mirror of
https://github.com/django/django.git
synced 2024-11-29 22:56:46 +01:00
108 lines
3.5 KiB
Python
108 lines
3.5 KiB
Python
from __future__ import absolute_import
|
|
|
|
from django.http import Http404
|
|
from django.shortcuts import get_object_or_404, get_list_or_404
|
|
from django.test import TestCase
|
|
|
|
from .models import Author, Article
|
|
|
|
|
|
class GetObjectOr404Tests(TestCase):
|
|
def test_get_object_or_404(self):
|
|
a1 = Author.objects.create(name="Brave Sir Robin")
|
|
a2 = Author.objects.create(name="Patsy")
|
|
|
|
# No Articles yet, so we should get a Http404 error.
|
|
self.assertRaises(Http404, get_object_or_404, Article, title="Foo")
|
|
|
|
article = Article.objects.create(title="Run away!")
|
|
article.authors = [a1, a2]
|
|
# get_object_or_404 can be passed a Model to query.
|
|
self.assertEqual(
|
|
get_object_or_404(Article, title__contains="Run"),
|
|
article
|
|
)
|
|
|
|
# We can also use the Article manager through an Author object.
|
|
self.assertEqual(
|
|
get_object_or_404(a1.article_set, title__contains="Run"),
|
|
article
|
|
)
|
|
|
|
# No articles containing "Camelot". This should raise a Http404 error.
|
|
self.assertRaises(Http404,
|
|
get_object_or_404, a1.article_set, title__contains="Camelot"
|
|
)
|
|
|
|
# Custom managers can be used too.
|
|
self.assertEqual(
|
|
get_object_or_404(Article.by_a_sir, title="Run away!"),
|
|
article
|
|
)
|
|
|
|
# QuerySets can be used too.
|
|
self.assertEqual(
|
|
get_object_or_404(Article.objects.all(), title__contains="Run"),
|
|
article
|
|
)
|
|
|
|
# Just as when using a get() lookup, you will get an error if more than
|
|
# one object is returned.
|
|
|
|
self.assertRaises(Author.MultipleObjectsReturned,
|
|
get_object_or_404, Author.objects.all()
|
|
)
|
|
|
|
# Using an empty QuerySet raises a Http404 error.
|
|
self.assertRaises(Http404,
|
|
get_object_or_404, Article.objects.none(), title__contains="Run"
|
|
)
|
|
|
|
# get_list_or_404 can be used to get lists of objects
|
|
self.assertEqual(
|
|
get_list_or_404(a1.article_set, title__icontains="Run"),
|
|
[article]
|
|
)
|
|
|
|
# Http404 is returned if the list is empty.
|
|
self.assertRaises(Http404,
|
|
get_list_or_404, a1.article_set, title__icontains="Shrubbery"
|
|
)
|
|
|
|
# Custom managers can be used too.
|
|
self.assertEqual(
|
|
get_list_or_404(Article.by_a_sir, title__icontains="Run"),
|
|
[article]
|
|
)
|
|
|
|
# QuerySets can be used too.
|
|
self.assertEqual(
|
|
get_list_or_404(Article.objects.all(), title__icontains="Run"),
|
|
[article]
|
|
)
|
|
|
|
def test_bad_class(self):
|
|
# Given an argument klass that is not a Model, Manager, or Queryset
|
|
# raises a helpful ValueError message
|
|
self.assertRaisesMessage(ValueError,
|
|
"Object is of type 'str', but must be a Django Model, Manager, "
|
|
"or QuerySet",
|
|
get_object_or_404, "Article", title__icontains="Run"
|
|
)
|
|
|
|
class CustomClass(object):
|
|
pass
|
|
|
|
self.assertRaisesMessage(ValueError,
|
|
"Object is of type 'CustomClass', but must be a Django Model, "
|
|
"Manager, or QuerySet",
|
|
get_object_or_404, CustomClass, title__icontains="Run"
|
|
)
|
|
|
|
# Works for lists too
|
|
self.assertRaisesMessage(ValueError,
|
|
"Object is of type 'list', but must be a Django Model, Manager, "
|
|
"or QuerySet",
|
|
get_list_or_404, [Article], title__icontains="Run"
|
|
)
|