if you want to use openid for your django application, there are plenty of libraries out there. i've chosen to use django-openid-auth library for this. however when you try to sync database you receive the following error;

      _mysql_exceptions.OperationalError: (1170, "BLOB/TEXT column 'claimed_id' used in key specification without a key length")
    

to be honest i've never liked django's orm, when you want your textfield as unique you receive this problem.

      myText = models.TextField(max_length=1024, unique=True) # error!
    

the only way to solve this problem is to leave off the unique=True and alter table to create the index, and re-add the unique=True.
django-openid-auth suffers this problem as well. as you can easily guess, the solution is the above line. go into django_openid_auth folder and open models.py and change the following line;

      class UserOpenID(models.Model):
          user = models.ForeignKey(User)
          claimed_id = models.TextField(max_length=2047, unique=True) # here's the problem
          display_id = models.TextField(max_length=2047)
    

change the claim_id as follows;

      claimed_id = models.TextField(max_length=2047)