Have you tried using unique_together? You could add unique_together = (
('type', 'producer',), ) to your Address model. There really isn't any way for
the default admin to edit a second table at the same time.
https://docs.djangoproject.com/en/1.4/ref/models/options/#unique-together
On Feb 14, 2013, at 8:42 AM, Ray Hatfield wrote:
> Thanks, but I've omitted related_name and I've used distinct related_names
> and gotten the same errors. I don't want to reuse addresses. The one-to-one
> relationship you describe is precisely what I'm trying to do.
>
> On Feb 14, 2013, at 1:32 AM, Jani Tiainen <[email protected]> wrote:
>
>> Hi,
>>
>> You're trying to setup one-to-one relationship.
>>
>> It means that producer.mailing_address does have exactly one unique Address
>> entity. Same goes for physical_address.
>>
>> What you want is really ForeignKey to address which means that you reuse
>> addresses to multiple producer.mailing_address.
>>
>> Then you can omit related names, or like someone suggested use different
>> related names for both fields.
>>
>> 13.2.2013 21:25, Ray Hatfield kirjoitti:
>>> Hi,
>>>
>>> I have a model which requires two addresses: a mailing address and a
>>> physical address. From an OO perspective it makes sense to have an
>>> Address class and the Producer to have Address instances as properties,
>>> but I can't seem to achieve this in django while still being able to
>>> edit the addresses inline as part of the Producer admin.
>>>
>>> I've tried this sort of thing:
>>>
>>> class Address( models.Model ):
>>> street = models.CharField( ... )
>>> # city state zip, etc.
>>>
>>> class Producer( models.Model ):
>>> mailing_address = models.OneToOneField( Address, related_name='+' )
>>> physical_address = models.OneToOneField( Address, related_name='+' )
>>>
>>> but when I attempt to inline the addresses in the django admin I run
>>> into trouble. I get errors like:
>>>
>>> <class 'producers.models.Address'> has no ForeignKey to <class
>>> 'producers.models.Producer'>
>>>
>>> (This error is true, of course. But I was under the apparently erroneous
>>> impression that including related_name='+' would prevent django from
>>> setting up the reverse relationship.)
>>>
>>> I realize I could add a foreign key to Address to associate it with a
>>> specific Producer but this feels backwards to me. An Address shouldn't
>>> need to know whether it's for a Producer or some other object. It's just
>>> an address.
>>>
>>> I've been banging my head on this for far too long. Advice?
>>>
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>>>
>>
>>
>> --
>> Jani Tiainen
>>
>> - Well planned is half done and a half done has been sufficient before...
>>
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>>
>
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>
Peter of the Norse
[email protected]
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