Added guides binding objects

apps/collection/serializers/back.py

@@ -1,6 +1,7 @@
 from rest_framework import serializers
 
 from collection import models
+from collection.models import Guide
 from collection.serializers.common import CollectionBaseSerializer
 from establishment.models import Establishment
 from location.models import Country
@@ -97,3 +98,54 @@ class CollectionBindObjectSerializer(serializers.Serializer):
                 raise RemovedBindingObjectNotFound()
             attrs['related_object'] = product
         return attrs
+
+
+class GuideBindObjectSerializer(serializers.Serializer):
+    """Serializer for binding guide and objects"""
+
+    GUIDE = 'guide'
+    PRODUCT = 'product'
+
+    TYPE_CHOICES = (
+        (GUIDE, 'Guide'),
+        (PRODUCT, 'Product'),
+    )
+
+    type = serializers.ChoiceField(TYPE_CHOICES)
+    object_id = serializers.IntegerField()
+
+    def validate(self, attrs):
+        view = self.context.get('view')
+        request = self.context.get('request')
+
+        obj_type = attrs.get('type')
+        obj_id = attrs.get('object_id')
+
+        guide = view.get_object()
+        attrs['guide'] = guide
+
+        if obj_type == self.GUIDE:
+            guide = Guide.objects.filter(pk=obj_id).first()
+            if not guide:
+                raise BindingObjectNotFound()
+            if request.method == 'POST' and guide.establishments.filter(pk=guide.pk).exists():
+                raise ObjectAlreadyAdded()
+            if request.method == 'DELETE' and not guide. \
+                    establishments.filter(pk=guide.pk). \
+                    exists():
+                raise RemovedBindingObjectNotFound()
+            attrs['related_object'] = guide
+
+        elif obj_type == self.PRODUCT:
+            product = Product.objects.filter(pk=obj_id).first()
+            if not product:
+                raise BindingObjectNotFound()
+            if request.method == 'POST' and guide.products. \
+                    filter(pk=product.pk).exists():
+                raise ObjectAlreadyAdded()
+            if request.method == 'DELETE' and not guide.products. \
+                    filter(pk=product.pk).exists():
+                raise RemovedBindingObjectNotFound()
+            attrs['related_object'] = product
+
+        return attrs

apps/collection/urls/back.py

@@ -30,4 +30,6 @@ urlpatterns = [
          name='guide-export-xml'),
     path('guides/<int:pk>/export-doc/', views.GuideElementExportDOCView.as_view(),
          name='guide-export-doc'),
+    path('guides/<int:pk>/bind-object/', views.GuideBackOfficeList.as_view(),
+         name='guide-bind-object')
 ] + router.urls

apps/collection/views/back.py

@@ -1,11 +1,9 @@
 from django.shortcuts import get_object_or_404
 from django.utils.translation import gettext_lazy as _
-from rest_framework import generics
+from rest_framework import generics, mixins, permissions, status, viewsets
-from rest_framework import mixins, permissions, viewsets
-from rest_framework import status
 from rest_framework.response import Response
 
-from collection import models, serializers, filters, tasks
+from collection import filters, models, serializers, tasks
 from utils.methods import get_permission_classes
 from utils.views import BindObjectMixin
 
@@ -105,9 +103,41 @@ class GuideListCreateView(GuideBaseView,
     filter_class = filters.GuideFilterSet
 
 
+class GuideBackOfficeList(BindObjectMixin, GuideBaseView):
+    """ViewSet for Guides list for BackOffice users"""
+    pagination_class = None
+    filter_class = filters.GuideFilterSet
+    bind_object_serializer_class = serializers.GuideBindObjectSerializer
+
+    def perform_binding(self, serializer):
+        data = serializer.validated_data
+        guide = data.pop('guide')
+        obj_type = data.get('type')
+        related_object = data.get('related_object')
+
+        if obj_type == self.bind_object_serializer_class.GUIDE:
+            guide.establishments.add(related_object)
+
+        elif obj_type == self.bind_object_serializer_class.PRODUCT:
+            guide.products.add(related_object)
+
+    def perform_unbinding(self, serializer):
+        data = serializer.validated_data
+        guide = data.pop('guide')
+        obj_type = data.get('type')
+        related_object = data.get('related_object')
+
+        if obj_type == self.bind_object_serializer_class.GUIDE:
+            guide.establishments.remove(related_object)
+
+        elif obj_type == self.bind_object_serializer_class.PRODUCT:
+            guide.products.remove(related_object)
+
+
 class GuideFilterCreateView(GuideFilterBaseView,
                             generics.CreateAPIView):
     """View for GuideFilter model for BackOffice users."""
+
     def post(self, request, *args, **kwargs):
         super().create(request, *args, **kwargs)
         return Response(status=status.HTTP_200_OK)