From b62f500b2e8d7e79ed62443ae3c7949a1969b8a7 Mon Sep 17 00:00:00 2001
From: Francesco Siddi <francesco.siddi@gmail.com>
Date: Thu, 4 Apr 2019 13:09:53 +0200
Subject: [PATCH] Cast empty string value in form_field to None

For FilmProjectForm, when no value is specified we want to save it
as None in the project document.
---
 cloud/routes.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/cloud/routes.py b/cloud/routes.py
index 5818721..2516f45 100644
--- a/cloud/routes.py
+++ b/cloud/routes.py
@@ -608,6 +608,9 @@ def save_film_settings(project: pillarsdk.Project):
         form_field = getattr(form, field_name)
         # TODO(fsiddi) if form_field type is FileSelectField, convert it to ObjectId
         # Currently this raises TypeError: Object of type 'ObjectId' is not JSON serializable
+
+        if form_field.data == '':
+            form_field.data = None
         updated_extension_props[field_name] = form_field.data
 
     # Update extension props and save project