ordering for backoffice establishments

apps/search_indexes/views.py

@@ -325,6 +325,12 @@ class EstablishmentBackOfficeViewSet(EstablishmentDocumentViewSet):
         OrderingFilterBackend
     ]
 
+    ordering_fields = {
+        'created': {
+            'field': 'created'
+        }
+    }
+
 
 class MobileEstablishmentDocumentViewSet(EstablishmentDocumentViewSet):
 
@@ -335,12 +341,6 @@ class MobileEstablishmentDocumentViewSet(EstablishmentDocumentViewSet):
         GeoSpatialOrderingFilterBackend,
     ]
 
-    ordering_fields = {
-        'created': {
-            'field': 'created'
-        }
-    }
-
 
 class ProductDocumentViewSet(BaseDocumentViewSet):
     """Product document ViewSet."""