Disallows users, who have delegated their votes to others, to selfvote. It is enforced, that the user who gets the vote right must vote for the right-provder.

server/openslides/poll/views.py

@@ -255,15 +255,29 @@ class BasePollViewSet(ModelViewSet):
         Analog:                     has to have manage permissions
         Named & Pseudoanonymous:    has to be in a poll group and present
         """
+        # if the request user is not the vote user, the delegation must be right
         if request.user != vote_user and request.user != vote_user.vote_delegated_to:
-            self.permission_denied(request)
+            raise ValidationError(
+                {
+                    "detail": f"You cannot vote for {vote_user.id} since the vote right was not delegated to you."
+                }
+            )
+
+        # If the request user is the vote user, this user must not have any delegation.
+        # It is not allowed to vote for oneself, if the vote is delegated
+        if request.user == vote_user and request.user.vote_delegated_to is not None:
+            raise ValidationError(
+                {"detail": "You cannot vote since your vote right is delegated."}
+            )
 
         if poll.type == BasePoll.TYPE_ANALOG:
             if not self.has_manage_permissions():
                 self.permission_denied(request)
         else:
             if poll.state != BasePoll.STATE_STARTED:
-                raise ValidationError("You can only vote on a started poll.")
+                raise ValidationError(
+                    {"detail": "You can only vote on a started poll."}
+                )
 
             if not request.user.is_present or not in_some_groups(
                 vote_user.id,

server/tests/integration/assignments/test_polls.py

@@ -470,9 +470,9 @@ class CreateAssignmentPoll(TestCase):
         poll = AssignmentPoll.objects.get()
         self.assertEqual(poll.state, AssignmentPoll.STATE_PUBLISHED)
         self.assertTrue(AssignmentVote.objects.exists())
-        self.assertEquals(poll.amount_global_yes, Decimal("1"))
-        self.assertEquals(poll.amount_global_no, Decimal("2"))
-        self.assertEquals(poll.amount_global_abstain, Decimal("3"))
+        self.assertEqual(poll.amount_global_yes, Decimal("1"))
+        self.assertEqual(poll.amount_global_no, Decimal("2"))
+        self.assertEqual(poll.amount_global_abstain, Decimal("3"))
         option = poll.options.get(pk=1)
         self.assertEqual(option.yes, Decimal("0"))
         self.assertEqual(option.no, Decimal("1"))

server/tests/integration/motions/test_polls.py

@@ -897,14 +897,13 @@ class VoteMotionPollNamed(TestCase):
         self.start_poll()
         self.make_admin_delegate()
         self.make_admin_present()
-        user, _ = self.create_user()
-        user.groups.add(GROUP_DELEGATE_PK)
+        self.user, self.user_password = self.create_user()
+        self.user.groups.add(GROUP_DELEGATE_PK)
         if with_delegation:
-            user.vote_delegated_to = self.admin
-        user.save()
+            self.user.vote_delegated_to = self.admin
+        self.user.save()
         inform_changed_data(self.admin)  # put the admin into the cache to update
         # its vote_delegated_to_id field
-        self.user = user
 
     def test_vote_delegation(self):
         self.setup_vote_delegation()
@@ -958,7 +957,7 @@ class VoteMotionPollNamed(TestCase):
             reverse("motionpoll-vote", args=[self.poll.pk]),
             {"data": "N", "user_id": self.user.pk},
         )
-        self.assertHttpStatusVerbose(response, status.HTTP_403_FORBIDDEN)
+        self.assertHttpStatusVerbose(response, status.HTTP_400_BAD_REQUEST)
         self.assertFalse(MotionPoll.objects.get().get_votes().exists())
 
     def test_vote_delegation_not_present(self):
@@ -972,7 +971,7 @@ class VoteMotionPollNamed(TestCase):
         self.assertHttpStatusVerbose(response, status.HTTP_403_FORBIDDEN)
         self.assertFalse(MotionPoll.objects.get().get_votes().exists())
 
-    def test_vote_delegation_delegatee_not_in_group(self):
+    def test_vote_delegation_delegate_not_in_group(self):
         self.setup_vote_delegation()
         self.admin.groups.remove(GROUP_DELEGATE_PK)
         self.admin.save()
@@ -999,6 +998,23 @@ class VoteMotionPollNamed(TestCase):
         self.assertHttpStatusVerbose(response, status.HTTP_403_FORBIDDEN)
         self.assertFalse(MotionPoll.objects.get().get_votes().exists())
 
+    def test_vote_delegation_delegator_self_vote_not_allowed(self):
+        self.setup_vote_delegation()
+        # Make the user a delegate and present
+        self.admin.groups.add(GROUP_DELEGATE_PK)
+        self.admin.groups.remove(GROUP_ADMIN_PK)
+        self.user.is_present = True
+        self.user.save()
+        # Use the user to make the request to vote for himself
+        user_client = APIClient()
+        user_client.login(username=self.user.username, password=self.user_password)
+        response = user_client.post(
+            reverse("motionpoll-vote", args=[self.poll.pk]),
+            {"data": "N"},
+        )
+        self.assertHttpStatusVerbose(response, status.HTTP_400_BAD_REQUEST)
+        self.assertFalse(MotionPoll.objects.get().get_votes().exists())
+
 
 class VoteMotionPollNamedAutoupdates(TestCase):
     """3 important users: