Return subject name instead of whole subject from backend

aleksis/apps/chronos/schema/__init__.py

@@ -186,7 +186,8 @@ class SubstitutionType(graphene.ObjectType):
         elif not le.amends.subject and not le.subject:
             return le.amends.title
         else:
-            return le.amends.subject or le.subject
+            subject = le.amends.subject or le.subject
+            return subject.short_name or subject.name
 
     def resolve_new_subject(root, info):
         le = root['REFERENCE_OBJECT']
@@ -195,7 +196,7 @@ class SubstitutionType(graphene.ObjectType):
         elif not le.amends.subject and not le.subject:
             return le.title
         elif le.subject and le.amends.subject:
-            return le.subject
+            return le.subject.short_name or le.subject.name
         else:
             return None