from django.db import models from django.db import connection class Square(models.Model): root = models.IntegerField() square = models.PositiveIntegerField() def __unicode__(self): return "%s ** 2 == %s" % (self.root, self.square) class Person(models.Model): first_name = models.CharField(max_length=20) last_name = models.CharField(max_length=20) def __unicode__(self): return u'%s %s' % (self.first_name, self.last_name) class SchoolClass(models.Model): year = models.PositiveIntegerField() day = models.CharField(max_length=9, blank=True) last_updated = models.DateTimeField()