尝试在异步函数中使用bcrypt散列密码 [英] Trying to hash a password using bcrypt inside an async function

问题描述

继续这个问题。

我觉得我几乎就在那里，但我对异步的不完全理解阻止了我解决这个问题。我基本上试图使用bcrypt来散列密码并决定分离hashPassword函数，以便我可以在应用程序的其他部分使用它。

I feel like I'm almost there, but my incomplete understanding of async is preventing me from solving this. I'm basically trying to just hash a password using bcrypt and have decided to seperate out the hashPassword function so that I can potentially use it in other parts of the app.

hashedPassword 保持返回未定义但是...

hashedPassword keeps returning undefined though...

userSchema.pre('save', async function (next) {

  let user = this
  const password = user.password;

  const hashedPassword = await hashPassword(user);
  user.password = hashedPassword

  next()

})

async function hashPassword (user) {

  const password = user.password
  const saltRounds = 10;

  const hashedPassword = await bcrypt.hash(password, saltRounds, function(err, hash) {

    if (err) {
      return err;
    }

    return hash

  });

  return hashedPassword

}

推荐答案

await dosent等待 bcrypt.hash 因为 bcrypt.hash 不是
返回一个承诺。使用以下方法，在承诺中包装 bcrypt ，以便使用 await 。

await dosent wait for bcrypt.hash because bcrypt.hash does not return a promise. Use the following method, which wraps bcrypt in a promise in order to use await.

async function hashPassword (user) {

  const password = user.password
  const saltRounds = 10;

  const hashedPassword = await new Promise((resolve, reject) => {
    bcrypt.hash(password, saltRounds, function(err, hash) {
      if (err) reject(err)
      resolve(hash)
    });
  })

  return hashedPassword
}

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