web/views/editforms.py
author Nicolas Chauvat <nicolas.chauvat@logilab.fr>
Fri, 22 May 2009 01:31:21 +0200
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child 1965 34f57246330d
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"""Set of HTML automatic forms to create, delete, copy or edit a single entity
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or a list of entities of the same type
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:organization: Logilab
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:copyright: 2001-2009 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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__docformat__ = "restructuredtext en"
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from copy import copy
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from simplejson import dumps
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from logilab.mtconverter import html_escape
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from cubicweb.selectors import (match_kwargs, one_line_rset, non_final_entity,
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                                specified_etype_implements, yes)
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from cubicweb.utils import make_uid
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from cubicweb.view import EntityView
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from cubicweb.common import tags
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from cubicweb.web import INTERNAL_FIELD_VALUE, stdmsgs, eid_param
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from cubicweb.web.form import CompositeForm, EntityFieldsForm, FormViewMixIn
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from cubicweb.web.formfields import RelationField
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from cubicweb.web.formwidgets import Button, SubmitButton, ResetButton, Select
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from cubicweb.web.formrenderers import (FormRenderer, EntityFormRenderer,
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                                        EntityCompositeFormRenderer,
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                                        EntityInlinedFormRenderer)
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_ = unicode
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def relation_id(eid, rtype, role, reid):
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    """return an identifier for a relation between two entities"""
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    if role == 'subject':
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        return u'%s:%s:%s' % (eid, rtype, reid)
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    return u'%s:%s:%s' % (reid, rtype, eid)
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def toggleable_relation_link(eid, nodeid, label='x'):
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    """return javascript snippet to delete/undelete a relation between two
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    entities
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    """
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    js = u"javascript: togglePendingDelete('%s', %s);" % (
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        nodeid, html_escape(dumps(eid)))
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    return u'[<a class="handle" href="%s" id="handle%s">%s</a>]' % (
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        js, nodeid, label)
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class DeleteConfForm(FormViewMixIn, EntityView):
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    """form used to confirm deletion of some entities"""
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    id = 'deleteconf'
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    title = _('delete')
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    # don't use navigation, all entities asked to be deleted should be displayed
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    # else we will only delete the displayed page
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    need_navigation = False
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    def call(self, onsubmit=None):
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        """ask for confirmation before real deletion"""
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        req, w = self.req, self.w
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        _ = req._
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        w(u'<script type="text/javascript">updateMessage(\'%s\');</script>\n'
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          % _('this action is not reversible!'))
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        # XXX above message should have style of a warning
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        w(u'<h4>%s</h4>\n' % _('Do you want to delete the following element(s) ?'))
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        form = CompositeForm(req, domid='deleteconf', copy_nav_params=True,
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                             action=self.build_url('edit'), onsubmit=onsubmit,
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                             form_buttons=[Button(stdmsgs.YES, cwaction='delete'),
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                                           Button(stdmsgs.NO, cwaction='cancel')])
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        done = set()
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        w(u'<ul>\n')
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        for entity in self.rset.entities():
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            if entity.eid in done:
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                continue
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            done.add(entity.eid)
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            subform = EntityFieldsForm(req, entity=entity, set_error_url=False)
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            form.form_add_subform(subform)
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            # don't use outofcontext view or any other that may contain inline edition form
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            w(u'<li>%s</li>' % tags.a(entity.view('textoutofcontext'),
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                                      href=entity.absolute_url()))
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        w(u'</ul>\n')
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        w(form.form_render())
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class ClickAndEditFormView(FormViewMixIn, EntityView):
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    """form used to permit ajax edition of an attribute of an entity in a view
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    (double-click on the field to see an appropriate edition widget)
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    """
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    id = 'reledit'
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    __select__ = non_final_entity() & match_kwargs('rtype')
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    # FIXME editableField class could be toggleable from userprefs
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    onsubmit = ("return inlineValidateAttributeForm('%(divid)s-form', '%(rtype)s', "
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                "'%(eid)s', '%(divid)s', %(reload)s, '%(default)s');")
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    ondblclick = "showInlineEditionForm(%(eid)s, '%(rtype)s', '%(divid)s')"
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    def cell_call(self, row, col, rtype=None, role='subject', reload=False,
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                  vid='textoutofcontext', default=None):
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        """display field to edit entity's `rtype` relation on double-click"""
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        rschema = self.schema.rschema(rtype)
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        entity = self.entity(row, col)
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        if not default:
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            default = self.req._('not specified')
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        if rschema.is_final():
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            if getattr(entity, rtype) is None:
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                value = default
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            else:
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                value = entity.printable_value(rtype)
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        else:
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            rset = entity.related(rtype, role)
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            # XXX html_escape but that depends of the actual vid
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            value = html_escape(self.view(vid, rset, 'null') or default)
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        if not entity.has_perm('update'):
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            self.w(value)
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            return
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        if rschema.is_final():
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            form = self._build_attribute_form(entity, value, rtype, role, reload, row, col, default)
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        else:
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            form = self._build_relation_form(entity, value, rtype, role, row, col, vid, default)
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        form.form_add_hidden(u'__maineid', entity.eid)
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        renderer = FormRenderer(display_label=False, display_help=False,
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                                display_fields=[(rtype, role)],
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                                table_class='', button_bar_class='buttonbar',
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                                display_progress_div=False)
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        self.w(form.form_render(renderer=renderer))
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    def _build_relation_form(self, entity, value, rtype, role, row, col, vid, default):
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        entity = self.entity(row, col)
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        divid = 'd%s' % make_uid('%s-%s' % (rtype, entity.eid))
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        event_data = {'divid' : divid, 'eid' : entity.eid, 'rtype' : rtype, 'vid' : vid,
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                      'default' : default, 'role' : role}
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        form = EntityFieldsForm(self.req, None, entity=entity, action='#',
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                                domid='%s-form' % divid,
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                                cssstyle='display: none',
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                                onsubmit=("return inlineValidateRelationForm('%(divid)s-form', '%(rtype)s', "
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                                          "'%(role)s', '%(eid)s', '%(divid)s', '%(vid)s', '%(default)s');" %
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                                          event_data),
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                                form_buttons=[SubmitButton(),
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                                              Button(stdmsgs.BUTTON_CANCEL,
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                                                     onclick="cancelInlineEdit(%s,\'%s\',\'%s\')" %\
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                                                         (entity.eid, rtype, divid))])
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        form.append_field(RelationField(name=rtype, role=role, sort=True,
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                                        widget=Select(),
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                                        label=u' '))
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        self.w(tags.div(value, klass='editableField', id=divid,
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                        ondblclick=self.ondblclick % event_data))
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        return form
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    def _build_attribute_form(self, entity, value, rtype, role, reload, row, col, default):
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        eid = entity.eid
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        divid = 'd%s' % make_uid('%s-%s' % (rtype, eid))
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        event_data = {'divid' : divid, 'eid' : eid, 'rtype' : rtype,
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                      'reload' : dumps(reload), 'default' : default}
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        buttons = [SubmitButton(stdmsgs.BUTTON_OK),
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                   Button(stdmsgs.BUTTON_CANCEL,
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                          onclick="cancelInlineEdit(%s,\'%s\',\'%s\')" % (
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                              eid, rtype, divid))]
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        form = self.vreg.select_object('forms', 'edition', self.req, self.rset,
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                                       row=row, col=col, form_buttons=buttons,
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                                       domid='%s-form' % divid, action='#',
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                                       cssstyle='display: none',
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                                       onsubmit=self.onsubmit % event_data)
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        self.w(tags.div(value, klass='editableField', id=divid,
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                        ondblclick=self.ondblclick % event_data))
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        return form
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class EditionFormView(FormViewMixIn, EntityView):
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    """display primary entity edition form"""
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    id = 'edition'
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    # add yes() so it takes precedence over deprecated views in baseforms,
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    # though not baseforms based customized view
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    __select__ = one_line_rset() & non_final_entity() & yes()
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    title = _('edition')
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    renderer = EntityFormRenderer()
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    def cell_call(self, row, col, **kwargs):
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        entity = self.complete_entity(row, col)
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        self.render_form(entity)
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    def render_form(self, entity):
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        """fetch and render the form"""
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        self.form_title(entity)
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        form = self.vreg.select_object('forms', 'edition', self.req, entity.rset,
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                                       row=entity.row, col=entity.col, entity=entity,
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                                       submitmsg=self.submited_message())
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        self.init_form(form, entity)
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        self.w(form.form_render(renderer=self.renderer, formvid=u'edition'))
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    def init_form(self, form, entity):
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        """customize your form before rendering here"""
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        form.form_add_hidden(u'__maineid', entity.eid)
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    def form_title(self, entity):
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        """the form view title"""
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        ptitle = self.req._(self.title)
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        self.w(u'<div class="formTitle"><span>%s %s</span></div>' % (
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            entity.dc_type(), ptitle and '(%s)' % ptitle))
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    def submited_message(self):
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        """return the message that will be displayed on successful edition"""
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        return self.req._('entity edited')
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class CreationFormView(EditionFormView):
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    """display primary entity creation form"""
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    id = 'creation'
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    __select__ = specified_etype_implements('Any') & yes()
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    title = _('creation')
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    def call(self, **kwargs):
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        """creation view for an entity"""
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        etype = kwargs.pop('etype', self.req.form.get('etype'))
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        try:
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            entity = self.vreg.etype_class(etype)(self.req)
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        except:
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            self.w(self.req._('no such entity type %s') % etype)
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        else:
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            self.initialize_varmaker()
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            entity.eid = self.varmaker.next()
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            self.render_form(entity)
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    def form_title(self, entity):
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        """the form view title"""
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        if '__linkto' in self.req.form:
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            if isinstance(self.req.form['__linkto'], list):
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                # XXX which one should be considered (case: add a ticket to a
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                # version in jpl)
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                rtype, linkto_eid, role = self.req.form['__linkto'][0].split(':')
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            else:
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                rtype, linkto_eid, role = self.req.form['__linkto'].split(':')
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            linkto_rset = self.req.eid_rset(linkto_eid)
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            linkto_type = linkto_rset.description[0][0]
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            if role == 'subject':
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                title = self.req.__('creating %s (%s %s %s %%(linkto)s)' % (
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                    entity.e_schema, entity.e_schema, rtype, linkto_type))
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            else:
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                title = self.req.__('creating %s (%s %%(linkto)s %s %s)' % (
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                    entity.e_schema, linkto_type, rtype, entity.e_schema))
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            msg = title % {'linkto' : self.view('incontext', linkto_rset)}
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            self.w(u'<div class="formTitle notransform"><span>%s</span></div>' % msg)
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        else:
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            super(CreationFormView, self).form_title(entity)
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    def url(self):
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        """return the url associated with this view"""
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        return self.create_url(self.req.form.get('etype'))
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    def submited_message(self):
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        """return the message that will be displayed on successful edition"""
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        return self.req._('entity created')
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class CopyFormView(EditionFormView):
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    """display primary entity creation form initialized with values from another
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    entity
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    """
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    id = 'copy'
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    def render_form(self, entity):
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        """fetch and render the form"""
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        # make a copy of entity to avoid altering the entity in the
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        # request's cache.
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        entity.complete()
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        self.newentity = copy(entity)
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        self.copying = entity
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        self.initialize_varmaker()
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        self.newentity.eid = self.varmaker.next()
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        self.w(u'<script type="text/javascript">updateMessage("%s");</script>\n'
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               % self.req._('Please note that this is only a shallow copy'))
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        super(CopyFormView, self).render_form(self.newentity)
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        del self.newentity
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    def init_form(self, form, entity):
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        """customize your form before rendering here"""
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        super(CopyFormView, self).init_form(form, entity)
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        if entity.eid == self.newentity.eid:
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            form.form_add_hidden(eid_param('__cloned_eid', entity.eid),
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                                 self.copying.eid)
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        for rschema, _, role in form.relations_by_category(form.attrcategories,
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                                                           'add'):
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            if not rschema.is_final():
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                # ensure relation cache is filed
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                rset = self.copying.related(rschema, role)
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                self.newentity.set_related_cache(rschema, role, rset)
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    def submited_message(self):
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        """return the message that will be displayed on successful edition"""
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        return self.req._('entity copied')
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class TableEditForm(CompositeForm):
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    id = 'muledit'
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    domid = 'entityForm'
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    onsubmit = "return validateForm('%s', null);" % domid
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    form_buttons = [SubmitButton(_('validate modifications on selected items')),
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                    ResetButton(_('revert changes'))]
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    def __init__(self, req, rset, **kwargs):
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        kwargs.setdefault('__redirectrql', rset.printable_rql())
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        super(TableEditForm, self).__init__(req, rset, **kwargs)
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        for row in xrange(len(self.rset)):
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            form = self.vreg.select_object('forms', 'edition', self.req, self.rset,
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                                           row=row, attrcategories=('primary',),
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                                           set_error_url=False)
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            # XXX rely on the EntityCompositeFormRenderer to put the eid input
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            form.remove_field(form.field_by_name('eid'))
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            self.form_add_subform(form)
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class TableEditFormView(FormViewMixIn, EntityView):
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    id = 'muledit'
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    __select__ = EntityView.__select__ & yes()
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    title = _('multiple edit')
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    def call(self, **kwargs):
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        """a view to edit multiple entities of the same type the first column
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        should be the eid
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        """
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        #self.form_title(entity)
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        form = self.vreg.select_object('forms', self.id, self.req, self.rset)
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        self.w(form.form_render(renderer=EntityCompositeFormRenderer()))
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class InlineEntityEditionFormView(FormViewMixIn, EntityView):
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    id = 'inline-edition'
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    __select__ = non_final_entity() & match_kwargs('peid', 'rtype')
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    removejs = "removeInlinedEntity('%s', '%s', '%s')"
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    def call(self, **kwargs):
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        """redefine default call() method to avoid automatic
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        insertions of <div class="section"> between each row of
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        the resultset
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        """
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        rset = self.rset
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        for i in xrange(len(rset)):
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            self.wview(self.id, rset, row=i, **kwargs)
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    def cell_call(self, row, col, peid, rtype, role='subject', **kwargs):
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        """
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        :param peid: the parent entity's eid hosting the inline form
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        :param rtype: the relation bridging `etype` and `peid`
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        :param role: the role played by the `peid` in the relation
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        """
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        entity = self.entity(row, col)
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        divonclick = "restoreInlinedEntity('%s', '%s', '%s')" % (peid, rtype,
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                                                                 entity.eid)
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        self.render_form(entity, peid, rtype, role, divonclick=divonclick)
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    def render_form(self, entity, peid, rtype, role, **kwargs):
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        """fetch and render the form"""
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        form = self.vreg.select_object('forms', 'edition', self.req, None,
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                                       entity=entity, set_error_url=False,
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                                       copy_nav_params=False)
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        self.add_hiddens(form, entity, peid, rtype, role)
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        divid = '%s-%s-%s' % (peid, rtype, entity.eid)
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        title = self.schema.rschema(rtype).display_name(self.req, role)
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        removejs = self.removejs % (peid, rtype,entity.eid)
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        self.w(form.form_render(renderer=EntityInlinedFormRenderer(), divid=divid,
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                                title=title, removejs=removejs,**kwargs))
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    def add_hiddens(self, form, entity, peid, rtype, role):
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        # to ease overriding (see cubes.vcsfile.views.forms for instance)
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        if self.keep_entity(form, entity, peid, rtype):
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            if entity.has_eid():
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                rval = entity.eid
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            else:
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                rval = INTERNAL_FIELD_VALUE
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            form.form_add_hidden('edit%s-%s:%s' % (role[0], rtype, peid), rval)
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        form.form_add_hidden(name='%s:%s' % (rtype, peid), value=entity.eid,
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                             id='rel-%s-%s-%s'  % (peid, rtype, entity.eid))
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    def keep_entity(self, form, entity, peid, rtype):
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        if not entity.has_eid():
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            return True
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        # are we regenerating form because of a validation error ?
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        if form.form_previous_values:
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            cdvalues = self.req.list_form_param(eid_param(rtype, peid),
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                                                form.form_previous_values)
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            if unicode(entity.eid) not in cdvalues:
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                return False
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        return True
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   383
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   384
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   385
class InlineEntityCreationFormView(InlineEntityEditionFormView):
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    id = 'inline-creation'
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    __select__ = (match_kwargs('peid', 'rtype')
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                  & specified_etype_implements('Any'))
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    removejs = "removeInlineForm('%s', '%s', '%s')"
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   390
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   391
    def call(self, etype, peid, rtype, role='subject', **kwargs):
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        """
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        :param etype: the entity type being created in the inline form
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        :param peid: the parent entity's eid hosting the inline form
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        :param rtype: the relation bridging `etype` and `peid`
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   396
        :param role: the role played by the `peid` in the relation
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   397
        """
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   398
        try:
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   399
            entity = self.vreg.etype_class(etype)(self.req, None, None)
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   400
        except:
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   401
            self.w(self.req._('no such entity type %s') % etype)
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   402
            return
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   403
        self.initialize_varmaker()
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   404
        entity.eid = self.varmaker.next()
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   405
        self.render_form(entity, peid, rtype, role)