fix edit user bug

apps/herd/web/api/v1/serializers.py

@@ -18,11 +18,12 @@ class HerdSerializer(serializers.ModelSerializer):
         """ Customize serializer output """
         representation = super().to_representation(instance)
         if isinstance(instance, Herd):
-            representation['owner'] = UserSerializer(instance.owner).data
+            representation['owner'] = instance.owner.id
             representation['cooperative'] = OrganizationSerializer(instance.cooperative).data
             representation['province'] = ProvinceSerializer(instance.province).data
             representation['city'] = CitySerializer(instance.city).data
             representation['contractor'] = OrganizationSerializer(instance.contractor).data
+            representation['rancher'] = RancherSerializer(instance.rancher).data
 
         return representation
 
@@ -33,6 +34,8 @@ class RancherSerializer(serializers.ModelSerializer):
         fields = '__all__'
 
     def to_representation(self, instance):
+        """ customize output of serializer """
+
         representation = super().to_representation(instance)
 
         representation['province'] = {