Generate Django “unique_together” key with “id” field

Question

Here is the model

class MyModel(models.Model):
    id = models.CharField(max_length=10, primary_key=True)
    password = models.CharField(max_length=25)
    area = models.CharField(max_length=100, primary_key=True)

    def __unicode__(self):
        return "%s from %s" % (self.id, self.area)

    class Meta:
        unique_together = (("id", "area"),)

I am trying to generate a unique key using Django's built-in Id functionality without making Id as a primary key.

Possible?

Answer 1

I do not think you can have a primary key based on multiple column (cf. django doc : https://code.djangoproject.com/wiki/MultipleColumnPrimaryKeys ).

Only unique_together will still work.

In case what you want is an auto incremented field which is not a primary key :

AutoField¶

class AutoField(**options)¶ An IntegerField that automatically increments according to available IDs. You usually won't need to use this directly; a primary key field will automatically be added to your model if you don't specify otherwise. See Automatic primary key fields.