Question

class User(models.Model):
    username = models.CharField(max_length=30)
    email = models.CharField(max_length=60, primary_key=True)
    registration_date = models.DateField(default=datetime.date.today)


class Task(models.Model):
    author = models.ForeignKey(
        User, on_delete=models.PROTECT,
        related_name="%(app_label)s_%(class)s_author"
    )
    likes = models.ManyToManyField(
        User,
        related_name="%(app_label)s_%(class)s_like"
    )
    dislikes = models.ManyToManyField(
        User,
        related_name="%(app_label)s_%(class)s_dislike"
    )
    subscribed_users = models.ManyToManyField(User)

我想为User创建一个方法，它返回该用户喜欢或不喜欢的所有任务。我查看了django orm的文档，并且没有找到我的能力，给定一个User实例，找到他喜欢的所有任务。

Answer 1

您只需要使用related_name，如：

some_user.app_label_class_like.all()

如何反向访问模型实例的ManyToManyField

1 个答案: