我试图添加新的键值到mysql结果对象，但它现在工作如何修复它？
我正在尝试从post数据库获取所有post，并检查post_likes表中的post是否为like，如果为like，则在post请求对象中添加{isLike：true}，否则为false

const fetchPost = (req, res, next) => {
  const sql = "SELECT account.name,account.username,post.content,post.likes, post.visibility,post.date,post.time, post.profile, post.id FROM post INNER JOIN account ON account.uid = post.user_id WHERE post.visibility = 'Friends' OR post.visibility = 'Public'";
  // const sql = "SELECT * FROM post";
  connectDB.query(sql, (err, post_result) => {
    if (err) {
      console.log(err);
      return next(createCustomError(err, 400));
    }
    const get_uid_query = `SELECT id FROM account where uid = '${req.user['uid']}'`;

    // get the id of user by uid
    connectDB.query(get_uid_query, (err, user_id_result) => {
      if (err) throw err;
      const id = (user_id_result[0]['id']);

      for (let i = 0; i < post_result.length; i++) {
        const sql = `SELECT user_id, post_id FROM post_likes WHERE post_id = ${post_result[i]['id']} AND user_id = ${id}`;
        connectDB.query(sql, (err, result) => {
          if (err) throw err;
          else if (result.length > 0) {
            post_result[i]['isliked'] = true;

          } else {
            post_result[i]['isLiked'] = false;  
          }
        })
      }
      res.status(200).json(post_result); // isLiked value not sending with the response how to fix it 
    })
  })
}