从javascript中回调数据？

Question

我想知道关于最好的方式来获得令牌变量回到高阶函数范围>>这样我就可以从高阶函数

signinUser: async (_, data) => { 
    const user = await User.findOne({'email': data.email.email}).exec(); 

    console.log(bcrypt.compare(data.email.password,user.password, (err,result)=>{ 
    if(err){return("sorry error")} 
    if(result) { 
     var token = jwt.sign({_id: user._id}, 
          config.secret, {expiresIn: 60 * 60 * 24 * 7}); 
    } 
    })) 

    return {user: {id: user._id, name: user.name, email: user.email}, token: "this is a token"} 
} 

Answer 1

如果你想留在异步的await语法返回它，您需要将bcrypt.compare调用传递给Q或BlueBird库的承诺并编写如下代码：

let result = await Q.nfcall(bcrypt.compare, data.email.password,user.password) 
if(result) { 
    var token = jwt.sign({_id: user._id}, 
         config.secret, {expiresIn: 60 * 60 * 24 * 7}); 
} 

return {id: user._id, name: user.name, email: user.email}, token: token}