default ordering for BO establishments search

apps/search_indexes/serializers.py

@@ -313,6 +313,15 @@ class EstablishmentDocumentSerializer(InFavoritesMixin, DocumentSerializer):
         )
 
 
+class EstablishmentBackOfficeDocumentSerializer(EstablishmentDocumentSerializer):
+
+    class Meta(EstablishmentDocumentSerializer.Meta):
+        document = EstablishmentDocumentSerializer.Meta.document
+        fields = EstablishmentDocumentSerializer.Meta.fields + (
+            'created',
+        )
+
+
 class ProductDocumentSerializer(InFavoritesMixin):
     """Product document serializer"""
 

apps/search_indexes/views.py

@@ -1,5 +1,5 @@
 """Search indexes app views."""
-from django_elasticsearch_dsl_drf import constants
+from django_elasticsearch_dsl_drf import constants, pagination
 from django_elasticsearch_dsl_drf.filter_backends import (
     FilteringFilterBackend,
     GeoSpatialOrderingFilterBackend,
@@ -321,14 +321,26 @@ class EstablishmentDocumentViewSet(BaseDocumentViewSet):
 
 class EstablishmentBackOfficeViewSet(EstablishmentDocumentViewSet):
 
-    filter_backends = EstablishmentDocumentViewSet.filter_backends + [
-        OrderingFilterBackend
-    ]
+    def get_queryset(self):
+        if not self.request.query_params.get('search'):
+            self.request.GET._mutable = True
+            self.request.query_params.update({
+                'ordering': '-created',
+            })
+            self.request.GET._mutable = False
+        return super(EstablishmentBackOfficeViewSet, self).get_queryset()
 
+    serializer_class = serializers.EstablishmentBackOfficeDocumentSerializer
+    pagination_class = pagination.PageNumberPagination
+    filter_backends = [
+        FilteringFilterBackend,
+        filters.CustomSearchFilterBackend,
+        filters.CustomGeoSpatialFilteringFilterBackend,
+        GeoSpatialOrderingFilterBackend,
+        OrderingFilterBackend,
+    ]
     ordering_fields = {
-        'created': {
-            'field': 'created'
-        }
+        'created': 'created',
     }