wizard,
Would it make sense to use the intermediate table to hold the field?
Using the stack overflow example:
class Edi856(models.Model):
pass
class Order(models.Model):
edi = models.ManyToManyField(Edi856, through='PoNum')
def in_edi(self):
'''Has the edi been processed?'''
return self.edi.all().count()
class PoNum(models.Model):
order = models.ForeignKey(Order)
edi = models.ForeignKey(Edi856)
po_num = models.CharField(max_length=90, db_index=True )
The save route also sounds ok, a pre_save signal could also work.
On Wed, Apr 14, 2010 at 5:19 AM, wizard <wiz...@roborooter.com> wrote:
> This is sort of an extension of my post from stackoverflow.
>
> http://stackoverflow.com/questions/2632573/how-do-i-relate-two-models-tables-in-django-based-on-non-primary-non-unique-keys
>
> The gist is I have two tables with a common field and I would like to
> relate two models with a many to many based off of this field.
>
> As far as I can tell I have to build the relations manually. I was
> thinking of overriding the save method in both models to query the
> other table and rebuild the relation on save.
>
> Does this sound rational?
>
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