Question

我正在使用nodejs，并为用户创建了注册模型，但是在邮递员中运行后，没有响应或失败。我只是被困在那里，并在我的终端中得到以下响应

UnhandledPromiseRejectionWarning：未处理的承诺拒绝。这个由抛出异步函数引起的错误没有障碍，或者拒绝了没有处理的承诺使用.catch（）。（拒绝ID：1）（节点：12675）[DEP0018] DeprecationWarning：已弃用未处理的承诺拒绝。在未来，未处理的承诺拒绝将终止具有非零退出代码的Node.js进程

下面是我的模型代码

const AccountSchema = new mongoose.Schema(
    {
        fullName: {
            type: String,
            require: true,
            minlength: 2
        },
        email: {
            type: String,
            required: true,
            trim: true,
            minlength: 1,
            unique: true,
            validate: {
                validator: validator.isEmail,
                message: '{VALUE} is not a valid email'
            }
        },
        password: {
            type: String,
            require: true,
            minlength: 6
        },

        token: {
            type: String,
            required: true
        },
        timestamp: {
            type: Date,
            default: Date.now
        }

    }
);

AccountSchema.methods.toJSON = function () {
    const user = this
    const userObject = user.toObject()

    return _.pick(userObject, ['_id','fullName', 'email', 'token'])
}

AccountSchema.methods.generateAuthToken = function () {
    let user = this
    const today = new Date();
    const expirationDate = new Date(today);
    expirationDate.setDate(today.getDate() + 60);
    const token = jwt.sign({
        email: user.email,
        _id: user._id.toHexString(),
        exp: parseInt(expirationDate.getTime() / 1000, 10),
    }, 'process.env.JWT_SECRET').toString()

    user.token.push({
        token
    })

    return user.save().then(() => {
        return token
    })
}

AccountSchema.pre('save', function (next) {
    let user = this

    if (user.isModified('password')) {
        bcrypt.genSalt(10, (err, salt) => {
            bcrypt.hash(user.password, salt, (err, hash) => {
                user.password = hash
                next()
            })
        })
    } else {
        next()
    }
})

const Account = mongoose.model('Account', AccountSchema)

在我的控制器中，我有这个

缺点

t _ = require('lodash')
const {Account} = require('../models/account')

exports.register = (req, res, next) => {
    const body = _.pick(req.body, ['fullName', 'email', 'password'])
    console.log(body)
    const account = new Account(body)
    account.save().then(() => {
        return account.generateAuthToken()
    }).then((token) => {
        res.header('Authorization', token).send(account)
    }).catch((e) => {
        res.status(400).send(err)
    })
}

那我的邮递员就是这样

{
    "fullName": "Adie Olami",
    "email": "ugbe@gmail",
    "password": "123456"
}

让我也补充一点，我是Node的新手，并且仍然在学习，因此希望获得任何帮助

Answer 1

使用async/await的非常简单的解决方案：

t _ = require('lodash')
const {Account} = require('../models/account')

exports.register = async (req, res, next) => {
    const body = _.pick(req.body, ['fullName', 'email', 'password'])
    console.log(body)
    const account = new Account(body)
try {
    await account.save();
    const accessToken = await account.generateAuthToken()
    res.header('Authorization', token).send(account)
 } catch(err) {
    res.status(400).send(err)
 }
}

Answer 2

控制台告诉您您没有正确处理承诺在代码中某些时候被拒绝的情况。查看您发布的内容，我认为问题出在以下部分：


return user.save().then(() => {
        return token
    })

您没有处理对user.save（）的调用中拒绝承诺的可能性。为了解决这个问题，您需要在末尾添加一个catch块：


... user.save()
    .then(() => {
        return token
    })
    .catch((error) => {
        // Log out the error to see what is going on for debugging purposes
        console.error(error);
        // Handle the error - in this case I've added a throw() but you could perhaps just return an empty token, or whatever you need for your use case.
        throw error;
    })

希望有帮助。

使用Node Express应用程序进行帐户注册继续加载邮递员

2 个答案: