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
12009	Allow name of file in FileField/ImageField to be based on primary key	krzyk	nobody	"Currently there is no way to prevent admin from uploading file with the same name (which will result in overwriting the previous file) (having zillions of date based directiories is not a good idea).
The simplest solution would be to use primary key as the file name, but when upload_to callable is called the instance doesn't have the primary key yet.

{{{

class Gallery(models.Model):
    name = models.CharField(max_length=255)

def image_upload(instance, filename):
        return 'content/gallery/' + gallery.id + '/' + instance.id + '.jpg' # extension can be retrieved from filename

class Image(models.Model):
    gallery = models.ForeignKey(Gallery)
    title = models.CharField(max_length=255)
    image = models.ImageField(upload_to=image_upload)

}}}

The above results in creation of None.jpg file.
"		closed	File uploads/storage	1.1		wontfix			Unreviewed	0	0	0	0	0	0