web/views/basecontrollers.py
author Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
Fri, 16 Dec 2011 12:30:12 +0100
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[controllers] deprecate JSonController and implement AjaxController / ajax-func registry (closes #2110265)
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# copyright 2003-2011 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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"""Set of base controllers, which are directly plugged into the application
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object to handle publication.
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"""
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__docformat__ = "restructuredtext en"
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_ = unicode
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from warnings import warn
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from logilab.common.deprecation import deprecated
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from cubicweb import (NoSelectableObject, ObjectNotFound, ValidationError,
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                      AuthenticationError, typed_eid)
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from cubicweb.utils import json_dumps
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from cubicweb.selectors import (authenticated_user, anonymous_user,
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                                match_form_params)
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from cubicweb.web import Redirect, RemoteCallFailed
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from cubicweb.web.controller import Controller
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from cubicweb.web.views import vid_from_rset
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@deprecated('jsonize is deprecated, use AjaxFunction appobjects instead')
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def jsonize(func):
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    """decorator to sets correct content_type and calls `json_dumps` on
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    results
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    """
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    def wrapper(self, *args, **kwargs):
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        self._cw.set_content_type('application/json')
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        return json_dumps(func(self, *args, **kwargs))
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    wrapper.__name__ = func.__name__
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    return wrapper
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@deprecated('xhtmlize is deprecated, use AjaxFunction appobjects instead')
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def xhtmlize(func):
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    """decorator to sets correct content_type and calls `xmlize` on results"""
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    def wrapper(self, *args, **kwargs):
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        self._cw.set_content_type(self._cw.html_content_type())
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        result = func(self, *args, **kwargs)
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        return ''.join((self._cw.document_surrounding_div(), result.strip(),
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                        u'</div>'))
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    wrapper.__name__ = func.__name__
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    return wrapper
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@deprecated('check_pageid is deprecated, use AjaxFunction appobjects instead')
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def check_pageid(func):
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    """decorator which checks the given pageid is found in the
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    user's session data
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    """
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    def wrapper(self, *args, **kwargs):
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        data = self._cw.session.data.get(self._cw.pageid)
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        if data is None:
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            raise RemoteCallFailed(self._cw._('pageid-not-found'))
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        return func(self, *args, **kwargs)
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    return wrapper
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class LoginController(Controller):
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    __regid__ = 'login'
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    __select__ = anonymous_user()
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    def publish(self, rset=None):
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        """log in the instance"""
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        if self._cw.vreg.config['auth-mode'] == 'http':
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            # HTTP authentication
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            raise AuthenticationError()
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        else:
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            # Cookie authentication
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            return self.appli.need_login_content(self._cw)
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class LogoutController(Controller):
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    __regid__ = 'logout'
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    def publish(self, rset=None):
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        """logout from the instance"""
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        return self.appli.session_handler.logout(self._cw, self.goto_url())
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    def goto_url(self):
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        # * in http auth mode, url will be ignored
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        # * in cookie mode redirecting to the index view is enough : either
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        #   anonymous connection is allowed and the page will be displayed or
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        #   we'll be redirected to the login form
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        msg = self._cw._('you have been logged out')
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        # force base_url so on dual http/https configuration, we generate an url
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        # on the http version of the site
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        return self._cw.build_url('view', vid='loggedout',
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                                  base_url=self._cw.vreg.config['base-url'])
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class ViewController(Controller):
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    """standard entry point :
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    - build result set
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   110
    - select and call main template
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diff changeset
   111
    """
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parents: 3369
diff changeset
   112
    __regid__ = 'view'
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   113
    template = 'main-template'
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parents: 1398
diff changeset
   114
0
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parents:
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   115
    def publish(self, rset=None):
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   116
        """publish a request, returning an encoded string"""
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   117
        view, rset = self._select_view_and_rset(rset)
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diff changeset
   118
        self.add_to_breadcrumbs(view)
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diff changeset
   119
        self.validate_cache(view)
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   120
        template = self.appli.main_template_id(self._cw)
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diff changeset
   121
        return self._cw.vreg['views'].main_template(self._cw, template,
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8eb7883b4223 [pylint] fix a bug of pylint detected errors and i18n pb (calling builtins._ instead of req._)
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parents: 6545
diff changeset
   122
                                                    rset=rset, view=view)
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diff changeset
   123
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diff changeset
   124
    def _select_view_and_rset(self, rset):
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diff changeset
   125
        req = self._cw
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diff changeset
   126
        if rset is None and not hasattr(req, '_rql_processed'):
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diff changeset
   127
            req._rql_processed = True
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5467674ad101 [web] put a fake object that raise Unauthorized on any attribute access as req.cnx and req._user, so we are properly asked to authenticated on any view that tries to do something with one of those attributes (instead of doing defensive programming everywhere we're doing that)
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5223
diff changeset
   128
            if req.cnx:
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2c3e83817a8e [view] add a new entity_call method to entity view protocol, allowing some to work with not yet created entities. Also, start considering 'eid' form parameters where we only consider 'rql', so we can move on bloquing arbitrary rql inputs (more to do on this...)
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5658
diff changeset
   129
                rset = self.process_rql()
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5467674ad101 [web] put a fake object that raise Unauthorized on any attribute access as req.cnx and req._user, so we are properly asked to authenticated on any view that tries to do something with one of those attributes (instead of doing defensive programming everywhere we're doing that)
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5223
diff changeset
   130
            else:
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6abd6e3599f4 #773448: refactor session and 'no connection' handling, by introducing proper web session. We should now be able to see page even when no anon is configured, and be redirected to the login form as soon as one tries to do a query.
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diff changeset
   131
                rset = None
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   132
        vid = req.form.get('vid') or vid_from_rset(req, rset, self._cw.vreg.schema)
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   133
        try:
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diff changeset
   134
            view = self._cw.vreg['views'].select(vid, req, rset=rset)
823
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diff changeset
   135
        except ObjectNotFound:
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diff changeset
   136
            self.warning("the view %s could not be found", vid)
cb8ccbef8fa5 main template refactoring
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diff changeset
   137
            req.set_message(req._("The view %s could not be found") % vid)
3659
993997b4b41d 3.6 update
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parents: 3629
diff changeset
   138
            vid = vid_from_rset(req, rset, self._cw.vreg.schema)
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6b46d73823f5 [api] work in progress, use __regid__, cw_*, etc.
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parents: 3377
diff changeset
   139
            view = self._cw.vreg['views'].select(vid, req, rset=rset)
823
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diff changeset
   140
        except NoSelectableObject:
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parents: 808
diff changeset
   141
            if rset:
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diff changeset
   142
                req.set_message(req._("The view %s can not be applied to this query") % vid)
cb8ccbef8fa5 main template refactoring
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parents: 808
diff changeset
   143
            else:
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a5deac822a13 Bugfix: message was not written in english
Nicolas Chauvat <nicolas.chauvat@logilab.fr>
parents: 2870
diff changeset
   144
                req.set_message(req._("You have no access to this view or it can not "
a5deac822a13 Bugfix: message was not written in english
Nicolas Chauvat <nicolas.chauvat@logilab.fr>
parents: 2870
diff changeset
   145
                                      "be used to display the current data."))
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d7a270f50f54 backport stable branch (one more time painfully)
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parents: 3777 3816
diff changeset
   146
            vid = req.form.get('fallbackvid') or vid_from_rset(req, rset, req.vreg.schema)
d7a270f50f54 backport stable branch (one more time painfully)
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diff changeset
   147
            view = req.vreg['views'].select(vid, req, rset=rset)
823
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diff changeset
   148
        return view, rset
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diff changeset
   149
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diff changeset
   150
    def add_to_breadcrumbs(self, view):
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ca5d09ff0379 [book - #1251259] reorganize plan for basetemplate, talk about class attributes
Stephanie Marcu <stephanie.marcu@logilab.fr>
parents: 6283
diff changeset
   151
        # update breadcrumbs **before** validating cache, unless the view
823
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diff changeset
   152
        # specifies explicitly it should not be added to breadcrumb or the
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diff changeset
   153
        # view is a binary view
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diff changeset
   154
        if view.add_to_breadcrumbs and not view.binary:
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parents: 3377
diff changeset
   155
            self._cw.update_breadcrumbs()
823
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diff changeset
   156
0
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diff changeset
   157
    def execute_linkto(self, eid=None):
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parents:
diff changeset
   158
        """XXX __linkto parameter may cause security issue
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parents:
diff changeset
   159
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parents:
diff changeset
   160
        defined here since custom application controller inheriting from this
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parents:
diff changeset
   161
        one use this method?
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parents:
diff changeset
   162
        """
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parents: 3377
diff changeset
   163
        req = self._cw
0
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parents:
diff changeset
   164
        if not '__linkto' in req.form:
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parents:
diff changeset
   165
            return
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parents:
diff changeset
   166
        if eid is None:
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parents:
diff changeset
   167
            eid = typed_eid(req.form['eid'])
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parents:
diff changeset
   168
        for linkto in req.list_form_param('__linkto', pop=True):
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parents:
diff changeset
   169
            rtype, eids, target = linkto.split(':')
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parents:
diff changeset
   170
            assert target in ('subject', 'object')
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parents:
diff changeset
   171
            eids = eids.split('_')
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parents:
diff changeset
   172
            if target == 'subject':
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diff changeset
   173
                rql = 'SET X %s Y WHERE X eid %%(x)s, Y eid %%(y)s' % rtype
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parents:
diff changeset
   174
            else:
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parents:
diff changeset
   175
                rql = 'SET Y %s X WHERE X eid %%(x)s, Y eid %%(y)s' % rtype
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parents:
diff changeset
   176
            for teid in eids:
5174
78438ad513ca #759035: Automate addition of eid cachekey in RQL analysis
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5159
diff changeset
   177
                req.execute(rql, {'x': eid, 'y': typed_eid(teid)})
0
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parents:
diff changeset
   178
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parents:
diff changeset
   179
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parents: 2079
diff changeset
   180
def _validation_error(req, ex):
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7ded2a1416e4 backport stable branch
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parents: 2144 2255
diff changeset
   181
    req.cnx.rollback()
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Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 4638
diff changeset
   182
    # XXX necessary to remove existant validation error?
aaed3f813ef8 kill dead/useless code as suggested by pylint
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parents: 4638
diff changeset
   183
    # imo (syt), it's not necessary
5223
6abd6e3599f4 #773448: refactor session and 'no connection' handling, by introducing proper web session. We should now be able to see page even when no anon is configured, and be redirected to the login form as soon as one tries to do a query.
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5201
diff changeset
   184
    req.session.data.pop(req.form.get('__errorurl'), None)
2240
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diff changeset
   185
    foreid = ex.entity
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parents: 2079
diff changeset
   186
    eidmap = req.data.get('eidmap', {})
ff84892900ac factorize form validation code, fix pb with validation error in inlined forms during creation
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parents: 2079
diff changeset
   187
    for var, eid in eidmap.items():
ff84892900ac factorize form validation code, fix pb with validation error in inlined forms during creation
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parents: 2079
diff changeset
   188
        if foreid == eid:
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parents: 2079
diff changeset
   189
            foreid = var
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parents: 2079
diff changeset
   190
            break
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parents: 2079
diff changeset
   191
    return (foreid, ex.errors)
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parents: 2079
diff changeset
   192
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eccb7380dc3b [controllers] allow onsuccess / onfailure callback to be passed to validateform
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parents: 3144
diff changeset
   193
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parents: 2079
diff changeset
   194
def _validate_form(req, vreg):
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parents: 2079
diff changeset
   195
    # XXX should use the `RemoteCallFailed` mechanism
ff84892900ac factorize form validation code, fix pb with validation error in inlined forms during creation
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parents: 2079
diff changeset
   196
    try:
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18aec79ec3a3 R [vreg] important refactoring of the vregistry, moving behaviour to end dictionnary (and so leaving room for more flexibility ; keep bw compat ; update api usage in cw
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2559
diff changeset
   197
        ctrl = vreg['controllers'].select('edit', req=req)
2240
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diff changeset
   198
    except NoSelectableObject:
3232
eccb7380dc3b [controllers] allow onsuccess / onfailure callback to be passed to validateform
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diff changeset
   199
        return (False, {None: req._('not authorized')}, None)
2240
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diff changeset
   200
    try:
2255
c346af0727ca more generic way to detect json requests (not yet perfect though)
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2240
diff changeset
   201
        ctrl.publish(None)
2240
ff84892900ac factorize form validation code, fix pb with validation error in inlined forms during creation
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parents: 2079
diff changeset
   202
    except ValidationError, ex:
3232
eccb7380dc3b [controllers] allow onsuccess / onfailure callback to be passed to validateform
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parents: 3144
diff changeset
   203
        return (False, _validation_error(req, ex), ctrl._edited_entity)
2240
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parents: 2079
diff changeset
   204
    except Redirect, ex:
ff84892900ac factorize form validation code, fix pb with validation error in inlined forms during creation
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parents: 2079
diff changeset
   205
        try:
ff84892900ac factorize form validation code, fix pb with validation error in inlined forms during creation
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parents: 2079
diff changeset
   206
            req.cnx.commit() # ValidationError may be raise on commit
ff84892900ac factorize form validation code, fix pb with validation error in inlined forms during creation
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2079
diff changeset
   207
        except ValidationError, ex:
3232
eccb7380dc3b [controllers] allow onsuccess / onfailure callback to be passed to validateform
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parents: 3144
diff changeset
   208
            return (False, _validation_error(req, ex), ctrl._edited_entity)
3571
54743fc6172c [json validation] catch everything here
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3518
diff changeset
   209
        except Exception, ex:
54743fc6172c [json validation] catch everything here
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parents: 3518
diff changeset
   210
            req.cnx.rollback()
54743fc6172c [json validation] catch everything here
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 3518
diff changeset
   211
            req.exception('unexpected error while validating form')
6107
05061eda1fa7 [web controller] don't try to translate arbitrary exception message
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5940
diff changeset
   212
            return (False, str(ex).decode('utf-8'), ctrl._edited_entity)
2240
ff84892900ac factorize form validation code, fix pb with validation error in inlined forms during creation
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parents: 2079
diff changeset
   213
        else:
3608
5a46e68c3d3c [editcontroller] backout (sort of) removal of entity.complete() in validate_form
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 3599
diff changeset
   214
            # complete entity: it can be used in js callbacks where we might
5a46e68c3d3c [editcontroller] backout (sort of) removal of entity.complete() in validate_form
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 3599
diff changeset
   215
            # want every possible information
5a46e68c3d3c [editcontroller] backout (sort of) removal of entity.complete() in validate_form
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 3599
diff changeset
   216
            if ctrl._edited_entity:
5a46e68c3d3c [editcontroller] backout (sort of) removal of entity.complete() in validate_form
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parents: 3599
diff changeset
   217
                ctrl._edited_entity.complete()
3232
eccb7380dc3b [controllers] allow onsuccess / onfailure callback to be passed to validateform
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            return (True, ex.location, ctrl._edited_entity)
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    except Exception, ex:
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        req.cnx.rollback()
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        req.exception('unexpected error while validating form')
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        return (False, str(ex).decode('utf-8'), ctrl._edited_entity)
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    return (False, '???', None)
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class FormValidatorController(Controller):
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    __regid__ = 'validateform'
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    def response(self, domid, status, args, entity):
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        callback = str(self._cw.form.get('__onsuccess', 'null'))
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        errback = str(self._cw.form.get('__onfailure', 'null'))
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        cbargs = str(self._cw.form.get('__cbargs', 'null'))
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        self._cw.set_content_type('text/html')
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        jsargs = json_dumps((status, args, entity))
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        return """<script type="text/javascript">
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 window.parent.handleFormValidationResponse('%s', %s, %s, %s, %s);
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</script>""" %  (domid, callback, errback, jsargs, cbargs)
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    def publish(self, rset=None):
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        self._cw.ajax_request = True
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        # XXX unclear why we have a separated controller here vs
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        # js_validate_form on the json controller
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        status, args, entity = _validate_form(self._cw, self._cw.vreg)
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        domid = self._cw.form.get('__domid', 'entityForm').encode(
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            self._cw.encoding)
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        return self.response(domid, status, args, entity)
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class JSonController(Controller):
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    __regid__ = 'json'
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    def publish(self, rset=None):
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        warn('[3.15] JSONController is deprecated, use AjaxController instead',
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             DeprecationWarning)
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        ajax_controller = self._cw.vreg['controllers'].select('ajax', self._cw, appli=self.appli)
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        return ajax_controller.publish(rset)
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# XXX move to massmailing
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class MailBugReportController(Controller):
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    __regid__ = 'reportbug'
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    __select__ = match_form_params('description')
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    def publish(self, rset=None):
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        req = self._cw
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        self.sendmail(req.vreg.config['submit-mail'],
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                      req._('%s error report') % req.vreg.config.appid,
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                      req.form['description'])
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        raise Redirect(req.build_url(__message=req._('bug report sent')))
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class UndoController(Controller):
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    __regid__ = 'undo'
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    __select__ = authenticated_user() & match_form_params('txuuid')
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    def publish(self, rset=None):
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        txuuid = self._cw.form['txuuid']
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        errors = self._cw.cnx.undo_transaction(txuuid)
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        if not errors:
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            self.redirect()
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        raise ValidationError(None, {None: '\n'.join(errors)})
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    def redirect(self, msg=None):
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        req = self._cw
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        msg = msg or req._("transaction undone")
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        breadcrumbs = req.session.data.get('breadcrumbs', None)
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        if breadcrumbs is not None and len(breadcrumbs) > 1:
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            url = req.rebuild_url(breadcrumbs[-2], __message=msg)
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        else:
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            url = req.build_url(__message=msg)
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        raise Redirect(url)