Question

我的意图是在博客应用程序中获取post.likes.count。但这由于方法错误而无效。

错误：

'method object' has no attribute 'count'

这是我的代码：

app / templates / post / show.html

<div class="like">
  <i class="fas fa-caret-up"></i>
  <p>{{ post.likes.count }}</p>
</div>

app / models.py

class Post(db.Model):
    id = db.Column(db.Integer, primary_key=True)

    title = db.Column(db.String)
    content = db.Column(db.Text)

    def likes(self):
        likes = db.session.query(PostLike).filter(PostLike.issue_id == self.id)
        return likes

class PostLike(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    user_id = db.Column(db.Integer,db.ForeignKey('users.id'))
    post_id = db.Column(db.Integer,db.ForeignKey('posts.id'))
    user = db.relationship("User", backref='user_post_like', foreign_keys=[user_id])
    post = db.relationship("Post", backref='post_user_like', foreign_keys=[post_id])

    def __repr__(self):
        return '<PostLike %r>'

发布喜欢的结果：

(Pdb) post.likes
<bound method Post.likes of <Post 'xxxxxxxx'>

Answer 1

来自：

<div class="like">
  <i class="fas fa-caret-up"></i>
  <p>{{ post.likes.count }}</p>
</div>

收件人：

<div class="like">
  <i class="fas fa-caret-up"></i>
  <p>{{ post.likes().count() }}</p>
</div>

无法使用Python中的SQLAlchemy获取喜欢的帖子

1 个答案: