CMFActivity: make script with proxy roles usable as a grouping method

product/CMFActivity/ActivityTool.py

@@ -453,6 +453,7 @@ class GroupedMessage(object):
 
 # XXX: Allowing restricted code to implement a grouping method is questionable
 #      but there already exist some.
+  __parent__ = property(lambda self: self.object) # for object
   _guarded_writes = 1 # for result
 allow_class(GroupedMessage)
 

product/CMFActivity/tests/testCMFActivity.py

@@ -3106,12 +3106,15 @@ class TestCMFActivity(ERP5TypeTestCase, LogInterceptor):
   def test_restrictedGroupMethod(self):
     skin = self.portal.portal_skins.custom
     script_id = self.id()
-    createZODBPythonScript(skin, script_id, "message_list", """if 1:
+    script = createZODBPythonScript(skin, script_id, "message_list", """if 1:
       for m in message_list:
         m.result = m.object.getProperty(*m.args, **m.kw)
     """)
+    script.manage_proxy(("Manager",))
     obj = self.portal.portal_activities.newActiveProcess(causality_value_list=(
       self.portal.person_module, self.portal.organisation_module))
+    obj.manage_permission('Access contents information', ['Manager'])
+    self.logout()
     foo = obj.activate(activity='SQLQueue',
                        group_method_id=script_id,
                        active_process=obj.getPath()).foo