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(maxlength=20)

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

class Parent(models.Model):

    name = models.CharField(maxlength=20)

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

class Child(models.Model):

    name = models.CharField(maxlength=20)

    parent = models.ForeignKey(Parent)

__test__ = {'API_TESTS':"""

>>> Third.AddManipulator().save(dict(id='3', name='An example', another=None)) 

<Third: Third object>

>>> parent = Parent(name = 'fred')

>>> parent.save()

>>> Child.AddManipulator().save(dict(name='bam-bam', parent=parent.id))

<Child: Child object>

"""}