web/box.py
author Julien Jehannet <julien.jehannet@logilab.fr>
Thu, 22 Apr 2010 17:04:51 +0200
changeset 5373 24a873060692
parent 5223 6abd6e3599f4
child 5423 e15abfdcce38
permissions -rw-r--r--
[selector] allow inplace operator in selector computation Intended to facilitate overriding of existing selectors chain in view declaration. It make the code shorter and clearer when you've to import long module pathnames
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"""abstract box classes for CubicWeb web client
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:organization: Logilab
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:copyright: 2001-2010 LOGILAB S.A. (Paris, FRANCE), license is LGPL v2.
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:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr
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:license: GNU Lesser General Public License, v2.1 - http://www.gnu.org/licenses
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"""
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__docformat__ = "restructuredtext en"
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_ = unicode
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from logilab.mtconverter import xml_escape
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from cubicweb import Unauthorized, role as get_role, target as get_target
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from cubicweb.schema import display_name
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from cubicweb.selectors import (no_cnx, one_line_rset,  primary_view,
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                                match_context_prop, partial_has_related_entities)
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from cubicweb.view import View, ReloadableMixIn
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from cubicweb.web import INTERNAL_FIELD_VALUE
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from cubicweb.web.htmlwidgets import (BoxLink, BoxWidget, SideBoxWidget,
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                                      RawBoxItem, BoxSeparator)
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from cubicweb.web.action import UnregisteredAction
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class BoxTemplate(View):
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    """base template for boxes, usually a (contextual) list of possible
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    actions. Various classes attributes may be used to control the box
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    rendering.
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    You may override on of the formatting callbacks is this is not necessary
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    for your custom box.
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    Classes inheriting from this class usually only have to override call
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    to fetch desired actions, and then to do something like  ::
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        box.render(self.w)
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    """
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    __registry__ = 'boxes'
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    __select__ = ~no_cnx() & match_context_prop()
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    categories_in_order = ()
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    cw_property_defs = {
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        _('visible'): dict(type='Boolean', default=True,
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                           help=_('display the box or not')),
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        _('order'):   dict(type='Int', default=99,
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                           help=_('display order of the box')),
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        # XXX 'incontext' boxes are handled by the default primary view
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        _('context'): dict(type='String', default='left',
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                           vocabulary=(_('left'), _('incontext'), _('right')),
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                           help=_('context where this box should be displayed')),
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        }
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    context = 'left'
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    htmlitemclass = 'boxItem'
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    def sort_actions(self, actions):
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        """return a list of (category, actions_sorted_by_title)"""
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        result = []
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        actions_by_cat = {}
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        for action in actions:
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            actions_by_cat.setdefault(action.category, []).append(
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                (action.title, action) )
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        for key, values in actions_by_cat.items():
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            actions_by_cat[key] = [act for title, act in sorted(values)]
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        for cat in self.categories_in_order:
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            if cat in actions_by_cat:
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                result.append( (cat, actions_by_cat[cat]) )
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        for item in sorted(actions_by_cat.items()):
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            result.append(item)
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        return result
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    def mk_action(self, title, path, escape=True, **kwargs):
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        """factory function to create dummy actions compatible with the
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        .format_actions method
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        """
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        if escape:
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            title = xml_escape(title)
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        return self.box_action(self._action(title, path, **kwargs))
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    def _action(self, title, path, **kwargs):
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        return UnregisteredAction(self._cw, self.cw_rset, title, path, **kwargs)
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    # formating callbacks
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    def boxitem_link_tooltip(self, action):
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        if action.__regid__:
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            return u'keyword: %s' % action.__regid__
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        return u''
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    def box_action(self, action):
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        cls = getattr(action, 'html_class', lambda: None)() or self.htmlitemclass
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        return BoxLink(action.url(), self._cw._(action.title),
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                       cls, self.boxitem_link_tooltip(action))
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class RQLBoxTemplate(BoxTemplate):
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    """abstract box for boxes displaying the content of a rql query not
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    related to the current result set.
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    It rely on etype, rtype (both optional, usable to control registration
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    according to application schema and display according to connected
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    user's rights) and rql attributes
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    """
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    rql  = None
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    def to_display_rql(self):
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        assert self.rql is not None, self.__regid__
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        return (self.rql,)
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    def call(self, **kwargs):
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        try:
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            rset = self._cw.execute(*self.to_display_rql())
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        except Unauthorized:
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            # can't access to something in the query, forget this box
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            return
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        if len(rset) == 0:
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            return
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        box = BoxWidget(self._cw._(self.title), self.__regid__)
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        for i, (teid, tname) in enumerate(rset):
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            entity = rset.get_entity(i, 0)
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            box.append(self.mk_action(tname, entity.absolute_url()))
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        box.render(w=self.w)
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class UserRQLBoxTemplate(RQLBoxTemplate):
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    """same as rql box template but the rql is build using the eid of the
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    request's user
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    """
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    def to_display_rql(self):
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        assert self.rql is not None, self.__regid__
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        return (self.rql, {'x': self._cw.user.eid}, 'x')
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class EntityBoxTemplate(BoxTemplate):
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    """base class for boxes related to a single entity"""
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    __select__ = BoxTemplate.__select__ & one_line_rset() & primary_view()
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    context = 'incontext'
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    def call(self, row=0, col=0, **kwargs):
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        """classes inheriting from EntityBoxTemplate should define cell_call"""
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        self.cell_call(row, col, **kwargs)
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class RelatedEntityBoxTemplate(EntityBoxTemplate):
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    __select__ = EntityBoxTemplate.__select__ & partial_has_related_entities()
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    def cell_call(self, row, col, **kwargs):
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        entity = self.cw_rset.get_entity(row, col)
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        limit = self._cw.property_value('navigation.related-limit') + 1
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        role = get_role(self)
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        self.w(u'<div class="sideBox">')
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        self.wview('sidebox', entity.related(self.rtype, role, limit=limit),
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                   title=display_name(self._cw, self.rtype, role))
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        self.w(u'</div>')
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class EditRelationBoxTemplate(ReloadableMixIn, EntityBoxTemplate):
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    """base class for boxes which let add or remove entities linked
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    by a given relation
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    subclasses should define at least id, rtype and target
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    class attributes.
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    """
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    def cell_call(self, row, col, view=None, **kwargs):
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        self._cw.add_js('cubicweb.ajax.js')
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        entity = self.cw_rset.get_entity(row, col)
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        box = SideBoxWidget(display_name(self._cw, self.rtype), self.__regid__)
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        related = self.related_boxitems(entity)
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        unrelated = self.unrelated_boxitems(entity)
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        box.extend(related)
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        if related and unrelated:
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            box.append(BoxSeparator())
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        box.extend(unrelated)
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        box.render(self.w)
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    def div_id(self):
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        return self.__regid__
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    def box_item(self, entity, etarget, rql, label):
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        """builds HTML link to edit relation between `entity` and `etarget`
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        """
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        role, target = get_role(self), get_target(self)
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        args = {role[0] : entity.eid, target[0] : etarget.eid}
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        url = self._cw.user_rql_callback((rql, args))
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        # for each target, provide a link to edit the relation
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        label = u'[<a href="%s">%s</a>] %s' % (xml_escape(url), label,
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                                               etarget.view('incontext'))
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        return RawBoxItem(label, liclass=u'invisible')
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    def related_boxitems(self, entity):
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        rql = 'DELETE S %s O WHERE S eid %%(s)s, O eid %%(o)s' % self.rtype
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        related = []
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        for etarget in self.related_entities(entity):
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            related.append(self.box_item(entity, etarget, rql, u'-'))
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        return related
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    def unrelated_boxitems(self, entity):
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        rql = 'SET S %s O WHERE S eid %%(s)s, O eid %%(o)s' % self.rtype
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        unrelated = []
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        for etarget in self.unrelated_entities(entity):
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            unrelated.append(self.box_item(entity, etarget, rql, u'+'))
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        return unrelated
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    def related_entities(self, entity):
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        return entity.related(self.rtype, get_role(self), entities=True)
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    def unrelated_entities(self, entity):
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        """returns the list of unrelated entities, using the entity's
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        appropriate vocabulary function
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        """
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        skip = set(e.eid for e in entity.related(self.rtype, get_role(self),
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                                                 entities=True))
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        skip.add(None)
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        skip.add(INTERNAL_FIELD_VALUE)
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        filteretype = getattr(self, 'etype', None)
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        entities = []
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        form = self._cw.vreg['forms'].select('edition', self._cw,
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                                             rset=self.cw_rset,
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                                             row=self.cw_row or 0)
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        field = form.field_by_name(self.rtype, get_role(self), entity.e_schema)
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        for _, eid in field.vocabulary(form):
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            if eid not in skip:
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                entity = self._cw.entity_from_eid(eid)
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                if filteretype is None or entity.__regid__ == filteretype:
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                    entities.append(entity)
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        return entities
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