fix naming crash

tournaments/models/tournament.py

@@ -1013,9 +1013,9 @@ class Tournament(BaseModel):
     def is_build_and_not_empty(self):
         if hasattr(self, '_prefetched_objects_cache'):
             # Use prefetched data if available
-            has_group_stages = 'groupstage_set' in self._prefetched_objects_cache and len(self.group_stages.all()) > 0
-            has_rounds = 'round_set' in self._prefetched_objects_cache and len(self.rounds.all()) > 0
-            has_team_registrations = 'teamregistration_set' in self._prefetched_objects_cache and len(self.team_registrations.all()) >= 4
+            has_group_stages = 'group_stages' in self._prefetched_objects_cache and len(self.group_stages.all()) > 0
+            has_rounds = 'rounds' in self._prefetched_objects_cache and len(self.rounds.all()) > 0
+            has_team_registrations = 'team_registrations' in self._prefetched_objects_cache and len(self.team_registrations.all()) >= 4
         else:
             # Fall back to database queries if not prefetched
             has_group_stages = self.group_stages.count() > 0

tournaments/views.py

@@ -159,9 +159,9 @@ def tournaments_query(query, club_id, ascending, limit=None):
         sortkey = '-start_date'
 
     queryset = Tournament.objects.filter(*queries).prefetch_related(
-        'groupstage_set',
-        'round_set',
-        'teamregistration_set',
+        'group_stages',
+        'rounds',
+        'team_registrations',
     ).order_by(sortkey)
 
     # Apply limit directly in the database query