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
2522	Error when 2 foreign keys to same Model w/ edit_inline=True	mgraziosi@…	anonymous	"It seems that Django has some serious restrictions/bug when there are two foreign keys pointing to the same Model and one of them has the `edit_inline` attribute set.

Suppose the following problem: a need to represent the concept of a callgroup: a list of items (either persons or, again, callgroups) to which phone calls should be dispatched in a given sequence. The model is illustrated at the end of this ticket.

When I try to use the Admin interface it seems to get
confused:

  * If I set editable=False in callgroup_owner the Admin interface gets confused because there are two foreign keys from !CallgroupItem to Callgroup: `callgroup_owner` and `callgroup_member`. In fact the Admin interface shows a TABULAR list of Callgroup items and, also, a STACKED list (however, only one should be shown).

  * If I set editable=True in `callgroup_owner` when I try to Add a new callgroup I get !KeyError exception with the following offending template line:
{{{
{% for related_object in inline_related_objects %} ...
}}}

I'm using version 0.96-pre of Django. Following is the data model I used (`models.py`) to isolate and reproduce the bug:
{{{
class Person (models.Model):
    name = models.CharField(maxlength=15)

class Callgroup (models.Model):
    name = models.CharField(maxlength=15)
    class Admin:
        pass

class CallgroupItem (models.Model):
    sequence = models.IntegerField(core=True)

    # Owner of this callgroup item
    callgroup_owner = models.ForeignKey(Callgroup,
            related_name=""callgroup_owner"",
            editable=False, # Error even if True
            edit_inline=models.TABULAR,
            )

    # Callgroup to be called (if not NULL)
    callgroup_member = models.ForeignKey(Callgroup,
            related_name=""callgroup_member"",
            null=True, blank=True,
            )
    # Person to be called (if not NULL)
    person_member = models.ForeignKey(Person,
            related_name=""person_member"",
            null=True, blank=True
            )
}}}

"	defect	closed	contrib.admin	0.95	blocker	duplicate	graph, graphs, FormWrapper	Maniac@…	Unreviewed	0	0	0	0	0	0