django Model example

gistfile1.py

class Category(models.Model):
    """Category for posts"""
    name         = models.CharField(max_length=50)
    has_children = models.BooleanField(default=0)
    is_sub       = models.BooleanField(default=0)
    parent       = models.CharField(max_length=50, null=True, blank=True)
    position     = models.IntegerField()
    visible      = models.BooleanField(default=1)