Question

I can’t get Django (1.5) to create MySQL UNIQUE indexes on 3 columns, even though I’ve followed every suggestion I found on SO. Here’s how my model looks like:

class Loc(models.Model):
    rand = models.IntegerField()
    sectiune = models.ForeignKey(Sectiune)
    numar = models.IntegerField()
    pret = models.FloatField()

    def __unicode__(self):
        return str(self.sectiune.nume) + ': R' + str(self.rand) + ' L' +     str(self.numar)

    class Meta:
        unique_together = (("rand","sectiune","numar"),)

I really don’t get what’s wrong. I’ve seen a bug report that unique_together doesn’t work on foreign keys, but I’ve also seen that has been fixed. Any help?

Answer 1

Turns out Django is not that smart after all… It doesn’t know how to ALTER a table to create the UNIQUE constraint. I just had to delete the tables, run syncdb again, and the constraints were there 🙂