You could create a model that references the join table itself.
class ArticlePublicationsJoin(models.Model):
id = models.AutoField()
publicaiton_id = models.IntegerField()
article_id = models.IntegerField()
class Meta:
db_table = 'article_publications'
then just query on that...
query = ArticlePublicationsJoin.objects.get(publication_id='pub_id',
article_id='art_id')
primary_key = query.pk
On Apr 22, 7:13 pm, Info Cascade <informationcasc...@gmail.com> wrote:
> Hi --
>
> I have two models with a m2m relationship, and I need to get the value
> of the primary key of the join table.
>
> To use the example from the book:
>
>
>
>
>
> > from django.db import models
>
> > class Publication(models.Model):
> > title = models.CharField(max_length=30)
>
> > def __unicode__(self):
> > return self.title
>
> > class Meta:
> > ordering = ('title',)
>
> > class Article(models.Model):
> > headline = models.CharField(max_length=100)
> > publications = models.ManyToManyField(Publication)
>
> > def __unicode__(self):
> > return self.headline
>
> > class Meta:
> > ordering = ('headline',)
>
> Django creates the article_publications join table automatically.
>
> What I need is, for a particular combination of article and publication,
> what is the primary key in the join table?
>
> Any thoughts?
>
> Please Cc: me at liamk -- AT -- numenet --DOT--com if you can help!
>
> Thanks,
> Liam
>
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