Fixes a permission for the reviewer

core/views/feedback.py

@@ -31,14 +31,14 @@ class FeedbackApiView(
 
     def _get_implicit_assignment_for_user(self, submission):
         """ Check for tutor if it exists. Not relevant for reviewer """
-        if self.request.user.role == models.UserAccount.REVIEWER:
-            return
         try:
             return models.TutorSubmissionAssignment.objects.get(
                 subscription__owner=self.request.user,
                 submission=submission
             )
         except models.TutorSubmissionAssignment.DoesNotExist:
+            if self.request.user.role == models.UserAccount.REVIEWER:
+                return None
             raise PermissionDenied(
                 detail='This user has no permission to create this feedback')
 
@@ -59,6 +59,8 @@ class FeedbackApiView(
         return assignment == youngest
 
     def _tutor_attempts_to_patch_first_feedback_final(self, serializer):
+        if self.request.user.role == models.UserAccount.REVIEWER:
+            return False
         is_final_set = serializer.validated_data.get('is_final', False)
         submission = self.get_object().of_submission
         assignment = self._get_implicit_assignment_for_user(submission)