Added submissiontype_id field to submission serializer

This is needed for correct routing in the frontend

core/serializers.py

@@ -35,12 +35,13 @@ class SubmissionTypeSerializer(serializers.ModelSerializer):
 class SubmissionSerializer(serializers.ModelSerializer):
     feedback = serializers.ReadOnlyField(source='feedback.text')
     score = serializers.ReadOnlyField(source='feedback.score')
-    type = serializers.ReadOnlyField(source='type.name')
+    type_id = serializers.ReadOnlyField(source='type.id')
+    type_name = serializers.ReadOnlyField(source='type.name')
     full_score = serializers.ReadOnlyField(source='type.full_score')
 
     class Meta:
         model = Submission
-        fields = ('type', 'text', 'feedback', 'score', 'full_score')
+        fields = ('type_id', 'type_name', 'text', 'feedback', 'score', 'full_score')
 
 
 class StudentSerializer(serializers.ModelSerializer):