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Migrated basic doctests. Thanks to Preston Timmons for the patch.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@14421 bcc190cf-cafb-0310-a4f2-bffc1f526a37
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commit 4a1571940565974dc9885c2559be06fb167e1f6f 1 parent e0a1e47
@freakboy3742 freakboy3742 authored
Showing with 554 additions and 408 deletions.
  1. +0 −408 tests/modeltests/basic/models.py
  2. +554 −0 tests/modeltests/basic/tests.py
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408 tests/modeltests/basic/models.py
@@ -15,411 +15,3 @@ class Meta:
def __unicode__(self):
return self.headline
-
-__test__ = {'API_TESTS': """
-# No articles are in the system yet.
->>> Article.objects.all()
-[]
-
-# Create an Article.
->>> from datetime import datetime
->>> a = Article(id=None, headline='Area man programs in Python', pub_date=datetime(2005, 7, 28))
-
-# Save it into the database. You have to call save() explicitly.
->>> a.save()
-
-# Now it has an ID. Note it's a long integer, as designated by the trailing "L".
->>> a.id
-1L
-
-# Models have a pk property that is an alias for the primary key attribute (by
-# default, the 'id' attribute).
->>> a.pk
-1L
-
-# Access database columns via Python attributes.
->>> a.headline
-'Area man programs in Python'
->>> a.pub_date
-datetime.datetime(2005, 7, 28, 0, 0)
-
-# Change values by changing the attributes, then calling save().
->>> a.headline = 'Area woman programs in Python'
->>> a.save()
-
-# Article.objects.all() returns all the articles in the database.
->>> Article.objects.all()
-[<Article: Area woman programs in Python>]
-
-# Django provides a rich database lookup API.
->>> Article.objects.get(id__exact=1)
-<Article: Area woman programs in Python>
->>> Article.objects.get(headline__startswith='Area woman')
-<Article: Area woman programs in Python>
->>> Article.objects.get(pub_date__year=2005)
-<Article: Area woman programs in Python>
->>> Article.objects.get(pub_date__year=2005, pub_date__month=7)
-<Article: Area woman programs in Python>
->>> Article.objects.get(pub_date__year=2005, pub_date__month=7, pub_date__day=28)
-<Article: Area woman programs in Python>
->>> Article.objects.get(pub_date__week_day=5)
-<Article: Area woman programs in Python>
-
-# The "__exact" lookup type can be omitted, as a shortcut.
->>> Article.objects.get(id=1)
-<Article: Area woman programs in Python>
->>> Article.objects.get(headline='Area woman programs in Python')
-<Article: Area woman programs in Python>
-
->>> Article.objects.filter(pub_date__year=2005)
-[<Article: Area woman programs in Python>]
->>> Article.objects.filter(pub_date__year=2004)
-[]
->>> Article.objects.filter(pub_date__year=2005, pub_date__month=7)
-[<Article: Area woman programs in Python>]
-
->>> Article.objects.filter(pub_date__week_day=5)
-[<Article: Area woman programs in Python>]
->>> Article.objects.filter(pub_date__week_day=6)
-[]
-
-# Django raises an Article.DoesNotExist exception for get() if the parameters
-# don't match any object.
->>> Article.objects.get(id__exact=2)
-Traceback (most recent call last):
- ...
-DoesNotExist: Article matching query does not exist.
-
->>> Article.objects.get(pub_date__year=2005, pub_date__month=8)
-Traceback (most recent call last):
- ...
-DoesNotExist: Article matching query does not exist.
-
->>> Article.objects.get(pub_date__week_day=6)
-Traceback (most recent call last):
- ...
-DoesNotExist: Article matching query does not exist.
-
-# Lookup by a primary key is the most common case, so Django provides a
-# shortcut for primary-key exact lookups.
-# The following is identical to articles.get(id=1).
->>> Article.objects.get(pk=1)
-<Article: Area woman programs in Python>
-
-# pk can be used as a shortcut for the primary key name in any query
->>> Article.objects.filter(pk__in=[1])
-[<Article: Area woman programs in Python>]
-
-# Model instances of the same type and same ID are considered equal.
->>> a = Article.objects.get(pk=1)
->>> b = Article.objects.get(pk=1)
->>> a == b
-True
-
-# You can initialize a model instance using positional arguments, which should
-# match the field order as defined in the model.
->>> a2 = Article(None, 'Second article', datetime(2005, 7, 29))
->>> a2.save()
->>> a2.id
-2L
->>> a2.headline
-'Second article'
->>> a2.pub_date
-datetime.datetime(2005, 7, 29, 0, 0)
-
-# ...or, you can use keyword arguments.
->>> a3 = Article(id=None, headline='Third article', pub_date=datetime(2005, 7, 30))
->>> a3.save()
->>> a3.id
-3L
->>> a3.headline
-'Third article'
->>> a3.pub_date
-datetime.datetime(2005, 7, 30, 0, 0)
-
-# You can also mix and match position and keyword arguments, but be sure not to
-# duplicate field information.
->>> a4 = Article(None, 'Fourth article', pub_date=datetime(2005, 7, 31))
->>> a4.save()
->>> a4.headline
-'Fourth article'
-
-# Don't use invalid keyword arguments.
->>> a5 = Article(id=None, headline='Invalid', pub_date=datetime(2005, 7, 31), foo='bar')
-Traceback (most recent call last):
- ...
-TypeError: 'foo' is an invalid keyword argument for this function
-
-# You can leave off the value for an AutoField when creating an object, because
-# it'll get filled in automatically when you save().
->>> a5 = Article(headline='Article 6', pub_date=datetime(2005, 7, 31))
->>> a5.save()
->>> a5.id
-5L
->>> a5.headline
-'Article 6'
-
-# If you leave off a field with "default" set, Django will use the default.
->>> a6 = Article(pub_date=datetime(2005, 7, 31))
->>> a6.save()
->>> a6.headline
-u'Default headline'
-
-# For DateTimeFields, Django saves as much precision (in seconds) as you
-# give it.
->>> a7 = Article(headline='Article 7', pub_date=datetime(2005, 7, 31, 12, 30))
->>> a7.save()
->>> Article.objects.get(id__exact=7).pub_date
-datetime.datetime(2005, 7, 31, 12, 30)
-
->>> a8 = Article(headline='Article 8', pub_date=datetime(2005, 7, 31, 12, 30, 45))
->>> a8.save()
->>> Article.objects.get(id__exact=8).pub_date
-datetime.datetime(2005, 7, 31, 12, 30, 45)
->>> a8.id
-8L
-
-# Saving an object again doesn't create a new object -- it just saves the old one.
->>> a8.save()
->>> a8.id
-8L
->>> a8.headline = 'Updated article 8'
->>> a8.save()
->>> a8.id
-8L
-
->>> a7 == a8
-False
->>> a8 == Article.objects.get(id__exact=8)
-True
->>> a7 != a8
-True
->>> Article.objects.get(id__exact=8) != Article.objects.get(id__exact=7)
-True
->>> Article.objects.get(id__exact=8) == Article.objects.get(id__exact=7)
-False
-
-# You can use 'in' to test for membership...
->>> a8 in Article.objects.all()
-True
-
-# ... but there will often be more efficient ways if that is all you need:
->>> Article.objects.filter(id=a8.id).exists()
-True
-
-# dates() returns a list of available dates of the given scope for the given field.
->>> Article.objects.dates('pub_date', 'year')
-[datetime.datetime(2005, 1, 1, 0, 0)]
->>> Article.objects.dates('pub_date', 'month')
-[datetime.datetime(2005, 7, 1, 0, 0)]
->>> Article.objects.dates('pub_date', 'day')
-[datetime.datetime(2005, 7, 28, 0, 0), datetime.datetime(2005, 7, 29, 0, 0), datetime.datetime(2005, 7, 30, 0, 0), datetime.datetime(2005, 7, 31, 0, 0)]
->>> Article.objects.dates('pub_date', 'day', order='ASC')
-[datetime.datetime(2005, 7, 28, 0, 0), datetime.datetime(2005, 7, 29, 0, 0), datetime.datetime(2005, 7, 30, 0, 0), datetime.datetime(2005, 7, 31, 0, 0)]
->>> Article.objects.dates('pub_date', 'day', order='DESC')
-[datetime.datetime(2005, 7, 31, 0, 0), datetime.datetime(2005, 7, 30, 0, 0), datetime.datetime(2005, 7, 29, 0, 0), datetime.datetime(2005, 7, 28, 0, 0)]
-
-# dates() requires valid arguments.
-
->>> Article.objects.dates()
-Traceback (most recent call last):
- ...
-TypeError: dates() takes at least 3 arguments (1 given)
-
->>> Article.objects.dates('invalid_field', 'year')
-Traceback (most recent call last):
- ...
-FieldDoesNotExist: Article has no field named 'invalid_field'
-
->>> Article.objects.dates('pub_date', 'bad_kind')
-Traceback (most recent call last):
- ...
-AssertionError: 'kind' must be one of 'year', 'month' or 'day'.
-
->>> Article.objects.dates('pub_date', 'year', order='bad order')
-Traceback (most recent call last):
- ...
-AssertionError: 'order' must be either 'ASC' or 'DESC'.
-
-# Use iterator() with dates() to return a generator that lazily requests each
-# result one at a time, to save memory.
->>> for a in Article.objects.dates('pub_date', 'day', order='DESC').iterator():
-... print repr(a)
-datetime.datetime(2005, 7, 31, 0, 0)
-datetime.datetime(2005, 7, 30, 0, 0)
-datetime.datetime(2005, 7, 29, 0, 0)
-datetime.datetime(2005, 7, 28, 0, 0)
-
-# You can combine queries with & and |.
->>> s1 = Article.objects.filter(id__exact=1)
->>> s2 = Article.objects.filter(id__exact=2)
->>> s1 | s2
-[<Article: Area woman programs in Python>, <Article: Second article>]
->>> s1 & s2
-[]
-
-# You can get the number of objects like this:
->>> len(Article.objects.filter(id__exact=1))
-1
-
-# You can get items using index and slice notation.
->>> Article.objects.all()[0]
-<Article: Area woman programs in Python>
->>> Article.objects.all()[1:3]
-[<Article: Second article>, <Article: Third article>]
->>> s3 = Article.objects.filter(id__exact=3)
->>> (s1 | s2 | s3)[::2]
-[<Article: Area woman programs in Python>, <Article: Third article>]
-
-# Slicing works with longs.
->>> Article.objects.all()[0L]
-<Article: Area woman programs in Python>
->>> Article.objects.all()[1L:3L]
-[<Article: Second article>, <Article: Third article>]
->>> s3 = Article.objects.filter(id__exact=3)
->>> (s1 | s2 | s3)[::2L]
-[<Article: Area woman programs in Python>, <Article: Third article>]
-
-# And can be mixed with ints.
->>> Article.objects.all()[1:3L]
-[<Article: Second article>, <Article: Third article>]
-
-# Slices (without step) are lazy:
->>> Article.objects.all()[0:5].filter()
-[<Article: Area woman programs in Python>, <Article: Second article>, <Article: Third article>, <Article: Article 6>, <Article: Default headline>]
-
-# Slicing again works:
->>> Article.objects.all()[0:5][0:2]
-[<Article: Area woman programs in Python>, <Article: Second article>]
->>> Article.objects.all()[0:5][:2]
-[<Article: Area woman programs in Python>, <Article: Second article>]
->>> Article.objects.all()[0:5][4:]
-[<Article: Default headline>]
->>> Article.objects.all()[0:5][5:]
-[]
-
-# Some more tests!
->>> Article.objects.all()[2:][0:2]
-[<Article: Third article>, <Article: Article 6>]
->>> Article.objects.all()[2:][:2]
-[<Article: Third article>, <Article: Article 6>]
->>> Article.objects.all()[2:][2:3]
-[<Article: Default headline>]
-
-# Using an offset without a limit is also possible.
->>> Article.objects.all()[5:]
-[<Article: Fourth article>, <Article: Article 7>, <Article: Updated article 8>]
-
-# Also, once you have sliced you can't filter, re-order or combine
->>> Article.objects.all()[0:5].filter(id=1)
-Traceback (most recent call last):
- ...
-AssertionError: Cannot filter a query once a slice has been taken.
-
->>> Article.objects.all()[0:5].order_by('id')
-Traceback (most recent call last):
- ...
-AssertionError: Cannot reorder a query once a slice has been taken.
-
->>> Article.objects.all()[0:1] & Article.objects.all()[4:5]
-Traceback (most recent call last):
- ...
-AssertionError: Cannot combine queries once a slice has been taken.
-
-# Negative slices are not supported, due to database constraints.
-# (hint: inverting your ordering might do what you need).
->>> Article.objects.all()[-1]
-Traceback (most recent call last):
- ...
-AssertionError: Negative indexing is not supported.
->>> Article.objects.all()[0:-5]
-Traceback (most recent call last):
- ...
-AssertionError: Negative indexing is not supported.
-
-# An Article instance doesn't have access to the "objects" attribute.
-# That's only available on the class.
->>> a7.objects.all()
-Traceback (most recent call last):
- ...
-AttributeError: Manager isn't accessible via Article instances
-
->>> a7.objects
-Traceback (most recent call last):
- ...
-AttributeError: Manager isn't accessible via Article instances
-
-# Bulk delete test: How many objects before and after the delete?
->>> Article.objects.all()
-[<Article: Area woman programs in Python>, <Article: Second article>, <Article: Third article>, <Article: Article 6>, <Article: Default headline>, <Article: Fourth article>, <Article: Article 7>, <Article: Updated article 8>]
->>> Article.objects.filter(id__lte=4).delete()
->>> Article.objects.all()
-[<Article: Article 6>, <Article: Default headline>, <Article: Article 7>, <Article: Updated article 8>]
-"""}
-
-from django.conf import settings
-
-if connection.features.supports_microsecond_precision:
- __test__['API_TESTS'] += """
-# In PostgreSQL, microsecond-level precision is available.
->>> a9 = Article(headline='Article 9', pub_date=datetime(2005, 7, 31, 12, 30, 45, 180))
->>> a9.save()
->>> Article.objects.get(id__exact=9).pub_date
-datetime.datetime(2005, 7, 31, 12, 30, 45, 180)
-"""
-else:
- __test__['API_TESTS'] += """
-# In MySQL, microsecond-level precision isn't available. You'll lose
-# microsecond-level precision once the data is saved.
->>> a9 = Article(headline='Article 9', pub_date=datetime(2005, 7, 31, 12, 30, 45, 180))
->>> a9.save()
->>> Article.objects.get(id__exact=9).pub_date
-datetime.datetime(2005, 7, 31, 12, 30, 45)
-"""
-
-__test__['API_TESTS'] += """
-
-# You can manually specify the primary key when creating a new object.
->>> a101 = Article(id=101, headline='Article 101', pub_date=datetime(2005, 7, 31, 12, 30, 45))
->>> a101.save()
->>> a101 = Article.objects.get(pk=101)
->>> a101.headline
-u'Article 101'
-
-# You can create saved objects in a single step
->>> a10 = Article.objects.create(headline="Article 10", pub_date=datetime(2005, 7, 31, 12, 30, 45))
->>> Article.objects.get(headline="Article 10")
-<Article: Article 10>
-
-# Edge-case test: A year lookup should retrieve all objects in the given
-year, including Jan. 1 and Dec. 31.
->>> a11 = Article.objects.create(headline='Article 11', pub_date=datetime(2008, 1, 1))
->>> a12 = Article.objects.create(headline='Article 12', pub_date=datetime(2008, 12, 31, 23, 59, 59, 999999))
->>> Article.objects.filter(pub_date__year=2008)
-[<Article: Article 11>, <Article: Article 12>]
-
-# Unicode data works, too.
->>> a = Article(headline=u'\u6797\u539f \u3081\u3050\u307f', pub_date=datetime(2005, 7, 28))
->>> a.save()
->>> Article.objects.get(pk=a.id).headline
-u'\u6797\u539f \u3081\u3050\u307f'
-
-# Model instances have a hash function, so they can be used in sets or as
-# dictionary keys. Two models compare as equal if their primary keys are equal.
->>> s = set([a10, a11, a12])
->>> Article.objects.get(headline='Article 11') in s
-True
-
-# The 'select' argument to extra() supports names with dashes in them, as long
-# as you use values().
->>> dicts = Article.objects.filter(pub_date__year=2008).extra(select={'dashed-value': '1'}).values('headline', 'dashed-value')
->>> [sorted(d.items()) for d in dicts]
-[[('dashed-value', 1), ('headline', u'Article 11')], [('dashed-value', 1), ('headline', u'Article 12')]]
-
-# If you use 'select' with extra() and names containing dashes on a query
-# that's *not* a values() query, those extra 'select' values will silently be
-# ignored.
->>> articles = Article.objects.filter(pub_date__year=2008).extra(select={'dashed-value': '1', 'undashedvalue': '2'})
->>> articles[0].undashedvalue
-2
-"""
View
554 tests/modeltests/basic/tests.py
@@ -0,0 +1,554 @@
+from datetime import datetime
+
+from django.core.exceptions import ObjectDoesNotExist
+from django.db import models, DEFAULT_DB_ALIAS, connection
+from django.db.models.fields import FieldDoesNotExist
+from django.test import TestCase, skipIfDBFeature, skipUnlessDBFeature
+
+from models import Article
+
+
+class ModelTest(TestCase):
+
+ def test_lookup(self):
+ # No articles are in the system yet.
+ self.assertQuerysetEqual(Article.objects.all(), [])
+
+ # Create an Article.
+ a = Article(
+ id=None,
+ headline='Area man programs in Python',
+ pub_date=datetime(2005, 7, 28),
+ )
+
+ # Save it into the database. You have to call save() explicitly.
+ a.save()
+
+ # Now it has an ID.
+ self.assertTrue(a.id != None)
+
+ # Models have a pk property that is an alias for the primary key
+ # attribute (by default, the 'id' attribute).
+ self.assertEqual(a.pk, a.id)
+
+ # Access database columns via Python attributes.
+ self.assertEqual(a.headline, 'Area man programs in Python')
+ self.assertEqual(a.pub_date, datetime(2005, 7, 28, 0, 0))
+
+ # Change values by changing the attributes, then calling save().
+ a.headline = 'Area woman programs in Python'
+ a.save()
+
+ # Article.objects.all() returns all the articles in the database.
+ self.assertQuerysetEqual(Article.objects.all(),
+ ['<Article: Area woman programs in Python>'])
+
+ # Django provides a rich database lookup API.
+ self.assertEqual(Article.objects.get(id__exact=a.id), a)
+ self.assertEqual(Article.objects.get(headline__startswith='Area woman'), a)
+ self.assertEqual(Article.objects.get(pub_date__year=2005), a)
+ self.assertEqual(Article.objects.get(pub_date__year=2005, pub_date__month=7), a)
+ self.assertEqual(Article.objects.get(pub_date__year=2005, pub_date__month=7, pub_date__day=28), a)
+ self.assertEqual(Article.objects.get(pub_date__week_day=5), a)
+
+ # The "__exact" lookup type can be omitted, as a shortcut.
+ self.assertEqual(Article.objects.get(id=a.id), a)
+ self.assertEqual(Article.objects.get(headline='Area woman programs in Python'), a)
+
+ self.assertQuerysetEqual(
+ Article.objects.filter(pub_date__year=2005),
+ ['<Article: Area woman programs in Python>'],
+ )
+ self.assertQuerysetEqual(
+ Article.objects.filter(pub_date__year=2004),
+ [],
+ )
+ self.assertQuerysetEqual(
+ Article.objects.filter(pub_date__year=2005, pub_date__month=7),
+ ['<Article: Area woman programs in Python>'],
+ )
+
+ self.assertQuerysetEqual(
+ Article.objects.filter(pub_date__week_day=5),
+ ['<Article: Area woman programs in Python>'],
+ )
+ self.assertQuerysetEqual(
+ Article.objects.filter(pub_date__week_day=6),
+ [],
+ )
+
+ # Django raises an Article.DoesNotExist exception for get() if the
+ # parameters don't match any object.
+ self.assertRaisesRegexp(
+ ObjectDoesNotExist,
+ "Article matching query does not exist.",
+ Article.objects.get,
+ id__exact=2000,
+ )
+
+ self.assertRaisesRegexp(
+ ObjectDoesNotExist,
+ "Article matching query does not exist.",
+ Article.objects.get,
+ pub_date__year=2005,
+ pub_date__month=8,
+ )
+
+ self.assertRaisesRegexp(
+ ObjectDoesNotExist,
+ "Article matching query does not exist.",
+ Article.objects.get,
+ pub_date__week_day=6,
+ )
+
+ # Lookup by a primary key is the most common case, so Django
+ # provides a shortcut for primary-key exact lookups.
+ # The following is identical to articles.get(id=a.id).
+ self.assertEqual(Article.objects.get(pk=a.id), a)
+
+ # pk can be used as a shortcut for the primary key name in any query.
+ self.assertQuerysetEqual(Article.objects.filter(pk__in=[a.id]),
+ ["<Article: Area woman programs in Python>"])
+
+ # Model instances of the same type and same ID are considered equal.
+ a = Article.objects.get(pk=a.id)
+ b = Article.objects.get(pk=a.id)
+ self.assertEqual(a, b)
+
+ def test_object_creation(self):
+ # Create an Article.
+ a = Article(
+ id=None,
+ headline='Area man programs in Python',
+ pub_date=datetime(2005, 7, 28),
+ )
+
+ # Save it into the database. You have to call save() explicitly.
+ a.save()
+
+ # You can initialize a model instance using positional arguments,
+ # which should match the field order as defined in the model.
+ a2 = Article(None, 'Second article', datetime(2005, 7, 29))
+ a2.save()
+
+ self.assertNotEqual(a2.id, a.id)
+ self.assertEqual(a2.headline, 'Second article')
+ self.assertEqual(a2.pub_date, datetime(2005, 7, 29, 0, 0))
+
+ # ...or, you can use keyword arguments.
+ a3 = Article(
+ id=None,
+ headline='Third article',
+ pub_date=datetime(2005, 7, 30),
+ )
+ a3.save()
+
+ self.assertNotEqual(a3.id, a.id)
+ self.assertNotEqual(a3.id, a2.id)
+ self.assertEqual(a3.headline, 'Third article')
+ self.assertEqual(a3.pub_date, datetime(2005, 7, 30, 0, 0))
+
+ # You can also mix and match position and keyword arguments, but
+ # be sure not to duplicate field information.
+ a4 = Article(None, 'Fourth article', pub_date=datetime(2005, 7, 31))
+ a4.save()
+ self.assertEqual(a4.headline, 'Fourth article')
+
+ # Don't use invalid keyword arguments.
+ self.assertRaisesRegexp(
+ TypeError,
+ "'foo' is an invalid keyword argument for this function",
+ Article,
+ id=None,
+ headline='Invalid',
+ pub_date=datetime(2005, 7, 31),
+ foo='bar',
+ )
+
+ # You can leave off the value for an AutoField when creating an
+ # object, because it'll get filled in automatically when you save().
+ a5 = Article(headline='Article 6', pub_date=datetime(2005, 7, 31))
+ a5.save()
+ self.assertEqual(a5.headline, 'Article 6')
+
+ # If you leave off a field with "default" set, Django will use
+ # the default.
+ a6 = Article(pub_date=datetime(2005, 7, 31))
+ a6.save()
+ self.assertEqual(a6.headline, u'Default headline')
+
+ # For DateTimeFields, Django saves as much precision (in seconds)
+ # as you give it.
+ a7 = Article(
+ headline='Article 7',
+ pub_date=datetime(2005, 7, 31, 12, 30),
+ )
+ a7.save()
+ self.assertEqual(Article.objects.get(id__exact=a7.id).pub_date,
+ datetime(2005, 7, 31, 12, 30))
+
+ a8 = Article(
+ headline='Article 8',
+ pub_date=datetime(2005, 7, 31, 12, 30, 45),
+ )
+ a8.save()
+ self.assertEqual(Article.objects.get(id__exact=a8.id).pub_date,
+ datetime(2005, 7, 31, 12, 30, 45))
+
+ # Saving an object again doesn't create a new object -- it just saves
+ # the old one.
+ current_id = a8.id
+ a8.save()
+ self.assertEqual(a8.id, current_id)
+ a8.headline = 'Updated article 8'
+ a8.save()
+ self.assertEqual(a8.id, current_id)
+
+ # Check that != and == operators behave as expecte on instances
+ self.assertTrue(a7 != a8)
+ self.assertFalse(a7 == a8)
+ self.assertEqual(a8, Article.objects.get(id__exact=a8.id))
+
+ self.assertTrue(Article.objects.get(id__exact=a8.id) != Article.objects.get(id__exact=a7.id))
+ self.assertFalse(Article.objects.get(id__exact=a8.id) == Article.objects.get(id__exact=a7.id))
+
+ # You can use 'in' to test for membership...
+ self.assertTrue(a8 in Article.objects.all())
+
+ # ... but there will often be more efficient ways if that is all you need:
+ self.assertTrue(Article.objects.filter(id=a8.id).exists())
+
+ # dates() returns a list of available dates of the given scope for
+ # the given field.
+ self.assertQuerysetEqual(
+ Article.objects.dates('pub_date', 'year'),
+ ["datetime.datetime(2005, 1, 1, 0, 0)"])
+ self.assertQuerysetEqual(
+ Article.objects.dates('pub_date', 'month'),
+ ["datetime.datetime(2005, 7, 1, 0, 0)"])
+ self.assertQuerysetEqual(
+ Article.objects.dates('pub_date', 'day'),
+ ["datetime.datetime(2005, 7, 28, 0, 0)",
+ "datetime.datetime(2005, 7, 29, 0, 0)",
+ "datetime.datetime(2005, 7, 30, 0, 0)",
+ "datetime.datetime(2005, 7, 31, 0, 0)"])
+ self.assertQuerysetEqual(
+ Article.objects.dates('pub_date', 'day', order='ASC'),
+ ["datetime.datetime(2005, 7, 28, 0, 0)",
+ "datetime.datetime(2005, 7, 29, 0, 0)",
+ "datetime.datetime(2005, 7, 30, 0, 0)",
+ "datetime.datetime(2005, 7, 31, 0, 0)"])
+ self.assertQuerysetEqual(
+ Article.objects.dates('pub_date', 'day', order='DESC'),
+ ["datetime.datetime(2005, 7, 31, 0, 0)",
+ "datetime.datetime(2005, 7, 30, 0, 0)",
+ "datetime.datetime(2005, 7, 29, 0, 0)",
+ "datetime.datetime(2005, 7, 28, 0, 0)"])
+
+ # dates() requires valid arguments.
+ self.assertRaisesRegexp(
+ TypeError,
+ "dates\(\) takes at least 3 arguments \(1 given\)",
+ Article.objects.dates,
+ )
+
+ self.assertRaisesRegexp(
+ FieldDoesNotExist,
+ "Article has no field named 'invalid_field'",
+ Article.objects.dates,
+ "invalid_field",
+ "year",
+ )
+
+ self.assertRaisesRegexp(
+ AssertionError,
+ "'kind' must be one of 'year', 'month' or 'day'.",
+ Article.objects.dates,
+ "pub_date",
+ "bad_kind",
+ )
+
+ self.assertRaisesRegexp(
+ AssertionError,
+ "'order' must be either 'ASC' or 'DESC'.",
+ Article.objects.dates,
+ "pub_date",
+ "year",
+ order="bad order",
+ )
+
+ # Use iterator() with dates() to return a generator that lazily
+ # requests each result one at a time, to save memory.
+ dates = []
+ for article in Article.objects.dates('pub_date', 'day', order='DESC').iterator():
+ dates.append(article)
+ self.assertEqual(dates, [
+ datetime(2005, 7, 31, 0, 0),
+ datetime(2005, 7, 30, 0, 0),
+ datetime(2005, 7, 29, 0, 0),
+ datetime(2005, 7, 28, 0, 0)])
+
+ # You can combine queries with & and |.
+ s1 = Article.objects.filter(id__exact=a.id)
+ s2 = Article.objects.filter(id__exact=a2.id)
+ self.assertQuerysetEqual(s1 | s2,
+ ["<Article: Area man programs in Python>",
+ "<Article: Second article>"])
+ self.assertQuerysetEqual(s1 & s2, [])
+
+ # You can get the number of objects like this:
+ self.assertEqual(len(Article.objects.filter(id__exact=a.id)), 1)
+
+ # You can get items using index and slice notation.
+ self.assertEqual(Article.objects.all()[0], a)
+ self.assertQuerysetEqual(Article.objects.all()[1:3],
+ ["<Article: Second article>", "<Article: Third article>"])
+
+ s3 = Article.objects.filter(id__exact=a3.id)
+ self.assertQuerysetEqual((s1 | s2 | s3)[::2],
+ ["<Article: Area man programs in Python>",
+ "<Article: Third article>"])
+
+ # Slicing works with longs.
+ self.assertEqual(Article.objects.all()[0L], a)
+ self.assertQuerysetEqual(Article.objects.all()[1L:3L],
+ ["<Article: Second article>", "<Article: Third article>"])
+ self.assertQuerysetEqual((s1 | s2 | s3)[::2L],
+ ["<Article: Area man programs in Python>",
+ "<Article: Third article>"])
+
+ # And can be mixed with ints.
+ self.assertQuerysetEqual(Article.objects.all()[1:3L],
+ ["<Article: Second article>", "<Article: Third article>"])
+
+ # Slices (without step) are lazy:
+ self.assertQuerysetEqual(Article.objects.all()[0:5].filter(),
+ ["<Article: Area man programs in Python>",
+ "<Article: Second article>",
+ "<Article: Third article>",
+ "<Article: Article 6>",
+ "<Article: Default headline>"])
+
+ # Slicing again works:
+ self.assertQuerysetEqual(Article.objects.all()[0:5][0:2],
+ ["<Article: Area man programs in Python>",
+ "<Article: Second article>"])
+ self.assertQuerysetEqual(Article.objects.all()[0:5][:2],
+ ["<Article: Area man programs in Python>",
+ "<Article: Second article>"])
+ self.assertQuerysetEqual(Article.objects.all()[0:5][4:],
+ ["<Article: Default headline>"])
+ self.assertQuerysetEqual(Article.objects.all()[0:5][5:], [])
+
+ # Some more tests!
+ self.assertQuerysetEqual(Article.objects.all()[2:][0:2],
+ ["<Article: Third article>", "<Article: Article 6>"])
+ self.assertQuerysetEqual(Article.objects.all()[2:][:2],
+ ["<Article: Third article>", "<Article: Article 6>"])
+ self.assertQuerysetEqual(Article.objects.all()[2:][2:3],
+ ["<Article: Default headline>"])
+
+ # Using an offset without a limit is also possible.
+ self.assertQuerysetEqual(Article.objects.all()[5:],
+ ["<Article: Fourth article>",
+ "<Article: Article 7>",
+ "<Article: Updated article 8>"])
+
+ # Also, once you have sliced you can't filter, re-order or combine
+ self.assertRaisesRegexp(
+ AssertionError,
+ "Cannot filter a query once a slice has been taken.",
+ Article.objects.all()[0:5].filter,
+ id=a.id,
+ )
+
+ self.assertRaisesRegexp(
+ AssertionError,
+ "Cannot reorder a query once a slice has been taken.",
+ Article.objects.all()[0:5].order_by,
+ 'id',
+ )
+
+ try:
+ Article.objects.all()[0:1] & Article.objects.all()[4:5]
+ self.fail('Should raise an AssertionError')
+ except AssertionError, e:
+ self.assertEqual(str(e), "Cannot combine queries once a slice has been taken.")
+ except Exception, e:
+ self.fail('Should raise an AssertionError, not %s' % e)
+
+ # Negative slices are not supported, due to database constraints.
+ # (hint: inverting your ordering might do what you need).
+ try:
+ Article.objects.all()[-1]
+ self.fail('Should raise an AssertionError')
+ except AssertionError, e:
+ self.assertEqual(str(e), "Negative indexing is not supported.")
+ except Exception, e:
+ self.fail('Should raise an AssertionError, not %s' % e)
+
+ error = None
+ try:
+ Article.objects.all()[0:-5]
+ except Exception, e:
+ error = e
+ self.assertTrue(isinstance(error, AssertionError))
+ self.assertEqual(str(error), "Negative indexing is not supported.")
+
+ # An Article instance doesn't have access to the "objects" attribute.
+ # That's only available on the class.
+ self.assertRaisesRegexp(
+ AttributeError,
+ "Manager isn't accessible via Article instances",
+ getattr,
+ a7,
+ "objects",
+ )
+
+ # Bulk delete test: How many objects before and after the delete?
+ self.assertQuerysetEqual(Article.objects.all(),
+ ["<Article: Area man programs in Python>",
+ "<Article: Second article>",
+ "<Article: Third article>",
+ "<Article: Article 6>",
+ "<Article: Default headline>",
+ "<Article: Fourth article>",
+ "<Article: Article 7>",
+ "<Article: Updated article 8>"])
+ Article.objects.filter(id__lte=a4.id).delete()
+ self.assertQuerysetEqual(Article.objects.all(),
+ ["<Article: Article 6>",
+ "<Article: Default headline>",
+ "<Article: Article 7>",
+ "<Article: Updated article 8>"])
+
+ @skipUnlessDBFeature('supports_microsecond_precision')
+ def test_microsecond_precision(self):
+ # In PostgreSQL, microsecond-level precision is available.
+ a9 = Article(
+ headline='Article 9',
+ pub_date=datetime(2005, 7, 31, 12, 30, 45, 180),
+ )
+ a9.save()
+ self.assertEqual(Article.objects.get(pk=a9.pk).pub_date,
+ datetime(2005, 7, 31, 12, 30, 45, 180))
+
+ @skipIfDBFeature('supports_microsecond_precision')
+ def test_microsecond_precision_not_supported(self):
+ # In MySQL, microsecond-level precision isn't available. You'll lose
+ # microsecond-level precision once the data is saved.
+ a9 = Article(
+ headline='Article 9',
+ pub_date=datetime(2005, 7, 31, 12, 30, 45, 180),
+ )
+ a9.save()
+ self.assertEqual(Article.objects.get(id__exact=a9.id).pub_date,
+ datetime(2005, 7, 31, 12, 30, 45))
+
+ def test_manually_specify_primary_key(self):
+ # You can manually specify the primary key when creating a new object.
+ a101 = Article(
+ id=101,
+ headline='Article 101',
+ pub_date=datetime(2005, 7, 31, 12, 30, 45),
+ )
+ a101.save()
+ a101 = Article.objects.get(pk=101)
+ self.assertEqual(a101.headline, u'Article 101')
+
+ def test_create_method(self):
+ # You can create saved objects in a single step
+ a10 = Article.objects.create(
+ headline="Article 10",
+ pub_date=datetime(2005, 7, 31, 12, 30, 45),
+ )
+ self.assertEqual(Article.objects.get(headline="Article 10"), a10)
+
+ def test_year_lookup_edge_case(self):
+ # Edge-case test: A year lookup should retrieve all objects in
+ # the given year, including Jan. 1 and Dec. 31.
+ a11 = Article.objects.create(
+ headline='Article 11',
+ pub_date=datetime(2008, 1, 1),
+ )
+ a12 = Article.objects.create(
+ headline='Article 12',
+ pub_date=datetime(2008, 12, 31, 23, 59, 59, 999999),
+ )
+ self.assertQuerysetEqual(Article.objects.filter(pub_date__year=2008),
+ ["<Article: Article 11>", "<Article: Article 12>"])
+
+ def test_unicode_data(self):
+ # Unicode data works, too.
+ a = Article(
+ headline=u'\u6797\u539f \u3081\u3050\u307f',
+ pub_date=datetime(2005, 7, 28),
+ )
+ a.save()
+ self.assertEqual(Article.objects.get(pk=a.id).headline,
+ u'\u6797\u539f \u3081\u3050\u307f')
+
+ def test_hash_function(self):
+ # Model instances have a hash function, so they can be used in sets
+ # or as dictionary keys. Two models compare as equal if their primary
+ # keys are equal.
+ a10 = Article.objects.create(
+ headline="Article 10",
+ pub_date=datetime(2005, 7, 31, 12, 30, 45),
+ )
+ a11 = Article.objects.create(
+ headline='Article 11',
+ pub_date=datetime(2008, 1, 1),
+ )
+ a12 = Article.objects.create(
+ headline='Article 12',
+ pub_date=datetime(2008, 12, 31, 23, 59, 59, 999999),
+ )
+
+ s = set([a10, a11, a12])
+ self.assertTrue(Article.objects.get(headline='Article 11') in s)
+
+ def test_extra_method_select_argument_with_dashes_and_values(self):
+ # The 'select' argument to extra() supports names with dashes in
+ # them, as long as you use values().
+ a10 = Article.objects.create(
+ headline="Article 10",
+ pub_date=datetime(2005, 7, 31, 12, 30, 45),
+ )
+ a11 = Article.objects.create(
+ headline='Article 11',
+ pub_date=datetime(2008, 1, 1),
+ )
+ a12 = Article.objects.create(
+ headline='Article 12',
+ pub_date=datetime(2008, 12, 31, 23, 59, 59, 999999),
+ )
+
+ dicts = Article.objects.filter(
+ pub_date__year=2008).extra(
+ select={'dashed-value': '1'}
+ ).values('headline', 'dashed-value')
+ self.assertEqual([sorted(d.items()) for d in dicts],
+ [[('dashed-value', 1), ('headline', u'Article 11')], [('dashed-value', 1), ('headline', u'Article 12')]])
+
+ def test_extra_method_select_argument_with_dashes(self):
+ # If you use 'select' with extra() and names containing dashes on a
+ # query that's *not* a values() query, those extra 'select' values
+ # will silently be ignored.
+ a10 = Article.objects.create(
+ headline="Article 10",
+ pub_date=datetime(2005, 7, 31, 12, 30, 45),
+ )
+ a11 = Article.objects.create(
+ headline='Article 11',
+ pub_date=datetime(2008, 1, 1),
+ )
+ a12 = Article.objects.create(
+ headline='Article 12',
+ pub_date=datetime(2008, 12, 31, 23, 59, 59, 999999),
+ )
+
+ articles = Article.objects.filter(
+ pub_date__year=2008).extra(
+ select={'dashed-value': '1', 'undashedvalue': '2'})
+ self.assertEqual(articles[0].undashedvalue, 2)
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