Python Article.headline方法代码示例

# 需要导入模块: from models import Article [as 别名]
# 或者: from models.Article import headline [as 别名]
    def test_article_defaults(self):
        # No articles are in the system yet.
        self.assertEqual(len(Article.objects.all()), 0)
        
        # Create an Article.
        a = Article(id=None)

        # Grab the current datetime it should be very close to the
        # default that just got saved as a.pub_date
        now = datetime.now()

        # 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".
        self.assertEqual(a.id, 1L)

        # Access database columns via Python attributes.
        self.assertEqual(a.headline, u'Default headline')

        # make sure the two dates are sufficiently close
        self.assertAlmostEqual(now, a.pub_date, delta=timedelta(5))

        # make sure that SafeString/SafeUnicode fields work
        a.headline = SafeUnicode(u'Iñtërnâtiônàlizætiøn1')
        a.save()
        a.headline = SafeString(u'Iñtërnâtiônàlizætiøn1'.encode('utf-8'))
        a.save()

# 需要导入模块: from models import Article [as 别名]
# 或者: from models.Article import headline [as 别名]
    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>"])

#.........这里部分代码省略.........

# 需要导入模块: from models import Article [as 别名]
# 或者: from models.Article import headline [as 别名]
    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())

#.........这里部分代码省略.........