Added back collections method for collection detail

apps/collection/urls/back.py

@@ -1,4 +1,5 @@
 """Collection common urlpaths."""
+from django.urls import path
 from rest_framework.routers import SimpleRouter
 
 from collection.views import back as views
@@ -7,4 +8,9 @@ app_name = 'collection'
 router = SimpleRouter()
 router.register(r'', views.CollectionBackOfficeViewSet)
 
-urlpatterns = router.urls
+urlpatterns = [
+    path('/<int:pk>/', views.CollectionBackOfficeView.as_view(), name='detail'),
+]
+
+urlpatterns += router.urls
+

apps/collection/views/back.py

@@ -1,3 +1,4 @@
+from rest_framework import generics
 from rest_framework import permissions
 from rest_framework import viewsets, mixins
 
@@ -47,3 +48,12 @@ class CollectionBackOfficeViewSet(mixins.CreateModelMixin,
             collection.establishments.remove(related_object)
         elif obj_type == self.bind_object_serializer_class.PRODUCT:
             collection.products.remove(related_object)
+
+
+class CollectionBackOfficeView(generics.GenericAPIView):
+    """ViewS for Collection model."""
+
+    pagination_class = None
+    permission_classes = (permissions.IsAuthenticated,)
+    queryset = models.Collection.objects.all()
+    serializer_class = serializers.CollectionBackOfficeSerializer