Added new field rank to collection

apps/collection/models.py

@@ -80,6 +80,8 @@ class Collection(ProjectBaseMixin, CollectionDateMixin,
                             verbose_name=_('Collection slug'), editable=True, null=True)
     old_id = models.IntegerField(null=True, blank=True)
 
+    rank = models.IntegerField(null=True, default=None)
+
     objects = CollectionQuerySet.as_manager()
 
     class Meta:

apps/collection/serializers/back.py

@@ -40,6 +40,7 @@ class CollectionBackOfficeSerializer(CollectionBaseSerializer):
             # 'end',
             'count_related_objects',
             'related_object_names',
+            'rank',
         ]
 
 

apps/collection/views/back.py

@@ -1,6 +1,7 @@
 from rest_framework import generics
 from rest_framework import permissions
-from rest_framework import viewsets, mixins
+from rest_framework import viewsets
+from rest_framework.response import Response
 
 from collection import models
 from collection.serializers import back as serializers
@@ -49,6 +50,11 @@ class CollectionBackOfficeViewSet(mixins.CreateModelMixin,
         elif obj_type == self.bind_object_serializer_class.PRODUCT:
             collection.products.remove(related_object)
 
+    def list(self, request, *args, **kwargs):
+        queryset = self.filter_queryset(self.get_queryset()).order_by('rank', '-start')
+        serializer = self.get_serializer(queryset, many=True)
+        return Response(serializer.data)
+
 
 class CollectionBackOfficeView(generics.GenericAPIView):
     """ViewS for Collection model."""