Re: How to use an optional ForeignKey to sites.Site and admin's "View on site"?

Indeed, I'm using optional (and nullable) ForeignKeys in other places as well.

The problem with an optional ForeignKey to Django's contrib sites.Site model, is that it breaks the "View on site" button in the admin section.

near line 60 in /django/contrib/contenttypes/views.py:

   object_domain = getattr(obj, field.name).domain

So, is this a bug? Or did I miss something?

Dirk

On 30 mei 2012, at 15:24, Derek wrote:

Actually, you can have a nullable ForeignKey (and there can be good
reasons for this).  This is mentioned in the docs themselves; see:
https://docs.djangoproject.com/en/dev/ref/models/fields/#django.db.models.ForeignKey.on_delete

I am not sure about the error that the OP is encountering.


On May 29, 7:47 pm, Thomas Lockhart <tlockhart1...@gmail.com> wrote:

...> Hi,

I have a model which has a ForeignKey to the Django contrib sites.Site model. This field should be optional.

If it is optional it is not a foreign key. You can put a constraint on

the field to have a non-null value be present in the other table, and

perhaps there is a way to do this from a django model but I haven't

looked at that.

hth

                            - Tom

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