web/box.py
author Alexandre Fayolle <alexandre.fayolle@logilab.fr>
Wed, 07 Apr 2010 11:56:30 +0200
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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 (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__ = 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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0
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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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0
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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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