Resolve "Clarification System"

Closes #84 (closed)

core/serializers/submission_type.py

@@ -40,7 +40,7 @@ class SolutionCommentSerializer(DynamicFieldsModelSerializer):
             'of_line',
             'of_submission_type'
         )
-        read_only_fields = ('pk', 'created',)
+        read_only_fields = ('pk', 'created', 'of_user')
         list_serializer_class = CommentDictionarySerializer
 
 
@@ -51,7 +51,7 @@ class SubmissionTypeListSerializer(DynamicFieldsModelSerializer):
         fields = ('pk', 'name', 'full_score')
 
 
-class SubmissionTypeSerializer(SubmissionTypeListSerializer):
+class SubmissionTypeSerializer(DynamicFieldsModelSerializer):
     solution_comments = SolutionCommentSerializer(many=True, required=False)
 
     class Meta: