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from __future__ import unicode_literals
from django.db import models
from django.utils.encoding import python_2_unicode_compatible
@python_2_unicode_compatible
class Poll(models.Model):
question = models.CharField(max_length=200)
def __str__(self):
return "Q: %s " % self.question
@python_2_unicode_compatible
class Choice(models.Model):
poll = models.ForeignKey(Poll, models.CASCADE)
choice = models.CharField(max_length=200)
def __str__(self):
return "Choice: %s in poll %s" % (self.choice, self.poll)
# A set of models with an inner one pointing to two outer ones.
class OuterA(models.Model):
pass
class OuterB(models.Model):
data = models.CharField(max_length=10)
class Inner(models.Model):
first = models.ForeignKey(OuterA, models.CASCADE)
# second would clash with the __second lookup.
third = models.ForeignKey(OuterB, models.SET_NULL, null=True)
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