removed race condition & cleanup

client/src/app/shared/models/users/user.ts

@@ -42,6 +42,6 @@ export class User extends BaseDecimalModel<User> {
     }
 
     protected getDecimalFields(): string[] {
-        return ["vote_weight"];
+        return ['vote_weight'];
     }
 }

openslides/assignments/views.py

@@ -2,7 +2,6 @@ from decimal import Decimal
 
 from django.contrib.auth import get_user_model
 from django.db import transaction
-from django.db.utils import IntegrityError
 
 from openslides.poll.views import BaseOptionViewSet, BasePollViewSet, BaseVoteViewSet
 from openslides.utils.auth import has_perm
@@ -526,17 +525,11 @@ class AssignmentPollViewSet(BasePollViewSet):
 
         poll.voted.add(check_user)
 
+    def add_user_to_voted_array(self, user, poll):
+        VotedModel = AssignmentPoll.voted.through
+        VotedModel.objects.create(assignmentpoll=poll, user=user)
+
     def handle_named_vote(self, data, poll, user):
-        try:
-            with transaction.atomic():
-                return self.try_handle_named_vote(data, poll, user)
-        except IntegrityError:
-            raise ValidationError({"detail": "You have already voted"})
-
-    def try_handle_named_vote(self, data, poll, user):
-        if user in poll.voted.all():
-            raise ValidationError({"detail": "You have already voted"})
-
         if poll.pollmethod == AssignmentPoll.POLLMETHOD_VOTES:
             self.create_votes_type_votes(data, poll, user)
         elif poll.pollmethod in (
@@ -546,16 +539,6 @@ class AssignmentPollViewSet(BasePollViewSet):
             self.create_votes_type_named_pseudoanonymous(data, poll, user, user)
 
     def handle_pseudoanonymous_vote(self, data, poll, user):
-        try:
-            with transaction.atomic():
-                return self.try_handle_pseudoanonymous_vote(data, poll, user)
-        except IntegrityError:
-            raise ValidationError({"detail": "You have already voted"})
-
-    def try_handle_pseudoanonymous_vote(self, data, poll, user):
-        if user in poll.voted.all():
-            raise ValidationError({"detail": "You have already voted"})
-
         if poll.pollmethod == AssignmentPoll.POLLMETHOD_VOTES:
             self.create_votes_type_votes(data, poll, user)
 

openslides/motions/views.py

@@ -1176,6 +1176,10 @@ class MotionPollViewSet(BasePollViewSet):
 
         return result
 
+    def add_user_to_voted_array(self, user, poll):
+        VotedModel = MotionPoll.voted.through
+        VotedModel.objects.create(motionpoll=poll, user=user)
+
     def handle_analog_vote(self, data, poll, user):
         option = poll.options.get()
         vote, _ = MotionVote.objects.get_or_create(option=option, value="Y")
@@ -1223,21 +1227,11 @@ class MotionPollViewSet(BasePollViewSet):
                 raise ValidationError("Data must be Y or N")
 
     def handle_named_vote(self, data, poll, user):
-        if user in poll.voted.all():
-            raise ValidationError({"detail": "You have already voted"})
-        poll.voted.add(user)
-        poll.save()
-
         option = poll.options.get()
         vote = MotionVote.objects.create(user=user, option=option)
         self.handle_named_and_pseudoanonymous_vote(data, user, poll, option, vote)
 
     def handle_pseudoanonymous_vote(self, data, poll, user):
-        if user in poll.voted.all():
-            raise ValidationError({"detail": "You have already voted"})
-        poll.voted.add(user)
-        poll.save()
-
         option = poll.options.get()
         vote = MotionVote.objects.create(user=None, option=option)
         self.handle_named_and_pseudoanonymous_vote(data, user, poll, option, vote)

openslides/poll/views.py

@@ -2,6 +2,7 @@ from textwrap import dedent
 
 from django.contrib.auth.models import AnonymousUser
 from django.db import transaction
+from django.db.utils import IntegrityError
 from rest_framework import status
 
 from openslides.utils.auth import in_some_groups
@@ -184,6 +185,7 @@ class BasePollViewSet(ModelViewSet):
         return Response()
 
     @detail_route(methods=["POST"])
+    @transaction.atomic
     def vote(self, request, pk):
         """
         For motion polls: Just "Y", "N" or "A" (if pollmethod is "YNA")
@@ -219,10 +221,10 @@ class BasePollViewSet(ModelViewSet):
 
     def assert_can_vote(self, poll, request):
         """
-        Raises a permission denied, if the user is not allowed to vote.
+        Raises a permission denied, if the user is not allowed to vote (or has already voted).
+        Adds the user to the voted array, so this needs to be reverted on error!
         Analog:                     has to have manage permissions
         Named & Pseudoanonymous:    has to be in a poll group and present
-        Note: For pseudoanonymous it is *not* tested, if the user has already voted!
         """
         if poll.type == BasePoll.TYPE_ANALOG:
             if not self.has_manage_permissions():
@@ -231,11 +233,17 @@ class BasePollViewSet(ModelViewSet):
             if poll.state != BasePoll.STATE_STARTED:
                 raise ValidationError("You can only vote on a started poll.")
             if not request.user.is_present or not in_some_groups(
-               request.user.id,
+                request.user.id,
-               list(poll.groups.values_list("pk", flat=True)),
+                list(poll.groups.values_list("pk", flat=True)),
-               exact=True,
+                exact=True,
             ):
-               self.permission_denied(request)
+                self.permission_denied(request)
+
+            try:
+                self.add_user_to_voted_array(request.user, poll)
+                inform_changed_data(poll)
+            except IntegrityError:
+                raise ValidationError({"detail": "You have already voted"})
 
     def parse_vote_value(self, obj, key):
         """ Raises a ValidationError on incorrect values, including None """
@@ -257,6 +265,13 @@ class BasePollViewSet(ModelViewSet):
         """
         pass
 
+    def add_user_to_voted_array(self, user, poll):
+        """
+        To be implemented by subclass. Adds the given user to the voted array of the given poll.
+        Throws an IntegrityError if the user already exists in the array
+        """
+        raise NotImplementedError()
+
     def validate_vote_data(self, data, poll, user):
         """
         To be implemented by subclass. Validates the data according to poll type and method and fields by validated versions.