[1.2.X] Fixed #14458 -- converted m2m_regress tests from doctests to...

class User(models.Model):

    name = models.CharField(max_length=30)

    friends = models.ManyToManyField(auth.User)

__test__ = {"regressions": """

# Multiple m2m references to the same model or a different model must be

# distinguished when accessing the relations through an instance attribute.

>>> s1 = SelfRefer.objects.create(name='s1')

>>> s2 = SelfRefer.objects.create(name='s2')

>>> s3 = SelfRefer.objects.create(name='s3')

>>> s1.references.add(s2)

>>> s1.related.add(s3)

>>> e1 = Entry.objects.create(name='e1')

>>> t1 = Tag.objects.create(name='t1')

>>> t2 = Tag.objects.create(name='t2')

>>> e1.topics.add(t1)

>>> e1.related.add(t2)

>>> s1.references.all()

[<SelfRefer: s2>]

>>> s1.related.all()

[<SelfRefer: s3>]

>>> e1.topics.all()

[<Tag: t1>]

>>> e1.related.all()

[<Tag: t2>]

# The secret internal related names for self-referential many-to-many fields

# shouldn't appear in the list when an error is made.

>>> SelfRefer.objects.filter(porcupine='fred')

Traceback (most recent call last):

...

FieldError: Cannot resolve keyword 'porcupine' into field. Choices are: id, name, references, related, selfreferchild, selfreferchildsibling

# Test to ensure that the relationship between two inherited models

# with a self-referential m2m field maintains symmetry

>>> sr_child = SelfReferChild(name="Hanna")

>>> sr_child.save()

>>> sr_sibling = SelfReferChildSibling(name="Beth")

>>> sr_sibling.save()

>>> sr_child.related.add(sr_sibling)

>>> sr_child.related.all()

[<SelfRefer: Beth>]

>>> sr_sibling.related.all()

[<SelfRefer: Hanna>]

# Regression for #11311 - The primary key for models in a m2m relation

# doesn't have to be an AutoField

>>> w = Worksheet(id='abc')

>>> w.save()

>>> w.delete()

# Regression for #11956 -- You can add an object to a m2m with the

# base class without causing integrity errors

>>> c1 = TagCollection.objects.create(name='c1')

>>> c1.tags = [t1,t2]

>>> c1 = TagCollection.objects.get(name='c1')

>>> c1.tags.all()

[<Tag: t1>, <Tag: t2>]

>>> t1.tag_collections.all()

[<TagCollection: c1>]

"""

}

from django.core.exceptions import FieldError

from django.test import TestCase

from models import (SelfRefer, Tag, TagCollection, Entry, SelfReferChild,

    SelfReferChildSibling, Worksheet)

class M2MRegressionTests(TestCase):

    def test_multiple_m2m(self):

        # Multiple m2m references to model must be distinguished when

        # accessing the relations through an instance attribute.

        s1 = SelfRefer.objects.create(name='s1')

        s2 = SelfRefer.objects.create(name='s2')

        s3 = SelfRefer.objects.create(name='s3')

        s1.references.add(s2)

        s1.related.add(s3)

        e1 = Entry.objects.create(name='e1')

        t1 = Tag.objects.create(name='t1')

        t2 = Tag.objects.create(name='t2')

        e1.topics.add(t1)

        e1.related.add(t2)

        self.assertQuerysetEqual(s1.references.all(), ["<SelfRefer: s2>"])

        self.assertQuerysetEqual(s1.related.all(), ["<SelfRefer: s3>"])

        self.assertQuerysetEqual(e1.topics.all(), ["<Tag: t1>"])

        self.assertQuerysetEqual(e1.related.all(), ["<Tag: t2>"])

    def test_internal_related_name_not_in_error_msg(self):

        # The secret internal related names for self-referential many-to-many

        # fields shouldn't appear in the list when an error is made.

        self.assertRaisesRegexp(FieldError,

            "Choices are: id, name, references, related, selfreferchild, selfreferchildsibling$",

            lambda: SelfRefer.objects.filter(porcupine='fred')

        )

    def test_m2m_inheritance_symmetry(self):

        # Test to ensure that the relationship between two inherited models

        # with a self-referential m2m field maintains symmetry

        sr_child = SelfReferChild(name="Hanna")

        sr_child.save()

        sr_sibling = SelfReferChildSibling(name="Beth")

        sr_sibling.save()

        sr_child.related.add(sr_sibling)

        self.assertQuerysetEqual(sr_child.related.all(), ["<SelfRefer: Beth>"])

        self.assertQuerysetEqual(sr_sibling.related.all(), ["<SelfRefer: Hanna>"])

    def test_m2m_pk_field_type(self):

        # Regression for #11311 - The primary key for models in a m2m relation

        # doesn't have to be an AutoField

        w = Worksheet(id='abc')

        w.save()

        w.delete()

    def test_add_m2m_with_base_class(self):

        # Regression for #11956 -- You can add an object to a m2m with the

        # base class without causing integrity errors

        t1 = Tag.objects.create(name='t1')

        t2 = Tag.objects.create(name='t2')

        c1 = TagCollection.objects.create(name='c1')

        c1.tags = [t1,t2]

        c1 = TagCollection.objects.get(name='c1')

        self.assertQuerysetEqual(c1.tags.all(), ["<Tag: t1>", "<Tag: t2>"])

        self.assertQuerysetEqual(t1.tag_collections.all(), ["<TagCollection: c1>"])