Commit eb85e667 authored by Andriy Sokolovskiy's avatar Andriy Sokolovskiy Committed by Tim Graham
Browse files

[1.8.x] Fixed #24156 -- Fixed inherited related name of ManyToManyField. 

Fixed situation when parent abstract model declares related_name='+'
and child models had an invalid queryset.

Backport of f7b29781 from master
parent 15359f1f

django/db/models/fields/related.py

+1 −1
Original line number Diff line number Diff line
@@ -2540,7 +2540,7 @@ class ManyToManyField(RelatedField): 
            # related_name with one generated from the m2m field name. Django

            # still uses backwards relations internally and we need to avoid

            # clashes between multiple m2m fields with related_name == '+'.

            self.rel.related_name = "_%s_+" % name

            self.rel.related_name = "_%s_%s_+" % (cls.__name__.lower(), name)



        super(ManyToManyField, self).contribute_to_class(cls, name, **kwargs)

docs/releases/1.8.6.txt

+4 −0
Original line number Diff line number Diff line
@@ -17,3 +17,7 @@ Bugfixes 


* Fixed system check crash on ``ForeignKey`` to abstract model

  (:ticket:`25503`).



* Fixed incorrect queries when you have multiple ``ManyToManyField``\s on

  different models that have the same field name, point to the same model, and

  have their reverse relations disabled (:ticket:`25545`).

tests/many_to_many/models.py

+17 −0
Original line number Diff line number Diff line
@@ -35,3 +35,20 @@ class Article(models.Model): 


    class Meta:

        ordering = ('headline',)





# Models to test correct related_name inheritance

class AbstractArticle(models.Model):

    class Meta:

        abstract = True

        ordering = ('title',)



    publications = models.ManyToManyField(Publication, name='publications', related_name='+')





class InheritedArticleA(AbstractArticle):

    pass





class InheritedArticleB(AbstractArticle):

    pass

tests/many_to_many/tests.py

+26 −1
Original line number Diff line number Diff line
@@ -4,7 +4,7 @@ from django.db import transaction 
from django.test import TestCase

from django.utils import six



from .models import Article, Publication

from .models import Article, InheritedArticleA, InheritedArticleB, Publication





class ManyToManyTests(TestCase):
@@ -415,3 +415,28 @@ class ManyToManyTests(TestCase): 
        self.assertQuerysetEqual(self.a4.publications.all(), [])

        self.assertQuerysetEqual(self.p2.article_set.all(),

                                 ['<Article: NASA finds intelligent life on Earth>'])



    def test_inherited_models_selects(self):

        """

        #24156 - Objects from child models where the parent's m2m field uses

        related_name='+' should be retrieved correctly.

        """

        a = InheritedArticleA.objects.create()

        b = InheritedArticleB.objects.create()

        a.publications.add(self.p1, self.p2)

        self.assertQuerysetEqual(a.publications.all(),

            [

                '<Publication: Science News>',

                '<Publication: The Python Journal>',

            ])

        self.assertQuerysetEqual(b.publications.all(), [])

        b.publications.add(self.p3)

        self.assertQuerysetEqual(a.publications.all(),

            [

                '<Publication: Science News>',

                '<Publication: The Python Journal>',

            ])

        self.assertQuerysetEqual(b.publications.all(),

            [

                '<Publication: Science Weekly>',

            ])

tests/model_meta/results.py

+10 −10
Original line number Diff line number Diff line
@@ -319,7 +319,7 @@ TEST_RESULTS = { 
    'get_all_related_objects_with_model_hidden_local': {

        Person: (

            ('+', None),

            ('_people_hidden_+', None),

            ('_relating_people_hidden_+', None),

            ('Person_following_inherited+', None),

            ('Person_following_inherited+', None),

            ('Person_friends_inherited+', None),
@@ -334,7 +334,7 @@ TEST_RESULTS = { 
        ),

        BasePerson: (

            ('+', None),

            ('_basepeople_hidden_+', None),

            ('_relating_basepeople_hidden_+', None),

            ('BasePerson_following_abstract+', None),

            ('BasePerson_following_abstract+', None),

            ('BasePerson_following_base+', None),
@@ -382,8 +382,8 @@ TEST_RESULTS = { 
        Person: (

            ('+', BasePerson),

            ('+', None),

            ('_basepeople_hidden_+', BasePerson),

            ('_people_hidden_+', None),

            ('_relating_basepeople_hidden_+', BasePerson),

            ('_relating_people_hidden_+', None),

            ('BasePerson_following_abstract+', BasePerson),

            ('BasePerson_following_abstract+', BasePerson),

            ('BasePerson_following_base+', BasePerson),
@@ -416,7 +416,7 @@ TEST_RESULTS = { 
        ),

        BasePerson: (

            ('+', None),

            ('_basepeople_hidden_+', None),

            ('_relating_basepeople_hidden_+', None),

            ('BasePerson_following_abstract+', None),

            ('BasePerson_following_abstract+', None),

            ('BasePerson_following_base+', None),
@@ -730,7 +730,7 @@ TEST_RESULTS = { 
            ('friends_base_rel_+', None),

            ('followers_base', None),

            ('relating_basepeople', None),

            ('_basepeople_hidden_+', None),

            ('_relating_basepeople_hidden_+', None),

        ),

        Person: (

            ('friends_abstract_rel_+', BasePerson),
@@ -738,11 +738,11 @@ TEST_RESULTS = { 
            ('friends_base_rel_+', BasePerson),

            ('followers_base', BasePerson),

            ('relating_basepeople', BasePerson),

            ('_basepeople_hidden_+', BasePerson),

            ('_relating_basepeople_hidden_+', BasePerson),

            ('friends_inherited_rel_+', None),

            ('followers_concrete', None),

            ('relating_people', None),

            ('_people_hidden_+', None),

            ('_relating_people_hidden_+', None),

        ),

        Relation: (

            ('m2m_abstract_rel', None),
@@ -757,13 +757,13 @@ TEST_RESULTS = { 
            'friends_base_rel_+',

            'followers_base',

            'relating_basepeople',

            '_basepeople_hidden_+',

            '_relating_basepeople_hidden_+',

        ],

        Person: [

            'friends_inherited_rel_+',

            'followers_concrete',

            'relating_people',

            '_people_hidden_+',

            '_relating_people_hidden_+',

        ],

        Relation: [

            'm2m_abstract_rel',