Specifying "through" instead of "db_table" did not raise any errors,
but it caused the relevant field in the admin change form to
disappear!
On Apr 3, 4:52 pm, Karen Tracey <kmtra...@gmail.com> wrote:
> On Fri, Apr 3, 2009 at 4:25 PM, Andrew G. <agross...@gmail.com> wrote:
>
> > The following code in a fresh project/app will cause the database
> > creation to fail.
>
> > class Position(models.Model):
> > description = models.CharField(max_length=20, blank=True,
> > null=True)
> > parts = models.ManyToManyField('Part', db_table='part_positions')
>
> > class PartPosition(models.Model):
> > rule_id = models.IntegerField(primary_key=True, editable=False)
> > part = models.ForeignKey('Part')
> > position = models.ForeignKey('Position')
>
> > class Meta:
> > db_table = 'part_positions'
>
> > class Part(models.Model):
> > description = models.CharField(max_length=20, blank=True,
> > null=True)
> > positions = models.ManyToManyField('Position',
> > db_table='part_positions')
>
> I think you want to be specifying "through" the PartPosition model, not
> directly specifying the db_table for that model, on your ManyToMany fields:
>
> http://docs.djangoproject.com/en/dev/topics/db/models/#extra-fields-o...
>
> When you specify "db_table" the database creation code still thinks it needs
> to create the model, when you specify "through" another model it knows the
> table will be created when that model is processed.
>
> Karen
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