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
1759	ManyToMany DoesNotExist exception when saving in the admin interface	sandro	Adrian Holovaty	"I have these models:

{{{
class Attachment(models.Model):
  file = models.FileField(upload_to=""attachments"",null=True)
  ...

class Announcement(models.Model):
  ...
  attachments = models.ManyToManyField(Attachment,blank=True)
  ...
}}}


When I Add a new announcement in the django admin and hit 'Save' I am
brought to an error page that says:
{{{
DoesNotExist at /admin/student_update/announcement/add/
Attachment does not exist for {'pk': None}

  Request Method:  POST
  Request URL:  http://djanghost.mine.nu:8001/admin/student_update/announcement/add/
  Exception Type:  DoesNotExist
  Exception Value:  Attachment does not exist for {'pk': None}
  Exception Location:  /home/santuri/magic-removal/django/db/models/query.py in get, line 191 

}}}

The announcement does save, I just get this nasty error message as my POST response.
"	defect	closed	contrib.admin	dev	normal	worksforme			Unreviewed	0	0	0	0	0	0