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
9418	upload_to doesn't work like excepted	Bernd Schlapsi	nobody	"Hello,

I am using the latest svn-revision 9244 and tried to use a callable in the upload_to parameter of my !ImageField.

The explanation in the django-docs for the instance-parameter of acallable says the following:
{{{
An instance of the model where the FileField is defined. More specifically, this is the particular instance where the current file is being attached.
}}}

If I understand this right, I have access to all the input data of this instance (excepting the id). If I have the following models.py
{{{
01: from django.db import models
02:
03: def get_storage_path(instance, filename):
04:    import os.path
05:    print ""instance: %s"" % (instance)
06:    print ""desc: %s"" % (instance.desc)
07:    return os.path.join('uploads', filename)
08:
09: class ImageModel(models.Model):
10:    image = models.ImageField('image', upload_to=get_storage_path)
11:    desc = models.CharField(max_length=100)
12:
13:    def __unicode__(self):
14:        return u'%s - %s' % (self.image, self.desc)
}}}
the print statement in line 6 should print all the data I inserted into this variable in the admin. Is that right? In my case this is always a empty string:
{{{
[20/Oct/2008 21:52:47] ""GET /admin/hp/imagemodel/add/ HTTP/1.1"" 2002822
[20/Oct/2008 21:52:47] ""GET /admin/jsi18n/ HTTP/1.1"" 200 1915
instance:  -
desc:
[20/Oct/2008 21:52:54] ""POST /admin/hp/imagemodel/add/ HTTP/1.1"" 302 0
[20/Oct/2008 21:52:54] ""GET /admin/hp/imagemodel/ HTTP/1.1"" 200 1866
}}}

But this is only true if I change the order of the two fields in my model. It seems that the order in the model is important for this behavior. But in my production case I subclass a model of an reusable app (photologue) and so I have no impact for the right order of my fields!
I tend to think it's a bug and file-type fields should be saved after non-file fields. "		closed	File uploads/storage	1.0		fixed			Accepted	1	0	0	0	0	0