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   909
        # necessary since eid is handled specifically and yams require it to be
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   910
        # in the dictionary
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   911
        if self.req is None:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   912
            _ = unicode
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   913
        else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   914
            _ = self.req._
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   915
        self.e_schema.check(self, creation=creation, _=_)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   916
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   917
    def fti_containers(self, _done=None):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   918
        if _done is None:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   919
            _done = set()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   920
        _done.add(self.eid)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   921
        containers = tuple(self.e_schema.fulltext_containers())
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   922
        if containers:
476
62968fa8845c yield self if no ft container found
sylvain.thenault@logilab.fr
parents: 475
diff changeset
   923
            yielded = False
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   924
            for rschema, target in containers:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   925
                if target == 'object':
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   926
                    targets = getattr(self, rschema.type)
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
                    targets = getattr(self, 'reverse_%s' % rschema)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   929
                for entity in targets:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   930
                    if entity.eid in _done:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   931
                        continue
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   932
                    for container in entity.fti_containers(_done):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   933
                        yield container
476
62968fa8845c yield self if no ft container found
sylvain.thenault@logilab.fr
parents: 475
diff changeset
   934
                        yielded = True
62968fa8845c yield self if no ft container found
sylvain.thenault@logilab.fr
parents: 475
diff changeset
   935
            if not yielded:
62968fa8845c yield self if no ft container found
sylvain.thenault@logilab.fr
parents: 475
diff changeset
   936
                yield self
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   937
        else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   938
            yield self
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   939
                    
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   940
    def get_words(self):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   941
        """used by the full text indexer to get words to index
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   942
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   943
        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
   944
        on the indexer package
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   945
        
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   946
        :rtype: list
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   947
        :return: the list of indexable word of this entity
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   948
        """
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   949
        from indexer.query_objects import tokenize
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   950
        words = []
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   951
        for rschema in self.e_schema.indexable_attributes():
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   952
            try:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   953
                value = self.printable_value(rschema, format='text/plain')
1132
96752791c2b6 pylint cleanup
sylvain.thenault@logilab.fr
parents: 1101
diff changeset
   954
            except TransformError:
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   955
                continue
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   956
            except:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   957
                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
   958
                               rschema, self.eid)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   959
                continue
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   960
            if value:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   961
                words += tokenize(value)
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
        for rschema, role in self.e_schema.fulltext_relations():
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   964
            if role == 'subject':
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   965
                for entity in getattr(self, rschema.type):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   966
                    words += entity.get_words()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   967
            else: # if role == 'object':
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   968
                for entity in getattr(self, 'reverse_%s' % rschema.type):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   969
                    words += entity.get_words()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   970
        return words
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
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   973
# attribute and relation descriptors ##########################################
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   974
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   975
class Attribute(object):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   976
    """descriptor that controls schema attribute access"""
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   977
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   978
    def __init__(self, attrname):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   979
        assert attrname != 'eid'
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   980
        self._attrname = attrname
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
    def __get__(self, eobj, eclass):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   983
        if eobj is None:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   984
            return self
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   985
        return eobj.get_value(self._attrname)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   986
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   987
    def __set__(self, eobj, value):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   988
        # XXX bw compat
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   989
        # would be better to generate UPDATE queries than the current behaviour
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   990
        eobj.warning("deprecated usage, don't use 'entity.attr = val' notation)")
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   991
        eobj[self._attrname] = value
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   992
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   993
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   994
class Relation(object):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   995
    """descriptor that controls schema relation access"""
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   996
    _role = None # for pylint
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   997
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   998
    def __init__(self, rschema):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   999
        self._rschema = rschema
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1000
        self._rtype = rschema.type
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1001
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1002
    def __get__(self, eobj, eclass):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1003
        if eobj is None:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1004
            raise AttributeError('%s cannot be only be accessed from instances'
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1005
                                 % self._rtype)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1006
        return eobj.related(self._rtype, self._role, entities=True)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1007
    
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1008
    def __set__(self, eobj, value):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1009
        raise NotImplementedError
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1010
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1011
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1012
class SubjectRelation(Relation):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1013
    """descriptor that controls schema relation access"""
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1014
    _role = 'subject'
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1015
    
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1016
class ObjectRelation(Relation):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1017
    """descriptor that controls schema relation access"""
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1018
    _role = 'object'
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1019
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1020
from logging import getLogger
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1021
from cubicweb import set_log_methods
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
  1022
set_log_methods(Entity, getLogger('cubicweb.entity'))