Added what I belive should work

gameserver/models/contest.py

@@ -421,25 +421,16 @@ def save(self, *args, **kwargs):
 from django.contrib.auth.models import User
 
 class ContestScore(models.Model):
-    user = models.ForeignKey(User, on_delete=models.CASCADE, null=True, blank=True)
-    team = models.ForeignKey(Team, on_delete=models.CASCADE, null=True, blank=True)
-    contest = models.ForeignKey(Contest, on_delete=models.CASCADE) 
+    participation=models.ForeignKey(ContestParticipation, on_delete=CASCADE, db_index=True)
     points = models.PositiveIntegerField(help_text="The amount of points.", default=0)
     flag_count = models.PositiveIntegerField(help_text="The amount of flags the user/team has.", default=0)
 
     @classmethod
-    def update_or_create(cls, change_in_score: int, contest: Contest, user: Optional[User] = None, team: Optional[Team] = None, update_flags: bool = True):
-
-        if not user and not team:
-            raise ValueError("You must specify either a user or a team")
-
-        queryset = cls.objects.filter(contest=contest)
-        if user:
-            queryset = queryset.filter(user=user)
-        elif team:
-            queryset = queryset.filter(team=team)
+    def update_or_create(cls, change_in_score: int, participant: ContestParticipation, update_flags: bool = True):
+        queryset = cls.objects.filter(participation=participant)
+
         if not queryset.exists(): # no user/team found matching that
-            cls.objects.create(contest=contest, user=user, team=team, flag_count=int(update_flags), points=change_in_score) 
+            cls.objects.create(participation=participant, flag_count=int(update_flags), points=change_in_score) 
             return cls.update_or_create(contest=contest, change_in_score=change_in_score, user=user, team=team, update_flags=update_flags)
 
         with transaction.atomic():
@@ -448,10 +439,4 @@ def update_or_create(cls, change_in_score: int, contest: Contest, user: Optional
             if update_flags:
                 queryset.update(points=F('points') + change_in_score)   
             else:
-                queryset.update(points=F('points') + change_in_score, flag_count=F('flag_count') + 1)   
-
-    class Meta:
-        indexes = [
-            models.Index(fields=['user', 'contest']),  # Composite index for user and contest
-            models.Index(fields=['team', 'contest']),  # Composite index for team and contest
-        ]
+                queryset.update(points=F('points') + change_in_score, flag_count=F('flag_count') + 1)   

gameserver/views/problem.py

@@ -145,7 +145,8 @@ def _create_submission_object(self, form, is_correct=None):
                 submission=submission,
                 participation=self.request.participation,
             )
-            #models.ContestScore.
+            if is_correct:
+                models.ContestScore.update_or_create(participation=self.request.participation, change_in_points = self.object.points, update_flags=True)
         return submission
 
     def get_form_kwargs(self, *args, **kwargs):