Commit 196cc875 authored by Tim Graham's avatar Tim Graham
Browse files

[1.6.x] Fixed #17519 -- Fixed missing SQL constraints to proxy models. 

Thanks thibaultj for the report, jenh for the patch,
and charettes for the tests.

Backport of aa830009 from master
parent b3e54f4a

django/db/backends/creation.py

+1 −1
Original line number Diff line number Diff line
@@ -146,7 +146,7 @@ class BaseDatabaseCreation(object): 
        Returns any ALTER TABLE statements to add constraints after the fact.

        """

        opts = model._meta

        if not opts.managed or opts.proxy or opts.swapped:

        if not opts.managed or opts.swapped:

            return []

        qn = self.connection.ops.quote_name

        final_output = []

tests/backends/models.py

+7 −0
Original line number Diff line number Diff line
@@ -68,11 +68,18 @@ class Reporter(models.Model): 
        return "%s %s" % (self.first_name, self.last_name)





class ReporterProxy(Reporter):

    class Meta:

        proxy = True





@python_2_unicode_compatible

class Article(models.Model):

    headline = models.CharField(max_length=100)

    pub_date = models.DateField()

    reporter = models.ForeignKey(Reporter)

    reporter_proxy = models.ForeignKey(ReporterProxy, null=True,

                                       related_name='reporter_proxy')



    def __str__(self):

        return self.headline

tests/backends/tests.py

+29 −10
Original line number Diff line number Diff line
@@ -613,12 +613,19 @@ class FkConstraintsTests(TransactionTestCase): 
        Try to create a model instance that violates a FK constraint. If it

        fails it should fail with IntegrityError.

        """

        a = models.Article(headline="This is a test", pub_date=datetime.datetime(2005, 7, 27), reporter_id=30)

        a1 = models.Article(headline="This is a test", pub_date=datetime.datetime(2005, 7, 27), reporter_id=30)

        try:

            a.save()

            a1.save()

        except IntegrityError:

            return

            pass

        else:

            self.skipTest("This backend does not support integrity checks.")

        # Now that we know this backend supports integrity checks we make sure

        # constraints are also enforced for proxy models. Refs #17519

        a2 = models.Article(headline='This is another test', reporter=self.r,

                            pub_date=datetime.datetime(2012, 8, 3),

                            reporter_proxy_id=30)

        self.assertRaises(IntegrityError, a2.save)



    def test_integrity_checks_on_update(self):

        """
@@ -627,14 +634,26 @@ class FkConstraintsTests(TransactionTestCase): 
        """

        # Create an Article.

        models.Article.objects.create(headline="Test article", pub_date=datetime.datetime(2010, 9, 4), reporter=self.r)

        # Retrive it from the DB

        a = models.Article.objects.get(headline="Test article")

        a.reporter_id = 30

        # Retrieve it from the DB

        a1 = models.Article.objects.get(headline="Test article")

        a1.reporter_id = 30

        try:

            a.save()

            a1.save()

        except IntegrityError:

            return

            pass

        else:

            self.skipTest("This backend does not support integrity checks.")

        # Now that we know this backend supports integrity checks we make sure

        # constraints are also enforced for proxy models. Refs #17519

        # Create another article

        r_proxy = models.ReporterProxy.objects.get(pk=self.r.pk)

        models.Article.objects.create(headline='Another article',

                                      pub_date=datetime.datetime(1988, 5, 15),

                                      reporter=self.r, reporter_proxy=r_proxy)

        # Retreive the second article from the DB

        a2 = models.Article.objects.get(headline='Another article')

        a2.reporter_proxy_id = 30

        self.assertRaises(IntegrityError, a2.save)



    def test_disable_constraint_checks_manually(self):

        """