Question

// Password match var
var checkPassword = null;

// Find user by email
const auth = await Auth.findOne({ userEmail }, { userLoginInfo: 0 });

// If user does not exist
if (auth === null) {
  return res
    .status(400)
    .json({ authFailedMessage: 'Email or password is incorrect' });
} else if (auth !== null) {
  // Check password when user exists
  const returnVal = await checkPasswordService.matchPassword(
    password,
    auth.password 
  ).then((returnVal) => {
    console.log(returnVal) ----> undefined
    returnVal = checkPassword
  }
  )
}

这是我的主要功能。我想将“ checkPassword”设置为“ checkPasswordService”的返回值。而且，这是我的“ checkPassowrdService”。

class checkPasswordService { 
    static async matchPassword(passwordInput, passwordDB) {
        console.log('passint', passwordInput)
        console.log('passDB', passwordDB)
       await bcrypt.compare(passwordInput, passwordDB).then((isMatch) => {
           if(isMatch) {
               console.log('matttched!') -------->returning 'mattched!'
               return true
           } else {
               return false
           }
       })
    }
}

我看到了“ matttched1”的console.log。但是，在主要功能中，console.log（returnVal）是'undefined'。如何从checkPasswordService获取'true'或'false'的值？

Answer 1

您在return中没有matchPassword()

返回bycrypt承诺

return bcrypt.compare(passwordInput, passwordDB).then((isMatch) => {..

Answer 2

您的代码有问题。您既在“等待”承诺checkPassowrdService，也在结尾使用.then()。两者都有相同的目的。

我建议您在末尾删除.then()并改用以下代码：

const returnVal = await checkPasswordService.matchPassword(password, auth.password)
    returnVal = checkPassword

在if（）函数中承诺在Javascript中返回未定义

2 个答案: