entities/__init__.py
author Sylvain Thénault <sylvain.thenault@logilab.fr>
Wed, 29 Sep 2010 12:17:26 +0200
branchstable
changeset 6360 1edfc0f3bb1d
parent 5557 1a534c596bff
child 6039 6e84db1b3e44
permissions -rw-r--r--
[selector] cleanup
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# copyright 2003-2010 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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# This file is part of CubicWeb.
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#
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# CubicWeb is free software: you can redistribute it and/or modify it under the
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# terms of the GNU Lesser General Public License as published by the Free
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# Software Foundation, either version 2.1 of the License, or (at your option)
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# any later version.
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#
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# CubicWeb is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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# FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
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# details.
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#
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# You should have received a copy of the GNU Lesser General Public License along
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# with CubicWeb.  If not, see <http://www.gnu.org/licenses/>.
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"""base application's entities class implementation: `AnyEntity`"""
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__docformat__ = "restructuredtext en"
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from warnings import warn
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from logilab.common.deprecation import deprecated
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from logilab.common.decorators import cached
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from cubicweb import Unauthorized, typed_eid
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from cubicweb.entity import Entity
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class AnyEntity(Entity):
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    """an entity instance has e_schema automagically set on the class and
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    instances have access to their issuing cursor
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    """
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    __regid__ = 'Any'
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    __implements__ = ()
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    # meta data api ###########################################################
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    def dc_title(self):
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        """return a suitable *unicode* title for this entity"""
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        for rschema, attrschema in self.e_schema.attribute_definitions():
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            if rschema.meta:
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                continue
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            value = self.cw_attr_value(rschema.type)
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            if value:
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                # make the value printable (dates, floats, bytes, etc.)
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                return self.printable_value(rschema.type, value, attrschema.type,
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                                            format='text/plain')
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        return u'%s #%s' % (self.dc_type(), self.eid)
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    def dc_long_title(self):
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        """return a more detailled title for this entity"""
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        return self.dc_title()
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0
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    def dc_description(self, format='text/plain'):
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        """return a suitable description for this entity"""
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        if 'description' in self.e_schema.subjrels:
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            return self.printable_value('description', format=format)
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        return u''
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    def dc_authors(self):
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        """return a suitable description for the author(s) of the entity"""
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        try:
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            return ', '.join(u.name() for u in self.owned_by)
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        except Unauthorized:
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            return u''
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    def dc_creator(self):
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        """return a suitable description for the creator of the entity"""
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        if self.creator:
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            return self.creator.name()
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        return u''
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    def dc_date(self, date_format=None):# XXX default to ISO 8601 ?
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        """return latest modification date of this entity"""
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        return self._cw.format_date(self.modification_date, date_format=date_format)
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    def dc_type(self, form=''):
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        """return the display name for the type of this entity (translated)"""
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        return self.e_schema.display_name(self._cw, form)
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    def dc_language(self):
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        """return language used by this entity (translated)"""
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        # check if entities has internationalizable attributes
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        # XXX one is enough or check if all String attributes are internationalizable?
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        for rschema, attrschema in self.e_schema.attribute_definitions():
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            if rschema.rdef(self.e_schema, attrschema).internationalizable:
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                return self._cw._(self._cw.user.property_value('ui.language'))
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        return self._cw._(self._cw.vreg.property_value('ui.language'))
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0
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    @property
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    def creator(self):
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        """return the CWUser entity which has created this entity, or None if
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        unknown or if the curent user doesn't has access to this euser
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        """
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        try:
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            return self.created_by[0]
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        except (Unauthorized, IndexError):
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            return None
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    # abstractions making the whole things (well, some at least) working ######
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0
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    def sortvalue(self, rtype=None):
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        """return a value which can be used to sort this entity or given
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        entity's attribute
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        """
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        if rtype is None:
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            return self.dc_title().lower()
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        value = self.cw_attr_value(rtype)
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        # do not restrict to `unicode` because Bytes will return a `str` value
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        if isinstance(value, basestring):
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            return self.printable_value(rtype, format='text/plain').lower()
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        return value
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    # edition helper functions ################################################
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    def linked_to(self, rtype, role, remove=True):
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        """if entity should be linked to another using __linkto form param for
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        the given relation/role, return eids of related entities
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        This method is consuming matching link-to information from form params
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        if `remove` is True (by default).
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        """
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        try:
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            return self.__linkto[(rtype, role)]
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        except AttributeError:
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            self.__linkto = {}
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        except KeyError:
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            pass
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        linktos = list(self._cw.list_form_param('__linkto'))
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        linkedto = []
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        for linkto in linktos[:]:
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            ltrtype, eid, ltrole = linkto.split(':')
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            if rtype == ltrtype and role == ltrole:
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                # delete __linkto from form param to avoid it being added as
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                # hidden input
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                if remove:
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                    linktos.remove(linkto)
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                    self._cw.form['__linkto'] = linktos
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                linkedto.append(typed_eid(eid))
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        self.__linkto[(rtype, role)] = linkedto
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        return linkedto
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    # server side helpers #####################################################
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0
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# XXX:  store a reference to the AnyEntity class since it is hijacked in goa
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#       configuration and we need the actual reference to avoid infinite loops
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#       in mro
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ANYENTITY = AnyEntity
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def fetch_config(fetchattrs, mainattr=None, pclass=AnyEntity, order='ASC'):
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    if pclass is ANYENTITY:
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        pclass = AnyEntity # AnyEntity and ANYENTITY may be different classes
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    if pclass is not None:
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        fetchattrs += pclass.fetch_attrs
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    if mainattr is None:
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        mainattr = fetchattrs[0]
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    @classmethod
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    def fetch_order(cls, attr, var):
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        if attr == mainattr:
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            return '%s %s' % (var, order)
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        return None
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    return fetchattrs, fetch_order