我正在学习 mongoose，我正在发出一个简单的发布请求以将用户添加到我的 mongolab 测试数据库中。我使用的是基本用户模式，但是当我运行 save() 方法时，我有时会得到一个

Unhandled promise rejection (rejection id: 1): Error: data and salt arguments required

有时什么也没有发生，应用程序什么也不做。我正在使用 Postman 来测试发布请求。

编辑:正如 mikey 所建议的，我删除了 Resolve 和 Reject 回调并处理了 .save() 回调中的所有内容，但现在我收到以下错误:

(node:10964) DeprecationWarning: Mongoose: mpromise (mongoose's default promise library) is deprecated, plug in your own promise library instead: http:// mongoosejs.com/docs/promises.html

var express = require('express');
var morgan = require('morgan');
var mongoose = require('mongoose');
var bodyParser = require("body-parser");

var mPromise = require("mpromise");

var User = require('./models/user');

var app = express();


mongoose.connect('mongodb://root2:1234@ds161742.mlab.com:61742/ecommerce', function (err) {
    if (err) console.log(err);

    console.log("Connected to the database");
});

app.use(morgan('dev'));

app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true }));

app.post("/create-user", function (req, res, next) {

    var user = new User();

    user.profile.name = req.body.name;
    user.password = req.body.password;
    user.email = req.body.email;

    user.save(function (err, user) {
        if (err) {
            res.send("deu erro");
        } else {
            console.log("Deu bom");
            res.send("deu bom");
        }
    })
})


app.get("/get-users", function (req, res, next) {
    User.find({})
        .exec(function (err, users) {
            if (err) res.send("Erro na hora de pegar os usuarios " + err);
            res.send(users);
        });
});



app.get('/', function (req, res) {
    res.send("Deu mais bom");
});



app.listen(80, function (err) {
    if (err) throw err;
    console.log("Server is running on port 80");
});

此外，当我连接到 mongolab 时，我收到警告:

DeprecationWarning: open() is deprecated in mongoose >= 4.11.0, use openUri() instead, or set the useMongoClient option if using conn ect() or createConnection(). See http://mongoosejs.com/docs/connections.html#use-mongo-client Server is running on port 80 Db.prototype.authenticate method will no longer be available in the next major release 3.x as MongoDB 3.6 will only allow auth against users in the admin db and will no longer allow multiple credentials on a socket. Please authenticate using MongoClient.connect with auth credentials.

但我没有在我的代码中使用任何 open() 方法，因为我没有使用默认的 mongoDB 库。我能够将一个集合添加到 mongolab 数据库，但数据不完整，现在我正在为此苦苦挣扎。

Edit2:这是我使用 bcrypt 的 UserSchema 的代码:

var mongoose = require('mongoose');
var bcrypt = require('bcrypt');
var Schema = mongoose.Schema;

/* The user schema attributes/fields */
var UserSchema = new Schema ({
    email : String,
    password: String,




    profile: {
        name: {type: String, default: "Sem nome"},
        picture: {type: String, default: ''}
    },

    address: String,
    history: [{
        date: Date,
        paid: {type: Number, default: 0},
        //item: { type: Schema.Types.ObjectId, ref: ''}
    }]
});

/* The method to hash the password before saving it to the database */

UserSchema.pre('save', function(next){
    var user = this;
    if(!user.isModified('password')) return next();

    bcrypt.genSalt(10, function(err, salt){
        if(err) return next(err);

        bcrypt.hash(user.password, salt, null, function(err, hash){
            if(err) return next(err);
            user.password = hash;
            next();
        });
    });
});


/* Compare the password between the database and the input from the user */

UserSchema.methods.comparePasswords = function(inputpassword){
    return bcrypt.compareSync(inputpassword, this.password);
}


module.exports = mongoose.model('User', UserSchema);

感谢任何帮助，谢谢

最佳答案

要解决关于 mpromise 的第一个警告，您可以通过执行以下操作使用 native Promise( Node 版本 >= 6):

mongoose.Promise = global.Promise;

要解决第二个警告，您必须使用 useMongoClient 和 documentation建议采用 promise 方法:

function connectDatabase(databaseUri) {
    var promise = mongoose.connect(databaseUri, {
        useMongoClient: true,
    });

    return promise;
}

connectDatabase('mongodb://root2:1234@ds161742.mlab.com:61742/ecommerce')
  .then(() => console.log("Connected to the database");)
  .catch((err) => console.log(err));

关于node.js - mongoose.save() 有两种类型的行为，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/45151589/