web/views/reledit.py
author Sylvain Thénault <sylvain.thenault@logilab.fr>
Fri, 22 Oct 2010 09:15:35 +0200
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child 6596 9717122d5e06
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[pylint] fix a bug of pylint detected errors and i18n pb (calling builtins._ instead of req._)
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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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"""the 'reedit' feature (eg edit attribute/relation from primary view"""
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__docformat__ = "restructuredtext en"
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_ = unicode
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import copy
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from warnings import warn
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from logilab.mtconverter import xml_escape
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from logilab.common.deprecation import deprecated
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from cubicweb import neg_role
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from cubicweb.schema import display_name
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from cubicweb.utils import json_dumps
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from cubicweb.selectors import non_final_entity, match_kwargs
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from cubicweb.view import EntityView
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from cubicweb.web import uicfg, stdmsgs
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from cubicweb.web.form import FieldNotFound
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from cubicweb.web.formwidgets import Button, SubmitButton
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class _DummyForm(object):
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    __slots__ = ('event_args',)
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    def form_render(self, **_args):
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        return u''
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    def render(self, *_args, **_kwargs):
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        return u''
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    def append_field(self, *args):
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        pass
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rctrl = uicfg.reledit_ctrl
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class ClickAndEditFormView(EntityView):
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    __regid__ = 'doreledit'
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    __select__ = non_final_entity() & match_kwargs('rtype')
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    # ui side continuations
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    _onclick = (u"cw.reledit.loadInlineEditionForm('%(formid)s', %(eid)s, '%(rtype)s', '%(role)s', "
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                "'%(divid)s', %(reload)s, '%(vid)s');")
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    _cancelclick = "cw.reledit.cleanupAfterCancel('%s')"
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    # ui side actions/buttons
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    _addzone = u'<img title="%(msg)s" src="data/plus.png" alt="%(msg)s"/>'
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    _addmsg = _('click to add a value')
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    _deletezone = u'<img title="%(msg)s" src="data/cancel.png" alt="%(msg)s"/>'
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    _deletemsg = _('click to delete this value')
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    _editzone = u'<img title="%(msg)s" src="data/pen_icon.png" alt="%(msg)s"/>'
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    _editzonemsg = _('click to edit this field')
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    # renderer
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    _form_renderer_id = 'base'
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    def cell_call(self, row, col, rtype=None, role='subject',
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                  reload=False, # controls reloading the whole page after change
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                                # boolean, eid (to redirect), or
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                                # function taking the subject entity & returning a boolean or an eid
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                  rvid=None,    # vid to be applied to other side of rtype (non final relations only)
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                  default_value=None,
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                  formid='base'
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                  ):
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        """display field to edit entity's `rtype` relation on click"""
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        assert rtype
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        assert role in ('subject', 'object'), '%s is not an acceptable role value' % role
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        self._cw.add_css('cubicweb.form.css')
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        self._cw.add_js('cubicweb.reledit.js', 'cubicweb.edition.js')
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        entity = self.cw_rset.get_entity(row, col)
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        rschema = self._cw.vreg.schema[rtype]
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        self._rules = rctrl.etype_get(entity.e_schema.type, rschema.type, role, '*')
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        if rvid is not None or default_value is not None:
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            warn('[3.9] specifying rvid/default_value on select is deprecated, '
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                 'reledit_ctrl rtag to control this' % self, DeprecationWarning)
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        reload = self._compute_reload(entity, rschema, role, reload)
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        divid = self._build_divid(rtype, role, entity.eid)
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        if rschema.final:
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            self._handle_attribute(entity, rschema, role, divid, reload)
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        else:
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            if self._is_composite():
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                self._handle_composite(entity, rschema, role, divid, reload, formid)
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            else:
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                self._handle_relation(entity, rschema, role, divid, reload, formid)
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    def _handle_attribute(self, entity, rschema, role, divid, reload):
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        rtype = rschema.type
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        value = entity.printable_value(rtype)
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        if not self._should_edit_attribute(entity, rschema):
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            self.w(value)
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            return
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        display_label, related_entity = self._prepare_form(entity, rtype, role)
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        form, renderer = self._build_form(entity, rtype, role, divid, 'base',
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                                          reload, display_label, related_entity)
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        value = value or self._compute_default_value(rschema, role)
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        self.view_form(divid, value, form, renderer)
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    def _compute_formid_value(self, entity, rschema, role, rvid, formid):
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        related_rset = entity.related(rschema.type, role)
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        if related_rset:
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            value = self._cw.view(rvid, related_rset)
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        else:
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            value = self._compute_default_value(rschema, role)
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        if not self._should_edit_relation(entity, rschema, role):
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            return None, value
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        return formid, value
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   119
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    def _handle_relation(self, entity, rschema, role, divid, reload, formid):
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        rvid = self._rules.get('rvid', 'autolimited')
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        formid, value = self._compute_formid_value(entity, rschema, role, rvid, formid)
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        if formid is None:
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            return self.w(value)
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        rtype = rschema.type
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        display_label, related_entity = self._prepare_form(entity, rtype, role)
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        form, renderer = self._build_form(entity, rtype, role, divid, formid, reload,
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                                          display_label, related_entity, dict(vid=rvid))
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        self.view_form(divid, value, form, renderer)
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   130
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    def _handle_composite(self, entity, rschema, role, divid, reload, formid):
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        # this is for attribute-like composites (1 target type, 1 related entity at most, for now)
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        ttypes = self._compute_ttypes(rschema, role)
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        related_rset = entity.related(rschema.type, role)
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        add_related = self._may_add_related(related_rset, entity, rschema, role, ttypes)
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        edit_related = self._may_edit_related_entity(related_rset, entity, rschema, role, ttypes)
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        delete_related = edit_related and self._may_delete_related(related_rset, entity, rschema, role)
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        rvid = self._rules.get('rvid', 'autolimited')
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        formid, value = self._compute_formid_value(entity, rschema, role, rvid, formid)
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        if formid is None or not (edit_related or add_related):
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            # till we learn to handle cases where not (edit_related or add_related)
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            self.w(value)
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            return
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        rtype = rschema.type
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        ttype = ttypes[0]
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        _fdata = self._prepare_composite_form(entity, rtype, role, edit_related,
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                                              add_related and ttype)
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        display_label, related_entity = _fdata
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        form, renderer = self._build_form(entity, rtype, role, divid, formid, reload,
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                                          display_label, related_entity, dict(vid=rvid))
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        self.view_form(divid, value, form, renderer,
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                       edit_related, add_related, delete_related)
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    def _compute_ttypes(self, rschema, role):
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        dual_role = neg_role(role)
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        return getattr(rschema, '%ss' % dual_role)()
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    def _compute_reload(self, entity, rschema, role, reload):
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        ctrl_reload = self._rules.get('reload', reload)
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        if callable(ctrl_reload):
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            ctrl_reload = ctrl_reload(entity)
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        if isinstance(ctrl_reload, int) and ctrl_reload > 1: # not True/False
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            ctrl_reload = self._cw.build_url(ctrl_reload)
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        return ctrl_reload
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    def _compute_default_value(self, rschema, role):
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        default = self._rules.get('novalue_label')
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        if default is None:
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            if self._rules.get('novalue_include_rtype'):
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                default = self._cw._('<%s not specified>') % display_name(
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                    self._cw, rschema.type, role)
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            else:
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                default = self._cw._('<not specified>')
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        return xml_escape(default)
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    def _is_composite(self):
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        return self._rules.get('edit_target') == 'related'
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    def _may_add_related(self, related_rset, entity, rschema, role, ttypes):
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        """ ok for attribute-like composite entities """
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        if len(ttypes) > 1: # many etypes: learn how to do it
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            return False
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        rdef = rschema.role_rdef(entity.e_schema, ttypes[0], role)
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        card = rdef.role_cardinality(role)
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        if related_rset or card not in '?1':
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            return False
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        if role == 'subject':
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            kwargs = {'fromeid': entity.eid}
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   189
        else:
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            kwargs = {'toeid': entity.eid}
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   191
        return rdef.has_perm(self._cw, 'add', **kwargs)
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    def _may_edit_related_entity(self, related_rset, entity, rschema, role, ttypes):
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        """ controls the edition of the related entity """
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        if len(ttypes) > 1 or len(related_rset.rows) != 1:
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            return False
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        if entity.e_schema.rdef(rschema, role).role_cardinality(role) not in '?1':
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            return False
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        return related_rset.get_entity(0, 0).cw_has_perm('update')
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    def _may_delete_related(self, related_rset, entity, rschema, role):
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        # we assume may_edit_related, only 1 related entity
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   203
        if not related_rset:
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            return False
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        rentity = related_rset.get_entity(0, 0)
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        if role == 'subject':
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            kwargs = {'fromeid': entity.eid, 'toeid': rentity.eid}
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        else:
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            kwargs = {'fromeid': rentity.eid, 'toeid': entity.eid}
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        # NOTE: should be sufficient given a well built schema/security
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        return rschema.has_perm(self._cw, 'delete', **kwargs)
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    def _build_edit_zone(self):
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        return self._editzone % {'msg' : xml_escape(self._cw._(self._editzonemsg))}
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    def _build_delete_zone(self):
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        return self._deletezone % {'msg': xml_escape(self._cw._(self._deletemsg))}
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    def _build_add_zone(self):
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        return self._addzone % {'msg': xml_escape(self._cw._(self._addmsg))}
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    def _build_divid(self, rtype, role, entity_eid):
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        """ builds an id for the root div of a reledit widget """
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        return '%s-%s-%s' % (rtype, role, entity_eid)
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    def _build_args(self, entity, rtype, role, formid, reload,
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                    extradata=None):
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        divid = self._build_divid(rtype, role, entity.eid)
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        event_args = {'divid' : divid, 'eid' : entity.eid, 'rtype' : rtype, 'formid': formid,
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                      'reload' : json_dumps(reload),
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                      'role' : role, 'vid' : u''}
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        if extradata:
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            event_args.update(extradata)
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        return event_args
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    def _prepare_form(self, entity, _rtype, role):
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        display_label = False
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        related_entity = entity
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        return display_label, related_entity
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    def _prepare_composite_form(self, entity, rtype, role, edit_related, add_related):
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        display_label = True
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        if edit_related and not add_related:
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            related_entity = entity.related(rtype, role).get_entity(0, 0)
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        elif add_related:
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            _new_entity = self._cw.vreg['etypes'].etype_class(add_related)(self._cw)
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            _new_entity.eid = self._cw.varmaker.next()
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            related_entity = _new_entity
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            # XXX see forms.py ~ 276 and entities.linked_to method
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            #     is there another way ?
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            self._cw.form['__linkto'] = '%s:%s:%s' % (rtype, entity.eid, neg_role(role))
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        return display_label, related_entity
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    def _build_renderer(self, related_entity, display_label):
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        return self._cw.vreg['formrenderers'].select(
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            self._form_renderer_id, self._cw, entity=related_entity,
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            display_label=display_label,
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            table_class='attributeForm' if display_label else '',
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            display_help=False, button_bar_class='buttonbar',
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            display_progress_div=False)
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    def _build_form(self, entity, rtype, role, divid, formid, reload,
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                    display_label, related_entity, extradata=None, **formargs):
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        event_args = self._build_args(entity, rtype, role, formid,
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                                      reload, extradata)
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        cancelclick = self._cancelclick % divid
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        form = self._cw.vreg['forms'].select(
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            formid, self._cw, rset=related_entity.as_rset(), entity=related_entity,
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            domid='%s-form' % divid, formtype='inlined',
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            action=self._cw.build_url('validateform', __onsuccess='window.parent.cw.reledit.onSuccess'),
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            cwtarget='eformframe', cssclass='releditForm',
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            **formargs)
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        # pass reledit arguments
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        for pname, pvalue in event_args.iteritems():
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            form.add_hidden('__reledit|' + pname, pvalue)
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        # handle buttons
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        if form.form_buttons: # edition, delete
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            form_buttons = []
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            for button in form.form_buttons:
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                if not button.label.endswith('apply'):
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                    if button.label.endswith('cancel'):
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                        button = copy.deepcopy(button)
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                        button.cwaction = None
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                        button.onclick = cancelclick
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                    form_buttons.append(button)
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            form.form_buttons = form_buttons
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        else: # base
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            form.form_buttons = [SubmitButton(),
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                                 Button(stdmsgs.BUTTON_CANCEL, onclick=cancelclick)]
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        form.event_args = event_args
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   291
        if formid == 'base':
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            field = form.field_by_name(rtype, role, entity.e_schema)
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   293
            form.append_field(field)
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   294
        return form, self._build_renderer(related_entity, display_label)
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    def _should_edit_attribute(self, entity, rschema):
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        rdef = entity.e_schema.rdef(rschema)
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        # check permissions
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        if not entity.cw_has_perm('update'):
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            return False
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        rdef = entity.e_schema.rdef(rschema)
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        return rdef.has_perm(self._cw, 'update', eid=entity.eid)
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   304
    should_edit_attributes = deprecated('[3.9] should_edit_attributes is deprecated,'
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                                        ' use _should_edit_attribute instead',
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                                        _should_edit_attribute)
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   308
    def _should_edit_relation(self, entity, rschema, role):
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   309
        eeid = entity.eid
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        perm_args = {'fromeid': eeid} if role == 'subject' else {'toeid': eeid}
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        return rschema.has_perm(self._cw, 'add', **perm_args)
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   313
    should_edit_relations = deprecated('[3.9] should_edit_relations is deprecated,'
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                                       ' use _should_edit_relation instead',
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                                       _should_edit_relation)
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   316
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    def _open_form_wrapper(self, divid, value, form, renderer,
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                           _edit_related, _add_related, _delete_related):
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        w = self.w
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        w(u'<div id="%(id)s-reledit" onmouseout="%(out)s" onmouseover="%(over)s" class="%(css)s">' %
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          {'id': divid, 'css': 'releditField',
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           'out': "jQuery('#%s').addClass('hidden')" % divid,
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           'over': "jQuery('#%s').removeClass('hidden')" % divid})
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        w(u'<div id="%s-value" class="editableFieldValue">' % divid)
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        w(value)
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        w(u'</div>')
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        w(form.render(renderer=renderer))
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        w(u'<div id="%s" class="editableField hidden">' % divid)
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   329
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   330
    def _edit_action(self, divid, args, edit_related, add_related, _delete_related):
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        if not add_related: # currently, excludes edition
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   332
            w = self.w
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   333
            args['formid'] = 'edition' if edit_related else 'base'
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   334
            w(u'<div id="%s-update" class="editableField" onclick="%s" title="%s">' %
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   335
              (divid, xml_escape(self._onclick % args), self._cw._(self._editzonemsg)))
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   336
            w(self._build_edit_zone())
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   337
            w(u'</div>')
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   338
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   339
    def _add_action(self, divid, args, _edit_related, add_related, _delete_related):
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   340
        if add_related:
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   341
            w = self.w
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   342
            args['formid'] = 'edition' if add_related else 'base'
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   343
            w(u'<div id="%s-add" class="editableField" onclick="%s" title="%s">' %
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   344
              (divid, xml_escape(self._onclick % args), self._cw._(self._addmsg)))
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   345
            w(self._build_add_zone())
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   346
            w(u'</div>')
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   347
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   348
    def _del_action(self, divid, args, _edit_related, _add_related, delete_related):
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   349
        if delete_related:
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   350
            w = self.w
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   351
            args['formid'] = 'deleteconf'
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   352
            w(u'<div id="%s-delete" class="editableField" onclick="%s" title="%s">' %
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   353
              (divid, xml_escape(self._onclick % args), self._cw._(self._deletemsg)))
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   354
            w(self._build_delete_zone())
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   355
            w(u'</div>')
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   356
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   357
    def _close_form_wrapper(self):
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   358
        self.w(u'</div>')
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   359
        self.w(u'</div>')
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   360
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   361
    def view_form(self, divid, value, form=None, renderer=None,
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   362
                  edit_related=False, add_related=False, delete_related=False):
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   363
        self._open_form_wrapper(divid, value, form, renderer,
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   364
                                edit_related, add_related, delete_related)
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   365
        args = form.event_args.copy()
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   366
        self._edit_action(divid, args, edit_related, add_related, delete_related)
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   367
        self._add_action(divid, args, edit_related, add_related, delete_related)
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   368
        self._del_action(divid, args, edit_related, add_related, delete_related)
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   369
        self._close_form_wrapper()
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   370
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   371
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   372
class AutoClickAndEditFormView(ClickAndEditFormView):
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    __regid__ = 'reledit'
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   374
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    def _build_form(self, entity, rtype, role, divid, formid, reload,
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                    display_label, related_entity, extradata=None, **formargs):
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   377
        event_args = self._build_args(entity, rtype, role, 'base',
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   378
                                      reload, extradata)
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   379
        form = _DummyForm()
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   380
        form.event_args = event_args
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   381
        return form, None