Introduced WritableSerializerMixin

netbox/utilities/api.py

@@ -1,6 +1,30 @@
 from rest_framework.exceptions import APIException
+from rest_framework.serializers import ModelSerializer
+
+
+WRITE_OPERATIONS = ['create', 'update', 'partial_update', 'delete']
 
 
 class ServiceUnavailable(APIException):
     status_code = 503
     default_detail = "Service temporarily unavailable, please try again later."
+
+
+class WritableSerializerMixin(object):
+    """
+    Returns a flat Serializer from the given model suitable for write operations (POST, PUT, PATCH). This is necessary
+    to allow write operations on objects which utilize nested serializers.
+    """
+
+    def get_serializer_class(self):
+
+        class WritableSerializer(ModelSerializer):
+
+            class Meta:
+                model = self.queryset.model
+                fields = '__all__'
+
+        if self.action in WRITE_OPERATIONS:
+            return WritableSerializer
+
+        return self.serializer_class