Question

我正在编写一个 Discord.js 机器人来连接到网站并充当门户。我写了一个叫做 getUser 的函数，用于所有其他函数，当它被调用时，它从不等待。

function getUser(message) {
  let user;
  if (!data.userAcc.hasOwnProperty(message.author)) return null;
  for (let i=0;i<Object.keys(data.userAcc).length;i++) {
    if (Object.keys(data.userAcc)[i]==`<@${message.author.id}>`) {
      MongoClient.connect(config.mongoURI,{useUnifiedTopology:true},(err,db)=>{
        if (err) throw err;
        let dbo=db.db("knoldus");
        dbo.collection("users").findOne({"user.email":Object.values(data.userAcc)[i]},(err,result)=>{
          if (err) throw err;
          if (result==null||result==undefined) {
            delete data.userAcc[i]
            return 'error:no-email'
          }
          console.log(result);
          return result;
        });
      })
    }
  }
}

async function checkStatus(message) {
  let user = await getUser(message);
  console.log("user: "+user);
  if (user==null) return message.channel.send(`You are not logged in ${message.author}!`);
  if (user=='error:no-email') return message.author.send(`Cannot find the email **${Object.values(data.userAcc)[i]}** ${message.author}! The account may have been deleted.`);
  return message.channel.send(`${message.author}'s status: ${user.user.dispatchStatus} | Set by: ${user.user.dispatchStatusSetBy}`);
}

输出显示 getUser 正在工作，但调用它的函数不会等待它完成。这是输出

user: undefined
{
  my user object
}

从 getUser 打印的对象发生在主函数 getStatus 之后，没有完成 getUser

从另一个函数调用时，异步函数不返回值

0 个答案: