web/views/editcontroller.py
author Pierre-Yves David <pierre-yves.david@logilab.fr>
Tue, 02 Apr 2013 18:15:24 +0200
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parent 8748 f5027f8d2478
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child 9177 5236d0e4c598
permissions -rw-r--r--
merge with stable fix
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# copyright 2003-2012 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 edit controller, automatically handling entity form submitting"""
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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 rql.utils import rqlvar_maker
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from cubicweb import Binary, ValidationError
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from cubicweb.view import EntityAdapter, implements_adapter_compat
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from cubicweb.predicates import is_instance
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from cubicweb.web import (INTERNAL_FIELD_VALUE, RequestError, NothingToEdit,
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                          ProcessFormError)
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from cubicweb.web.views import basecontrollers, autoform
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class IEditControlAdapter(EntityAdapter):
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    __needs_bw_compat__ = True
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    __regid__ = 'IEditControl'
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    __select__ = is_instance('Any')
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    def __init__(self, _cw, **kwargs):
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        if self.__class__ is not IEditControlAdapter:
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            warn('[3.14] IEditControlAdapter is deprecated, override EditController'
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                 ' using match_edited_type or match_form_id selectors for example.',
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                 DeprecationWarning)
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        super(IEditControlAdapter, self).__init__(_cw, **kwargs)
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    @implements_adapter_compat('IEditControl')
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    def after_deletion_path(self):
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        """return (path, parameters) which should be used as redirect
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        information when this entity is being deleted
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        """
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        parent = self.entity.cw_adapt_to('IBreadCrumbs').parent_entity()
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        if parent is not None:
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            return parent.rest_path(), {}
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        return str(self.entity.e_schema).lower(), {}
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    @implements_adapter_compat('IEditControl')
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    def pre_web_edit(self):
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        """callback called by the web editcontroller when an entity will be
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        created/modified, to let a chance to do some entity specific stuff.
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        Do nothing by default.
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        """
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        pass
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def valerror_eid(eid):
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    try:
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        return int(eid)
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    except (ValueError, TypeError):
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        return eid
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class RqlQuery(object):
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    def __init__(self):
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        self.edited = []
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        self.restrictions = []
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        self.kwargs = {}
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    def __repr__(self):
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        return ('Query <edited=%r restrictions=%r kwargs=%r>' % (
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            self.edited, self.restrictions, self.kwargs))
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    def insert_query(self, etype):
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        if self.edited:
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            rql = 'INSERT %s X: %s' % (etype, ','.join(self.edited))
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        else:
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            rql = 'INSERT %s X' % etype
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        if self.restrictions:
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            rql += ' WHERE %s' % ','.join(self.restrictions)
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        return rql
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    def update_query(self, eid):
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        varmaker = rqlvar_maker()
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        var = varmaker.next()
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        while var in self.kwargs:
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            var = varmaker.next()
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        rql = 'SET %s WHERE X eid %%(%s)s' % (','.join(self.edited), var)
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        if self.restrictions:
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            rql += ', %s' % ','.join(self.restrictions)
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        self.kwargs[var] = eid
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        return rql
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class EditController(basecontrollers.ViewController):
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    __regid__ = 'edit'
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parents: 1977
diff changeset
   108
    def publish(self, rset=None):
0
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diff changeset
   109
        """edit / create / copy / delete entity / relations"""
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parents: 3396
diff changeset
   110
        for key in self._cw.form:
0
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diff changeset
   111
            # There should be 0 or 1 action
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parents:
diff changeset
   112
            if key.startswith('__action_'):
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   113
                cbname = key[1:]
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parents:
diff changeset
   114
                try:
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parents:
diff changeset
   115
                    callback = getattr(self, cbname)
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diff changeset
   116
                except AttributeError:
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   117
                    raise RequestError(self._cw._('invalid action %r' % key))
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   118
                else:
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   119
                    return callback()
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   120
        self._default_publish()
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   121
        self.reset()
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   122
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   123
    def _default_publish(self):
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diff changeset
   124
        req = self._cw
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   125
        self.errors = []
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   126
        self.relations_rql = []
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   127
        form = req.form
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parents: 3689
diff changeset
   128
        # so we're able to know the main entity from the repository side
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Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3689
diff changeset
   129
        if '__maineid' in form:
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ee76e8e72776 [dbapi] update renamed argument
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parents: 5877
diff changeset
   130
            req.set_shared_data('__maineid', form['__maineid'], txdata=True)
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   131
        # no specific action, generic edition
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   132
        self._to_create = req.data['eidmap'] = {}
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67dd296f864d should use a set for pending fields
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parents: 4224
diff changeset
   133
        self._pending_fields = req.data['pendingfields'] = set()
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parents: 6384
diff changeset
   134
        try:
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parents: 6384
diff changeset
   135
            for eid in req.edited_eids():
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parents: 6384
diff changeset
   136
                # __type and eid
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diff changeset
   137
                formparams = req.extract_entity_params(eid, minparams=2)
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diff changeset
   138
                eid = self.edit_entity(formparams)
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358d8bed9626 [toward-py3k] rewrite to "except AnException as exc:" (part of #2711624)
Nicolas Chauvat <nicolas.chauvat@logilab.fr>
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diff changeset
   139
        except (RequestError, NothingToEdit) as ex:
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diff changeset
   140
            if '__linkto' in req.form and 'eid' in req.form:
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parents: 6384
diff changeset
   141
                self.execute_linkto()
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diff changeset
   142
            elif not ('__delete' in req.form or '__insert' in req.form):
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parents: 6384
diff changeset
   143
                raise ValidationError(None, {None: unicode(ex)})
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diff changeset
   144
        # handle relations in newly created entities
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parents: 4160
diff changeset
   145
        if self._pending_fields:
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parents: 4160
diff changeset
   146
            for form, field in self._pending_fields:
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parents: 4160
diff changeset
   147
                self.handle_formfield(form, field)
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parents: 4160
diff changeset
   148
        # execute rql to set all relations
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diff changeset
   149
        for querydef in self.relations_rql:
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diff changeset
   150
            self._cw.execute(*querydef)
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diff changeset
   151
        # XXX this processes *all* pending operations of *all* entities
8697
574bb05e40a4 [toward py3k] rewrite has_key() (part of #2711624)
Nicolas Chauvat <nicolas.chauvat@logilab.fr>
parents: 8695
diff changeset
   152
        if '__delete' in req.form:
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35cd057339b2 turn all the stuff used to handle 'generic relations' in forms into proper
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 4252
diff changeset
   153
            todelete = req.list_form_param('__delete', req.form, pop=True)
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parents: 4252
diff changeset
   154
            if todelete:
4387
4aacd6492ef4 reorganize code:
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 4359
diff changeset
   155
                autoform.delete_relations(self._cw, todelete)
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parents: 3396
diff changeset
   156
        self._cw.remove_pending_operations()
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diff changeset
   157
        if self.errors:
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parents: 4160
diff changeset
   158
            errors = dict((f.name, unicode(ex)) for f, ex in self.errors)
5038
90493551b1eb [form] fix validation error handling
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parents: 4940
diff changeset
   159
            raise ValidationError(valerror_eid(form.get('__maineid')), errors)
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parents: 1361
diff changeset
   160
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diff changeset
   161
    def _insert_entity(self, etype, eid, rqlquery):
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diff changeset
   162
        rql = rqlquery.insert_query(etype)
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parents: 3386
diff changeset
   163
        try:
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parents: 3396
diff changeset
   164
            entity = self._cw.execute(rql, rqlquery.kwargs).get_entity(0, 0)
3387
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diff changeset
   165
            neweid = entity.eid
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358d8bed9626 [toward-py3k] rewrite to "except AnException as exc:" (part of #2711624)
Nicolas Chauvat <nicolas.chauvat@logilab.fr>
parents: 8556
diff changeset
   166
        except ValidationError as ex:
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diff changeset
   167
            self._to_create[eid] = ex.entity
8128
0a927fe4541b [controllers] deprecate JSonController and implement AjaxController / ajax-func registry (closes #2110265)
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 8041
diff changeset
   168
            if self._cw.ajax_request: # XXX (syt) why?
3387
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diff changeset
   169
                ex.entity = eid
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diff changeset
   170
            raise
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diff changeset
   171
        self._to_create[eid] = neweid
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diff changeset
   172
        return neweid
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diff changeset
   173
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diff changeset
   174
    def _update_entity(self, eid, rqlquery):
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parents: 4160
diff changeset
   175
        self._cw.execute(rqlquery.update_query(eid), rqlquery.kwargs)
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parents: 1361
diff changeset
   176
0
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diff changeset
   177
    def edit_entity(self, formparams, multiple=False):
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   178
        """edit / create / copy an entity and return its eid"""
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diff changeset
   179
        etype = formparams['__type']
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diff changeset
   180
        entity = self._cw.vreg['etypes'].etype_class(etype)(self._cw)
6029
aac5dba278c7 [editcontroller] turn eid into an int if possible, avoiding pbs. further down (case: preview cube)
Aurelien Campeas <aurelien.campeas@logilab.fr>
parents: 5877
diff changeset
   181
        entity.eid = valerror_eid(formparams['eid'])
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diff changeset
   182
        is_main_entity = self._cw.form.get('__maineid') == formparams['eid']
8034
b07d61090706 replace adapter by simple selector to ease edit controller overloading; fixes #2042349
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parents: 7990
diff changeset
   183
        # let a chance to do some entity specific stuff
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parents: 7990
diff changeset
   184
        entity.cw_adapt_to('IEditControl').pre_web_edit()
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parents: 7990
diff changeset
   185
        # create a rql query from parameters
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parents: 7990
diff changeset
   186
        rqlquery = RqlQuery()
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parents: 7990
diff changeset
   187
        # process inlined relations at the same time as attributes
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parents: 7990
diff changeset
   188
        # this will generate less rql queries and might be useful in
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parents: 7990
diff changeset
   189
        # a few dark corners
7182
09454384fff8 [edit controller] fix subform formid in EditController (would need further improvement)
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parents: 6864
diff changeset
   190
        if is_main_entity:
09454384fff8 [edit controller] fix subform formid in EditController (would need further improvement)
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parents: 6864
diff changeset
   191
            formid = self._cw.form.get('__form_id', 'edition')
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diff changeset
   192
        else:
09454384fff8 [edit controller] fix subform formid in EditController (would need further improvement)
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parents: 6864
diff changeset
   193
            # XXX inlined forms formid should be saved in a different formparams entry
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parents: 6864
diff changeset
   194
            # inbetween, use cubicweb standard formid for inlined forms
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diff changeset
   195
            formid = 'edition'
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diff changeset
   196
        form = self._cw.vreg['forms'].select(formid, self._cw, entity=entity)
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diff changeset
   197
        eid = form.actual_eid(entity.eid)
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diff changeset
   198
        try:
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e1881933f366 [form, controller] closes #1787233: form should provide a method to process posted content
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diff changeset
   199
            editedfields = formparams['_cw_entity_fields']
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diff changeset
   200
        except KeyError:
0
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diff changeset
   201
            try:
7584
e1881933f366 [form, controller] closes #1787233: form should provide a method to process posted content
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diff changeset
   202
                editedfields = formparams['_cw_edited_fields']
e1881933f366 [form, controller] closes #1787233: form should provide a method to process posted content
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parents: 7182
diff changeset
   203
                warn('[3.13] _cw_edited_fields has been renamed _cw_entity_fields',
e1881933f366 [form, controller] closes #1787233: form should provide a method to process posted content
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parents: 7182
diff changeset
   204
                     DeprecationWarning)
e1881933f366 [form, controller] closes #1787233: form should provide a method to process posted content
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parents: 7182
diff changeset
   205
            except KeyError:
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parents: 7182
diff changeset
   206
                raise RequestError(self._cw._('no edited fields specified for entity %s' % entity.eid))
e1881933f366 [form, controller] closes #1787233: form should provide a method to process posted content
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7182
diff changeset
   207
        form.formvalues = {} # init fields value cache
e1881933f366 [form, controller] closes #1787233: form should provide a method to process posted content
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7182
diff changeset
   208
        for field in form.iter_modified_fields(editedfields, entity):
e1881933f366 [form, controller] closes #1787233: form should provide a method to process posted content
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parents: 7182
diff changeset
   209
            self.handle_formfield(form, field, rqlquery)
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diff changeset
   210
        if self.errors:
4224
5998df006968 refactor form error handling:
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 4171
diff changeset
   211
            errors = dict((f.role_name(), unicode(ex)) for f, ex in self.errors)
5038
90493551b1eb [form] fix validation error handling
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 4940
diff changeset
   212
            raise ValidationError(valerror_eid(entity.eid), errors)
0
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parents:
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        if eid is None: # creation or copy
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            entity.eid = self._insert_entity(etype, formparams['eid'], rqlquery)
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        elif rqlquery.edited: # edition of an existant entity
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            self._update_entity(eid, rqlquery)
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        if is_main_entity:
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            self.notify_edited(entity)
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        if '__delete' in formparams:
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            # XXX deprecate?
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            todelete = self._cw.list_form_param('__delete', formparams, pop=True)
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            autoform.delete_relations(self._cw, todelete)
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        if '__cloned_eid' in formparams:
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            entity.copy_relations(int(formparams['__cloned_eid']))
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        if is_main_entity: # only execute linkto for the main entity
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            self.execute_linkto(entity.eid)
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        return eid
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    def handle_formfield(self, form, field, rqlquery=None):
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        eschema = form.edited_entity.e_schema
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        try:
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            for field, value in field.process_posted(form):
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                if not (
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                    (field.role == 'subject' and field.name in eschema.subjrels)
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                    or
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                    (field.role == 'object' and field.name in eschema.objrels)):
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                    continue
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                rschema = self._cw.vreg.schema.rschema(field.name)
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                if rschema.final:
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                    rqlquery.kwargs[field.name] = value
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                    rqlquery.edited.append('X %s %%(%s)s' % (rschema, rschema))
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                else:
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                    if form.edited_entity.has_eid():
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                        origvalues = set(entity.eid for entity in form.edited_entity.related(field.name, field.role, entities=True))
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                    else:
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                        origvalues = set()
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                    if value is None or value == origvalues:
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                        continue # not edited / not modified / to do later
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                    if rschema.inlined and rqlquery is not None and field.role == 'subject':
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                        self.handle_inlined_relation(form, field, value, origvalues, rqlquery)
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                    elif form.edited_entity.has_eid():
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                        self.handle_relation(form, field, value, origvalues)
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                    else:
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                        self._pending_fields.add( (form, field) )
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        except ProcessFormError as exc:
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            self.errors.append((field, exc))
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    def handle_inlined_relation(self, form, field, values, origvalues, rqlquery):
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        """handle edition for the (rschema, x) relation of the given entity
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        """
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        attr = field.name
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        if values:
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            rqlquery.kwargs[attr] = iter(values).next()
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            rqlquery.edited.append('X %s %s' % (attr, attr.upper()))
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            rqlquery.restrictions.append('%s eid %%(%s)s' % (attr.upper(), attr))
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        elif form.edited_entity.has_eid():
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            self.handle_relation(form, field, values, origvalues)
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    def handle_relation(self, form, field, values, origvalues):
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        """handle edition for the (rschema, x) relation of the given entity
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        """
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        etype = form.edited_entity.e_schema
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        rschema = self._cw.vreg.schema.rschema(field.name)
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        if field.role == 'subject':
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            desttype = rschema.objects(etype)[0]
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            card = rschema.rdef(etype, desttype).cardinality[0]
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            subjvar, objvar = 'X', 'Y'
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        else:
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            desttype = rschema.subjects(etype)[0]
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            card = rschema.rdef(desttype, etype).cardinality[1]
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            subjvar, objvar = 'Y', 'X'
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        eid = form.edited_entity.eid
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        if field.role == 'object' or not rschema.inlined or not values:
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            # this is not an inlined relation or no values specified,
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            # explicty remove relations
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            rql = 'DELETE %s %s %s WHERE X eid %%(x)s, Y eid %%(y)s' % (
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                subjvar, rschema, objvar)
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            for reid in origvalues.difference(values):
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                self.relations_rql.append((rql, {'x': eid, 'y': reid}))
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        seteids = values.difference(origvalues)
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        if seteids:
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            rql = 'SET %s %s %s WHERE X eid %%(x)s, Y eid %%(y)s' % (
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                subjvar, rschema, objvar)
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            for reid in seteids:
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                self.relations_rql.append((rql, {'x': eid, 'y': reid}))
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    def delete_entities(self, eidtypes):
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        """delete entities from the repository"""
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        redirect_info = set()
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        eidtypes = tuple(eidtypes)
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        for eid, etype in eidtypes:
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            entity = self._cw.entity_from_eid(eid, etype)
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            path, params = entity.cw_adapt_to('IEditControl').after_deletion_path()
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            redirect_info.add( (path, tuple(params.iteritems())) )
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            entity.cw_delete()
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        if len(redirect_info) > 1:
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            # In the face of ambiguity, refuse the temptation to guess.
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            self._after_deletion_path = 'view', ()
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        else:
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            self._after_deletion_path = iter(redirect_info).next()
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        if len(eidtypes) > 1:
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            self._cw.set_message(self._cw._('entities deleted'))
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        else:
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            self._cw.set_message(self._cw._('entity deleted'))
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0
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    def _action_apply(self):
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        self._default_publish()
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        self.reset()
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    def _action_cancel(self):
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        errorurl = self._cw.form.get('__errorurl')
0
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        if errorurl:
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            self._cw.cancel_edition(errorurl)
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        self._cw.set_message(self._cw._('edit canceled'))
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        return self.reset()
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    def _action_delete(self):
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        self.delete_entities(self._cw.edited_eids(withtype=True))
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        return self.reset()