--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/thirdparty/google_appengine/lib/django/tests/modeltests/lookup/models.py	Tue Aug 26 21:49:54 2008 +0000
@@ -0,0 +1,233 @@
+"""
+7. The lookup API
+
+This demonstrates features of the database API.
+"""
+
+from django.db import models
+
+class Article(models.Model):
+    headline = models.CharField(maxlength=100)
+    pub_date = models.DateTimeField()
+    class Meta:
+        ordering = ('-pub_date', 'headline')
+
+    def __str__(self):
+        return self.headline
+
+__test__ = {'API_TESTS':r"""
+# Create a couple of Articles.
+>>> from datetime import datetime
+>>> a1 = Article(headline='Article 1', pub_date=datetime(2005, 7, 26))
+>>> a1.save()
+>>> a2 = Article(headline='Article 2', pub_date=datetime(2005, 7, 27))
+>>> a2.save()
+>>> a3 = Article(headline='Article 3', pub_date=datetime(2005, 7, 27))
+>>> a3.save()
+>>> a4 = Article(headline='Article 4', pub_date=datetime(2005, 7, 28))
+>>> a4.save()
+>>> a5 = Article(headline='Article 5', pub_date=datetime(2005, 8, 1, 9, 0))
+>>> a5.save()
+>>> a6 = Article(headline='Article 6', pub_date=datetime(2005, 8, 1, 8, 0))
+>>> a6.save()
+>>> a7 = Article(headline='Article 7', pub_date=datetime(2005, 7, 27))
+>>> a7.save()
+
+# Each QuerySet gets iterator(), which is a generator that "lazily" returns
+# results using database-level iteration.
+>>> for a in Article.objects.iterator():
+...     print a.headline
+Article 5
+Article 6
+Article 4
+Article 2
+Article 3
+Article 7
+Article 1
+
+# iterator() can be used on any QuerySet.
+>>> for a in Article.objects.filter(headline__endswith='4').iterator():
+...     print a.headline
+Article 4
+
+# count() returns the number of objects matching search criteria.
+>>> Article.objects.count()
+7L
+>>> Article.objects.filter(pub_date__exact=datetime(2005, 7, 27)).count()
+3L
+>>> Article.objects.filter(headline__startswith='Blah blah').count()
+0L
+
+# count() should respect sliced query sets.
+>>> articles = Article.objects.all()
+>>> articles.count()
+7L
+>>> articles[:4].count()
+4
+>>> articles[1:100].count()
+6L
+>>> articles[10:100].count()
+0
+
+# Date and date/time lookups can also be done with strings.
+>>> Article.objects.filter(pub_date__exact='2005-07-27 00:00:00').count()
+3L
+
+# in_bulk() takes a list of IDs and returns a dictionary mapping IDs
+# to objects.
+>>> Article.objects.in_bulk([1, 2])
+{1: <Article: Article 1>, 2: <Article: Article 2>}
+>>> Article.objects.in_bulk([3])
+{3: <Article: Article 3>}
+>>> Article.objects.in_bulk([1000])
+{}
+>>> Article.objects.in_bulk([])
+{}
+>>> Article.objects.in_bulk('foo')
+Traceback (most recent call last):
+    ...
+AssertionError: in_bulk() must be provided with a list of IDs.
+>>> Article.objects.in_bulk()
+Traceback (most recent call last):
+    ...
+TypeError: in_bulk() takes exactly 2 arguments (1 given)
+>>> Article.objects.in_bulk(headline__startswith='Blah')
+Traceback (most recent call last):
+    ...
+TypeError: in_bulk() got an unexpected keyword argument 'headline__startswith'
+
+# values() returns a list of dictionaries instead of object instances -- and
+# you can specify which fields you want to retrieve.
+>>> Article.objects.values('headline')
+[{'headline': 'Article 5'}, {'headline': 'Article 6'}, {'headline': 'Article 4'}, {'headline': 'Article 2'}, {'headline': 'Article 3'}, {'headline': 'Article 7'}, {'headline': 'Article 1'}]
+>>> Article.objects.filter(pub_date__exact=datetime(2005, 7, 27)).values('id')
+[{'id': 2}, {'id': 3}, {'id': 7}]
+>>> list(Article.objects.values('id', 'headline')) == [{'id': 5, 'headline': 'Article 5'}, {'id': 6, 'headline': 'Article 6'}, {'id': 4, 'headline': 'Article 4'}, {'id': 2, 'headline': 'Article 2'}, {'id': 3, 'headline': 'Article 3'}, {'id': 7, 'headline': 'Article 7'}, {'id': 1, 'headline': 'Article 1'}]
+True
+
+>>> for d in Article.objects.values('id', 'headline'):
+...     i = d.items()
+...     i.sort()
+...     i
+[('headline', 'Article 5'), ('id', 5)]
+[('headline', 'Article 6'), ('id', 6)]
+[('headline', 'Article 4'), ('id', 4)]
+[('headline', 'Article 2'), ('id', 2)]
+[('headline', 'Article 3'), ('id', 3)]
+[('headline', 'Article 7'), ('id', 7)]
+[('headline', 'Article 1'), ('id', 1)]
+
+# You can use values() with iterator() for memory savings, because iterator()
+# uses database-level iteration.
+>>> for d in Article.objects.values('id', 'headline').iterator():
+...     i = d.items()
+...     i.sort()
+...     i
+[('headline', 'Article 5'), ('id', 5)]
+[('headline', 'Article 6'), ('id', 6)]
+[('headline', 'Article 4'), ('id', 4)]
+[('headline', 'Article 2'), ('id', 2)]
+[('headline', 'Article 3'), ('id', 3)]
+[('headline', 'Article 7'), ('id', 7)]
+[('headline', 'Article 1'), ('id', 1)]
+
+# if you don't specify which fields, all are returned
+>>> list(Article.objects.filter(id=5).values()) == [{'id': 5, 'headline': 'Article 5', 'pub_date': datetime(2005, 8, 1, 9, 0)}]
+True
+
+# Every DateField and DateTimeField creates get_next_by_FOO() and
+# get_previous_by_FOO() methods.
+# In the case of identical date values, these methods will use the ID as a
+# fallback check. This guarantees that no records are skipped or duplicated.
+>>> a1.get_next_by_pub_date()
+<Article: Article 2>
+>>> a2.get_next_by_pub_date()
+<Article: Article 3>
+>>> a2.get_next_by_pub_date(headline__endswith='6')
+<Article: Article 6>
+>>> a3.get_next_by_pub_date()
+<Article: Article 7>
+>>> a4.get_next_by_pub_date()
+<Article: Article 6>
+>>> a5.get_next_by_pub_date()
+Traceback (most recent call last):
+    ...
+DoesNotExist: Article matching query does not exist.
+>>> a6.get_next_by_pub_date()
+<Article: Article 5>
+>>> a7.get_next_by_pub_date()
+<Article: Article 4>
+
+>>> a7.get_previous_by_pub_date()
+<Article: Article 3>
+>>> a6.get_previous_by_pub_date()
+<Article: Article 4>
+>>> a5.get_previous_by_pub_date()
+<Article: Article 6>
+>>> a4.get_previous_by_pub_date()
+<Article: Article 7>
+>>> a3.get_previous_by_pub_date()
+<Article: Article 2>
+>>> a2.get_previous_by_pub_date()
+<Article: Article 1>
+
+# Underscores and percent signs have special meaning in the underlying
+# SQL code, but Django handles the quoting of them automatically.
+>>> a8 = Article(headline='Article_ with underscore', pub_date=datetime(2005, 11, 20))
+>>> a8.save()
+>>> Article.objects.filter(headline__startswith='Article')
+[<Article: Article_ with underscore>, <Article: Article 5>, <Article: Article 6>, <Article: Article 4>, <Article: Article 2>, <Article: Article 3>, <Article: Article 7>, <Article: Article 1>]
+>>> Article.objects.filter(headline__startswith='Article_')
+[<Article: Article_ with underscore>]
+
+>>> a9 = Article(headline='Article% with percent sign', pub_date=datetime(2005, 11, 21))
+>>> a9.save()
+>>> Article.objects.filter(headline__startswith='Article')
+[<Article: Article% with percent sign>, <Article: Article_ with underscore>, <Article: Article 5>, <Article: Article 6>, <Article: Article 4>, <Article: Article 2>, <Article: Article 3>, <Article: Article 7>, <Article: Article 1>]
+>>> Article.objects.filter(headline__startswith='Article%')
+[<Article: Article% with percent sign>]
+
+# exclude() is the opposite of filter() when doing lookups:
+>>> Article.objects.filter(headline__contains='Article').exclude(headline__contains='with')
+[<Article: Article 5>, <Article: Article 6>, <Article: Article 4>, <Article: Article 2>, <Article: Article 3>, <Article: Article 7>, <Article: Article 1>]
+>>> Article.objects.exclude(headline__startswith="Article_")
+[<Article: Article% with percent sign>, <Article: Article 5>, <Article: Article 6>, <Article: Article 4>, <Article: Article 2>, <Article: Article 3>, <Article: Article 7>, <Article: Article 1>]
+>>> Article.objects.exclude(headline="Article 7")
+[<Article: Article% with percent sign>, <Article: Article_ with underscore>, <Article: Article 5>, <Article: Article 6>, <Article: Article 4>, <Article: Article 2>, <Article: Article 3>, <Article: Article 1>]
+
+# Backslashes also have special meaning in the underlying SQL code, but Django
+# automatically quotes them appropriately.
+>>> a10 = Article(headline='Article with \\ backslash', pub_date=datetime(2005, 11, 22))
+>>> a10.save()
+>>> Article.objects.filter(headline__contains='\\')
+[<Article: Article with \ backslash>]
+
+# none() returns an EmptyQuerySet that behaves like any other QuerySet object
+>>> Article.objects.none()
+[]
+>>> Article.objects.none().filter(headline__startswith='Article')
+[]
+>>> Article.objects.none().count()
+0
+>>> [article for article in Article.objects.none().iterator()]
+[]
+
+# using __in with an empty list should return an empty query set
+>>> Article.objects.filter(id__in=[])
+[]
+
+>>> Article.objects.exclude(id__in=[])
+[<Article: Article with \ backslash>, <Article: Article% with percent sign>, <Article: Article_ with underscore>, <Article: Article 5>, <Article: Article 6>, <Article: Article 4>, <Article: Article 2>, <Article: Article 3>, <Article: Article 7>, <Article: Article 1>]
+
+# Programming errors are pointed out with nice error messages
+>>> Article.objects.filter(pub_date_year='2005').count()
+Traceback (most recent call last):
+    ...
+TypeError: Cannot resolve keyword 'pub_date_year' into field
+
+>>> Article.objects.filter(headline__starts='Article')
+Traceback (most recent call last):
+    ...
+TypeError: Cannot resolve keyword 'headline__starts' into field
+
+"""}