Draft API endpoint RUD class

- RUD = Retrieve / Update / Destroy
- When issuing an Update command, the validity is checked but the model object is only saved if the POST data has "_is_final": true

InvenTree/InvenTree/serializers.py

@@ -0,0 +1,17 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from rest_framework import serializers
+from rest_framework import generics
+from rest_framework import mixins
+
+class DraftRUDView(generics.RetrieveAPIView, generics.UpdateAPIView, generics.DestroyAPIView):
+
+    def perform_update(self, serializer):
+
+        ctx_data = serializer._context['request'].data
+
+        if ctx_data.get('_is_final', False) in [True, u'true', u'True', 1]:
+            super(generics.UpdateAPIView, self).perform_update(serializer)
+        else:
+            pass

InvenTree/InvenTree/settings.py

@@ -92,7 +92,8 @@ TEMPLATES = [
 ]
 
 REST_FRAMEWORK = {
-    'EXCEPTION_HANDLER': 'InvenTree.utils.api_exception_handler',
+    'EXCEPTION_HANDLER': 'rest_framework.views.exception_handler'
+    # 'EXCEPTION_HANDLER': 'InvenTree.utils.api_exception_handler',
     # 'DEFAULT_PAGINATION_CLASS': 'rest_framework.pagination.PageNumberPagination',
     # 'PAGE_SIZE': 50,
 }