Question

我有一些递归的Django ManytoManyField在我的应用程序中使用'through属性'。这是一个例子：

class Author(models.Model):
    user = models.OneToOneField(User, parent_link=True)
    introduction = models.TextField(blank=True)
    pictures = models.ManyToManyField('Graphic', related_name='users', null=True)
    organizations = models.ManyToManyField('Organization', related_name='members')
    expertise = models.ManyToManyField('Tag', related_name='experts', null=True)
    interests = models.ManyToManyField('Tag', related_name='interested_in', null=True)
    saved_articles = models.ManyToManyField(Article, related_name='favorited_by', null=True, through='SavedArticles')
    authors_followed = models.ManyToManyField('self', related_name='authors_followed', null=True, through='FollowedAuthors', symmetrical=False)

class FollowedAuthors(models.Model):
    author = models.ForeignKey(Author)
    trustee = models.ForeignKey(Author)
    notes = models.TextField()
    tags = models.ManyToManyField('Tag')

我知道我可以访问MyAuthor.authors_followed.all（），但如果我想调用FollowedAuthor.authors_followed.all（）来返回MyAuthor，我不能只使用related_name ='authors_followed'吗？这只会否定对称=错误的行为吗？

提出了类似的问题here，但在这种情况下他们有：

recursive_field = models.ManyToManyField('self', through='ThroughTable', related_name='different_field').

我是否错过了对symmetrical和related_name如何工作的一些理解？

Answer 1

如果我理解正确，我认为你应该有：

authors_followed = models.ManytoManyField('self', related_name='following_authors', null=True, through='FollowedAuthors', symmetrical=False)

那样，

MyAuthor.following_authors.all()

将返回关注MyAuthor的作者，

MyAuthor.author_followed.all()

将返回MyAuthor正在关注的作者。

使用您的配置，Django无法发挥作用并确定您想要的方向。

对于Django递归ManytoManyFields，related_name可以覆盖symmetrical = False吗？

1 个答案: