如何在peewee中使用backref

Question

基本上我正在尝试编写一个索引路由，该路由返回用户订阅的最后一行的业务帖子正在为 backref (business.posts) 引发错误

# query that finds all the subscriptions of the logged in user
subscriptions_query = models.Subscription.select().join(models.User).where(models.User.id == current_user.id)
# gets the businesses being followed from the subscriptions
businesses_being_followed = [subscription.following for subscription in subscriptions_query]
post_dicts = [model_to_dict(business.posts) for business in businesses_being_followed]

这是我的帖子模型

class Post(BaseModel):
business = ForeignKeyField(Business, backref='posts')
image = CharField()
content = CharField()
date = DateTimeField(default=datetime.datetime.now)

Answer 1

你的例子是非常低效的。

你能不能这样做：

(Post
 .select()
 .join(Business)
 .join(Subscription)
 .where(Subscription.user == the_user_id))