django.db.models.fill_table_cache will dead loop if with circular Foreign Keys

[anonymous]

This function might fall into dead loop if there's a loop in the Foreign Key Relationships.

[anonymous]

I find this happens to me (without fail) using this very simple Model:

from django.db import models

class A(models.Model):
    B = models.ForeignKey('B')
    class Admin:
        list_display = ('B',)

class B(models.Model):
    A = models.ForeignKey('A')
    class Admin:
        pass

Clicking on "A" in the Admins Interface loops forever. Clicking on "B" works just fine. I don't know a lot about the internals but I get the feeling that the Admin interface is not the problem, but that "fill_table_cache" is. I would consider changing this to a "Blocker" as this is not that uncommon. If anyone knows where I can find more information on this, please attach it to this ticket.

[anonymous]

Ouch! My model was more like A->B, B->C, C->A. Same result.

[anonymous]

I've opened this 4 month ago, but it's still open!

So I decided I will solve it myself!! I'll use this weekend to make a patch. I've made one 4 month ago but I can't find it now.

[anonymous]

Hey Mr. Anon -

Waiting for that patch :)

[(none)]

Milestone Version 1.0 deleted

[Philippe Raoult]

#3288 is a specific case of this but has a patch fixing this issue for both SVN and 0.96. Adding regression tests too.