[SHARE- ][Fix] Prefetch related API rows

Author: chrisseto

api/serializers.py

@@ -28,12 +28,6 @@ def __init__(self, *args, **kwargs):
                 if 'version' in field_name or field_name in excluded_fields:
                     self.fields.pop(field_name)
 
-            if not version_serializer:
-                # add links to related objects
-                self.fields.update({
-                    'links': fields.LinksField(links=self.Meta.links, source='*')
-                })
-
         # version specific fields
         if version_serializer:
             self.fields.update({

api/urls.py

@@ -48,7 +48,13 @@ def generate_serializer(self, subclass):
 
     def generate_viewset(self, subclass, serializer):
         class_name = subclass.__name__ + 'ViewSet'
-        queryset = serializer.Meta.model.objects.all().select_related('extra')
+        # Pre-join all fields foreign keys
+        # Note: we can probably avoid this all together if we fix DRF
+        # We don't need to load the entire objects, just the PKs
+        queryset = serializer.Meta.model.objects.all().select_related(*(
+            field.name for field in serializer.Meta.model._meta.get_fields()
+            if field.is_relation and field.editable and not field.many_to_many
+        ))
         if subclass.__name__ == 'AgentIdentifier':
             queryset = queryset.exclude(scheme='mailto')