File uploads initially don't work correctly on the admin interface when using inlines

[jorisvddonk]

Uploading files inside a (stacked or tabular) inline form on the django admin interface doesn't work correctly: no file is actually uploaded. After selecting a file to upload and hitting save, an error is shown telling you that the file field is required. When this error is displayed and you retry the upload, uploading a file works correctly.

Checking with the Chrome devtools shows that nothing is actually getting uploaded when you select a file to upload, so this appears to be an issue with the form.

Tested with Django 1.6 with the default admin interface, django-admin-tools and django-suit. Verified that file uploads in regular forms (non-stacked) works correctly.

Configuration in which it doesn't work (from the django tutorial polls app): https://gist.github.com/jorisvddonk/9fad25e43f30856e29eb

[bradleyg]

Thanks. Fixed in 7a6c486.

[jorisvddonk]

Thanks for the quick fix!