Ajout apis

catalog/models.py

@@ -37,7 +37,8 @@ class Subject(models.Model):
 
     @staticmethod
     def available_subjects():
-        return Subject.objects.annotate(available_resource_count=Count(Q(resources__dead_entry_point=False))).filter(
+        return Subject.objects.annotate(available_resource_count=Count('resources',filter=Q(
+                                                                       resources__dead_entry_point=False))).filter(
             available_resource_count__gt=0)