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thirdparty/google_appengine/lib/django/tests/modeltests/many_to_many/models.py
changeset 2866 a04b1e4126c4
parent 2864 2e0b0af889be
child 2868 9f7f269383f7 
--- a/thirdparty/google_appengine/lib/django/tests/modeltests/many_to_many/models.py	Sun Sep 06 23:31:53 2009 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,258 +0,0 @@
-"""
-5. Many-to-many relationships
-
-To define a many-to-many relationship, use ManyToManyField().
-
-In this example, an article can be published in multiple publications,
-and a publication has multiple articles.
-"""
-
-from django.db import models
-
-class Publication(models.Model):
-    title = models.CharField(maxlength=30)
-
-    def __str__(self):
-        return self.title
-
-    class Meta:
-        ordering = ('title',)
-
-class Article(models.Model):
-    headline = models.CharField(maxlength=100)
-    publications = models.ManyToManyField(Publication)
-
-    def __str__(self):
-        return self.headline
-
-    class Meta:
-        ordering = ('headline',)
-
-__test__ = {'API_TESTS':"""
-# Create a couple of Publications.
->>> p1 = Publication(id=None, title='The Python Journal')
->>> p1.save()
->>> p2 = Publication(id=None, title='Science News')
->>> p2.save()
->>> p3 = Publication(id=None, title='Science Weekly')
->>> p3.save()
-
-# Create an Article.
->>> a1 = Article(id=None, headline='Django lets you build Web apps easily')
->>> a1.save()
-
-# Associate the Article with a Publication.
->>> a1.publications.add(p1)
-
-# Create another Article, and set it to appear in both Publications.
->>> a2 = Article(id=None, headline='NASA uses Python')
->>> a2.save()
->>> a2.publications.add(p1, p2)
->>> a2.publications.add(p3)
-
-# Adding a second time is OK
->>> a2.publications.add(p3)
-
-# Add a Publication directly via publications.add by using keyword arguments.
->>> new_publication = a2.publications.create(title='Highlights for Children')
-
-# Article objects have access to their related Publication objects.
->>> a1.publications.all()
-[<Publication: The Python Journal>]
->>> a2.publications.all()
-[<Publication: Highlights for Children>, <Publication: Science News>, <Publication: Science Weekly>, <Publication: The Python Journal>]
-
-# Publication objects have access to their related Article objects.
->>> p2.article_set.all()
-[<Article: NASA uses Python>]
->>> p1.article_set.all()
-[<Article: Django lets you build Web apps easily>, <Article: NASA uses Python>]
->>> Publication.objects.get(id=4).article_set.all()
-[<Article: NASA uses Python>]
-
-# We can perform kwarg queries across m2m relationships
->>> Article.objects.filter(publications__id__exact=1)
-[<Article: Django lets you build Web apps easily>, <Article: NASA uses Python>]
->>> Article.objects.filter(publications__pk=1)
-[<Article: Django lets you build Web apps easily>, <Article: NASA uses Python>]
->>> Article.objects.filter(publications=1)
-[<Article: Django lets you build Web apps easily>, <Article: NASA uses Python>]
->>> Article.objects.filter(publications=p1)
-[<Article: Django lets you build Web apps easily>, <Article: NASA uses Python>]
-
->>> Article.objects.filter(publications__title__startswith="Science")
-[<Article: NASA uses Python>, <Article: NASA uses Python>]
-
->>> Article.objects.filter(publications__title__startswith="Science").distinct()
-[<Article: NASA uses Python>]
-
-# The count() function respects distinct() as well.
->>> Article.objects.filter(publications__title__startswith="Science").count()
-2
-
->>> Article.objects.filter(publications__title__startswith="Science").distinct().count()
-1
-
->>> Article.objects.filter(publications__in=[1,2]).distinct()
-[<Article: Django lets you build Web apps easily>, <Article: NASA uses Python>]
->>> Article.objects.filter(publications__in=[1,p2]).distinct()
-[<Article: Django lets you build Web apps easily>, <Article: NASA uses Python>]
->>> Article.objects.filter(publications__in=[p1,p2]).distinct()
-[<Article: Django lets you build Web apps easily>, <Article: NASA uses Python>]
-
-# Reverse m2m queries are supported (i.e., starting at the table that doesn't
-# have a ManyToManyField).
->>> Publication.objects.filter(id__exact=1)
-[<Publication: The Python Journal>]
->>> Publication.objects.filter(pk=1)
-[<Publication: The Python Journal>]
-
->>> Publication.objects.filter(article__headline__startswith="NASA")
-[<Publication: Highlights for Children>, <Publication: Science News>, <Publication: Science Weekly>, <Publication: The Python Journal>]
-
->>> Publication.objects.filter(article__id__exact=1)
-[<Publication: The Python Journal>]
->>> Publication.objects.filter(article__pk=1)
-[<Publication: The Python Journal>]
->>> Publication.objects.filter(article=1)
-[<Publication: The Python Journal>]
->>> Publication.objects.filter(article=a1)
-[<Publication: The Python Journal>]
-
->>> Publication.objects.filter(article__in=[1,2]).distinct()
-[<Publication: Highlights for Children>, <Publication: Science News>, <Publication: Science Weekly>, <Publication: The Python Journal>]
->>> Publication.objects.filter(article__in=[1,a2]).distinct()
-[<Publication: Highlights for Children>, <Publication: Science News>, <Publication: Science Weekly>, <Publication: The Python Journal>]
->>> Publication.objects.filter(article__in=[a1,a2]).distinct()
-[<Publication: Highlights for Children>, <Publication: Science News>, <Publication: Science Weekly>, <Publication: The Python Journal>]
-
-# If we delete a Publication, its Articles won't be able to access it.
->>> p1.delete()
->>> Publication.objects.all()
-[<Publication: Highlights for Children>, <Publication: Science News>, <Publication: Science Weekly>]
->>> a1 = Article.objects.get(pk=1)
->>> a1.publications.all()
-[]
-
-# If we delete an Article, its Publications won't be able to access it.
->>> a2.delete()
->>> Article.objects.all()
-[<Article: Django lets you build Web apps easily>]
->>> p2.article_set.all()
-[]
-
-# Adding via the 'other' end of an m2m
->>> a4 = Article(headline='NASA finds intelligent life on Earth')
->>> a4.save()
->>> p2.article_set.add(a4)
->>> p2.article_set.all()
-[<Article: NASA finds intelligent life on Earth>]
->>> a4.publications.all()
-[<Publication: Science News>]
-
-# Adding via the other end using keywords
->>> new_article = p2.article_set.create(headline='Oxygen-free diet works wonders')
->>> p2.article_set.all()
-[<Article: NASA finds intelligent life on Earth>, <Article: Oxygen-free diet works wonders>]
->>> a5 = p2.article_set.all()[1]
->>> a5.publications.all()
-[<Publication: Science News>]
-
-# Removing publication from an article:
->>> a4.publications.remove(p2)
->>> p2.article_set.all()
-[<Article: Oxygen-free diet works wonders>]
->>> a4.publications.all()
-[]
-
-# And from the other end
->>> p2.article_set.remove(a5)
->>> p2.article_set.all()
-[]
->>> a5.publications.all()
-[]
-
-# Relation sets can be assigned. Assignment clears any existing set members
->>> p2.article_set = [a4, a5]
->>> p2.article_set.all()
-[<Article: NASA finds intelligent life on Earth>, <Article: Oxygen-free diet works wonders>]
->>> a4.publications.all()
-[<Publication: Science News>]
->>> a4.publications = [p3]
->>> p2.article_set.all()
-[<Article: Oxygen-free diet works wonders>]
->>> a4.publications.all()
-[<Publication: Science Weekly>]
-
-# Relation sets can be cleared:
->>> p2.article_set.clear()
->>> p2.article_set.all()
-[]
->>> a4.publications.all()
-[<Publication: Science Weekly>]
-
-# And you can clear from the other end
->>> p2.article_set.add(a4, a5)
->>> p2.article_set.all()
-[<Article: NASA finds intelligent life on Earth>, <Article: Oxygen-free diet works wonders>]
->>> a4.publications.all()
-[<Publication: Science News>, <Publication: Science Weekly>]
->>> a4.publications.clear()
->>> a4.publications.all()
-[]
->>> p2.article_set.all()
-[<Article: Oxygen-free diet works wonders>]
-
-# Relation sets can also be set using primary key values
->>> p2.article_set = [a4.id, a5.id]
->>> p2.article_set.all()
-[<Article: NASA finds intelligent life on Earth>, <Article: Oxygen-free diet works wonders>]
->>> a4.publications.all()
-[<Publication: Science News>]
->>> a4.publications = [p3.id]
->>> p2.article_set.all()
-[<Article: Oxygen-free diet works wonders>]
->>> a4.publications.all()
-[<Publication: Science Weekly>]
-
-# Recreate the article and Publication we have deleted.
->>> p1 = Publication(id=None, title='The Python Journal')
->>> p1.save()
->>> a2 = Article(id=None, headline='NASA uses Python')
->>> a2.save()
->>> a2.publications.add(p1, p2, p3)
-
-# Bulk delete some Publications - references to deleted publications should go
->>> Publication.objects.filter(title__startswith='Science').delete()
->>> Publication.objects.all()
-[<Publication: Highlights for Children>, <Publication: The Python Journal>]
->>> Article.objects.all()
-[<Article: Django lets you build Web apps easily>, <Article: NASA finds intelligent life on Earth>, <Article: NASA uses Python>, <Article: Oxygen-free diet works wonders>]
->>> a2.publications.all()
-[<Publication: The Python Journal>]
-
-# Bulk delete some articles - references to deleted objects should go
->>> q = Article.objects.filter(headline__startswith='Django')
->>> print q
-[<Article: Django lets you build Web apps easily>]
->>> q.delete()
-
-# After the delete, the QuerySet cache needs to be cleared, and the referenced objects should be gone
->>> print q
-[]
->>> p1.article_set.all()
-[<Article: NASA uses Python>]
-
-# An alternate to calling clear() is to assign the empty set
->>> p1.article_set = []
->>> p1.article_set.all()
-[]
-
->>> a2.publications = [p1, new_publication]
->>> a2.publications.all()
-[<Publication: Highlights for Children>, <Publication: The Python Journal>]
->>> a2.publications = []
->>> a2.publications.all()
-[]
-
-"""}
py_tasks_melange