Creating Partial Indexes with Django 1.7

Question

The documentation for Django 1.7 mentions RunSQL classes can be used to create partial indexes on your tables. I have a table where I want the combination of

Answer 1

You could just provide an unique_together like so:

class Post(models.Model):
    title = models.CharField(max_length=200)
    blog = models.ForeignKey(Blog)
    category = models.ForeignKey(Category, null=True, blank=True)

class Meta:
    unique_together = ("title", "blog", "category")

NULLs for category will work how you want in that if not set then title/blog has to be unique.

https://docs.djangoproject.com/en/1.8/ref/models/options/#unique-together