Better handling of errors in backend.

Author: sigurdga

fileupload/views.py

@@ -1,4 +1,7 @@
 # encoding: utf-8
+import json
+
+from django.http import HttpResponse
 from django.views.generic import CreateView, DeleteView, ListView
 from .models import Picture
 from .response import JSONResponse, response_mimetype
@@ -16,6 +19,9 @@ def form_valid(self, form):
         response['Content-Disposition'] = 'inline; filename=files.json'
         return response
 
+    def form_invalid(self, form):
+        data = json.dumps(form.errors)
+        return HttpResponse(content=data, status=400, content_type='application/json')
 
 class BasicVersionCreateView(PictureCreateView):
     template_name_suffix = '_basic_form'