"""

Regression tests for a few ForeignKey bugs.

"""

from django.db import models

# If ticket #1578 ever slips back in, these models will not be able to be

# created (the field names being lower-cased versions of their opposite

# classes is important here).

class First(models.Model):

    second = models.IntegerField()

class Second(models.Model):

    first = models.ForeignKey(First, related_name = 'the_first')

# Protect against repetition of #1839, #2415 and #2536.

class Third(models.Model):

    name = models.CharField(max_length=20)

    third = models.ForeignKey('self', null=True, related_name='child_set')

class Parent(models.Model):

    name = models.CharField(max_length=20)

    bestchild = models.ForeignKey('Child', null=True, related_name='favored_by')

class Child(models.Model):

    name = models.CharField(max_length=20)

    parent = models.ForeignKey(Parent)

# Multiple paths to the same model (#7110, #7125)

class Category(models.Model):

    name = models.CharField(max_length=20)

    def __unicode__(self):

        return self.name

class Record(models.Model):

    category = models.ForeignKey(Category)

class Relation(models.Model):

    left = models.ForeignKey(Record, related_name='left_set')

    right = models.ForeignKey(Record, related_name='right_set')

    def __unicode__(self):

        return u"%s - %s" % (self.left.category.name, self.right.category.name)