Re: migration via south for inheritance change -> please help

You'll have to migrate your data manually in your migration, yes.

Besides that, if you don't want actual Base instances, then this is an abstract class, and you should do this:

class Base(models.Model):
    eggs....
    plants....
    class Meta:
        abstract=True

class Foo(Base):
    carpet=....

class Bar(Base):
    car=....

On Wed, Jul 4, 2012 at 5:18 PM, Lachlan Musicman <datakid@gmail.com> wrote:
> I'd like to know this too - but I think the real answer is "get better
> at python" - you are essentially (from what I can tell) in a django
> shell when south pops the "not blank, not null but no data" error -
> try pulling in some details from fixtures?
>
> cheers
> L.
>
> On Thu, Jul 5, 2012 at 2:30 AM, Daniel Walz <mcjack@gmail.com> wrote:
>> ...no one?
>>
>> regards, mcJack
>>
>> 2012/7/2 mcJack <mcjack@gmail.com>:
>>> Hi all,
>>>
>>> I've got a problem migrating some changes in the model, so I tried to solve
>>> it with south.
>>> The situation:
>>> I implemented two classes, which share some functionality. Now that I
>>> improved a little with python, django and co. I wanted to use inheritance
>>> for that issue.
>>> The model looks like this:
>>>
>>> class Foo(models.Model):
>>>     eggs = models.TextField( null=True, blank=True )
>>>     plants = models.TextField( null=True, blank=True )
>>>     carpet = models.IntegerField()
>>>
>>> class Bar(models.Model):
>>>     eggs = models.TextField( null=True, blank=True )
>>>     plants = models.TextField( null=True, blank=True )
>>>     car = models.IntegerField()
>>>
>>>
>>> And obviously I want to transform to:
>>> class Base(models.Model):
>>>     eggs = models.TextField( null=True, blank=True )
>>>     plants = models.TextField( null=True, blank=True )
>>>
>>> class Foo(models.Model):
>>>     base = models.OneToOneField( 'Base', parent_link=True )
>>>     carpet = models.IntegerField()
>>>
>>> class Bar(models.Model):
>>>     base = models.OneToOneField( 'Base', parent_link=True )
>>>     car = models.IntegerField()
>>>
>>> But how can I tell south to fill the super class with the data from the old
>>> schema?
>>>
>>> Can I add this information manually in the created migration script? or is
>>> there an option/switch I didn't notice?
>>>
>>> Any hints are very welcome, thanks a lot
>>>
>>> mcJack
>>>
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>>
>>
>>
>> --
>> Daniel Walz - mcJack@gmail.com
>> Bremen, Germany
>>
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>
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