id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
7667	7814 breaks FileField.save_file for related objects	oggy	Michael Axiak	"{{{
class Article(models.Model):
    body = models.CharField(max_length=200)
    class Admin:
        pass

class Attachment(models.Model):
    article = models.ForeignKey(Article, num_in_admin=1, num_extra_on_change=1, edit_inline=models.TABULAR)
    file = models.FileField(upload_to='uploads/attachments/%Y/%m/%d')
    keep = models.BooleanField(core=True, default=True, editable=False)
    remove = models.BooleanField(default=False)
    name = models.CharField(max_length=30)
}}}

Django admin breaks when attempting to create a new Article w/o any attachments. The problem is that after the introduction of MultiPartParser in 7814, request.POST contains an entry 
{{{ u'attachment.0.file_file': [u''] }}}
whereas that entry would be missing in prior revisions. This eventually leads to an entry of:
{{{ u'file_file': [u''] }}}
instead of 
{{{ u'file_file': [] }}}
in the new_data dict which is passed as the parameter to FileField.save_file, so this method eventually breaks. The fix is simple and I'm attaching a patch for it. The only thing is that I'm not sure if it would perhaps be better to handle this somewhere else?"		closed	Database layer (models, ORM)	dev		fixed	file upload FileField related, 2070-fix fs-rf	ognjen.maric@…	Accepted	1	0	0	0	0	0