Unique model field in Django and case sensitivity (postgres)

Question

Consider the following situation: -

Suppose my app allows users to create the states / provinces in their country. Just for clarity, we are considering only ASCII ch

Answer 1

You can do this by overwriting the Model's save method - see the docs. You'd basically do something like:

class State(models.Model):
    name = models.CharField(max_length=50, unique=True)

    def save(self, force_insert=False, force_update=False):
        if State.objects.get(name__iexact = self.name):
            return
        else:
            super(State, self).save(force_insert, force_update)

Also, I may be wrong about this, but the upcoming model-validation SoC branch will allow us to do this more easily.