some updates

generic/models.py

@@ -496,7 +496,12 @@ class SeriesBase(models.Model):
                 return format_html('", "'.join(images))
 
     def get_thumbnail(self, recreate=False, fail_loudly=False):
-        images = self.images.filter(removed=False)
+        # Use prefetched images if available
+        images = getattr(self, '_prefetched_objects_cache', {}).get('images')
+        if images is not None:
+            images = [img for img in images if not img.removed]
+        else:
+            images = self.images.filter(removed=False)
 
         if len(images) < 1:
             return "No images", 0

generic/views.py

@@ -2377,7 +2377,6 @@ class ExamViews(View, LoginRequiredMixin):
         cached_scores = True
 
         valid_cid_users = set(exam.valid_cid_users.all().values_list("cid", flat=True))
-        print(valid_cid_users)
         valid_user_users = set(exam.valid_user_users.all().values_list("pk", flat=True))
 
         if self.app_name in ("rapids"):
@@ -2403,7 +2402,6 @@ class ExamViews(View, LoginRequiredMixin):
         user_ids = set()
 
         cids_user_id_map = {}
-        cids_name_map = {}
 
         # Loop through all candidates
         for cid_user_answer in cid_user_answers: