default no folde roption to empty string
@@ -643,7 +643,7 @@ def add_resource_files(pk, *files, **kwargs):
assert(isinstance(source_names, list))
move = kwargs.pop('move', False)
- folder = kwargs.pop('folder', None)
+ folder = kwargs.pop('folder', '')
if __debug__: # assure that there are no spurious kwargs left.
for k in kwargs:
