mirror of https://github.com/django/django.git
92 lines
2.6 KiB
Python
92 lines
2.6 KiB
Python
from django.db import models
|
|
|
|
class Place(models.Model):
|
|
name = models.CharField(max_length=50)
|
|
address = models.CharField(max_length=80)
|
|
|
|
def __unicode__(self):
|
|
return u"%s the place" % self.name
|
|
|
|
class Restaurant(models.Model):
|
|
place = models.OneToOneField(Place)
|
|
serves_hot_dogs = models.BooleanField()
|
|
serves_pizza = models.BooleanField()
|
|
|
|
def __unicode__(self):
|
|
return u"%s the restaurant" % self.place.name
|
|
|
|
class Bar(models.Model):
|
|
place = models.OneToOneField(Place)
|
|
serves_cocktails = models.BooleanField()
|
|
|
|
def __unicode__(self):
|
|
return u"%s the bar" % self.place.name
|
|
|
|
class Favorites(models.Model):
|
|
name = models.CharField(max_length = 50)
|
|
restaurants = models.ManyToManyField(Restaurant)
|
|
|
|
def __unicode__(self):
|
|
return u"Favorites for %s" % self.name
|
|
|
|
__test__ = {'API_TESTS':"""
|
|
# Regression test for #1064 and #1506: Check that we create models via the m2m
|
|
# relation if the remote model has a OneToOneField.
|
|
>>> p1 = Place(name='Demon Dogs', address='944 W. Fullerton')
|
|
>>> p1.save()
|
|
>>> r = Restaurant(place=p1, serves_hot_dogs=True, serves_pizza=False)
|
|
>>> r.save()
|
|
>>> f = Favorites(name = 'Fred')
|
|
>>> f.save()
|
|
>>> f.restaurants = [r]
|
|
>>> f.restaurants.all()
|
|
[<Restaurant: Demon Dogs the restaurant>]
|
|
|
|
# Regression test for #7173: Check that the name of the cache for the
|
|
# reverse object is correct.
|
|
>>> b = Bar(place=p1, serves_cocktails=False)
|
|
>>> b.save()
|
|
>>> p1.restaurant
|
|
<Restaurant: Demon Dogs the restaurant>
|
|
>>> p1.bar
|
|
<Bar: Demon Dogs the bar>
|
|
|
|
#
|
|
# Regression test for #6886 (the related-object cache)
|
|
#
|
|
|
|
# Look up the objects again so that we get "fresh" objects
|
|
>>> p = Place.objects.get(name="Demon Dogs")
|
|
>>> r = p.restaurant
|
|
|
|
# Accessing the related object again returns the exactly same object
|
|
>>> p.restaurant is r
|
|
True
|
|
|
|
# But if we kill the cache, we get a new object
|
|
>>> del p._restaurant_cache
|
|
>>> p.restaurant is r
|
|
False
|
|
|
|
# Reassigning the Restaurant object results in an immediate cache update
|
|
# We can't use a new Restaurant because that'll violate one-to-one, but
|
|
# with a new *instance* the is test below will fail if #6886 regresses.
|
|
>>> r2 = Restaurant.objects.get(pk=r.pk)
|
|
>>> p.restaurant = r2
|
|
>>> p.restaurant is r2
|
|
True
|
|
|
|
# Assigning None fails: Place.restaurant is null=False
|
|
>>> p.restaurant = None
|
|
Traceback (most recent call last):
|
|
...
|
|
ValueError: Cannot assign None: "Place.restaurant" does not allow null values.
|
|
|
|
# You also can't assign an object of the wrong type here
|
|
>>> p.restaurant = p
|
|
Traceback (most recent call last):
|
|
...
|
|
ValueError: Cannot assign "<Place: Demon Dogs the place>": "Place.restaurant" must be a "Restaurant" instance.
|
|
|
|
"""}
|