mongoose.save（）有兩種類型的行爲

Question

我在學習貓鼬，我正在發一個簡單的post請求來將用戶添加到我的mongolab測試數據庫中。我使用的是基本的用戶模式，但是當我運行save（）方法有時我得到一個

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

，有時什麼也沒有發生，應用程序只是什麼都不做。我使用Postman來測試發佈請求。

編輯：作爲MIKEY建議我刪除了決心，拒絕回調和處理.save（）回調裏面的一切，但現在我得到以下錯誤：

(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，當我連接到mongolab我得到警告：

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.

但因爲我不使用默認的MongoDB的lib我沒有用我的代碼進行任何的open（）方法郭寶宏。我能夠將一個集合添加到mongolab數據庫中，但數據不完整，現在我正在爲此苦苦掙扎。

EDIT2：這是我UserSchema的使用bcrypt代碼：

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); 

任何幫助表示讚賞，感謝

Answer 1

除非我錯了，bcrypt.hash()接受3個參數不是4。因此，它的回調可能永遠不會被解僱。

應該是簡單

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

您可能還需要檢查user.password and salt are defined。

Answer 2

要解決的第一個警告，對於mpromise，您可以使用本機Promise（節點版本> = 6）這樣做：

mongoose.Promise = global.Promise; 

解決您r第二警告，你必須使用useMongoClient和documentation提出一個承諾的方法：

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)); 

Answer 3

下面的代碼可以解決你所有的問題

var mongoose = require('mongoose'); 
    var options = { 
     useMongoClient:true 
    }; 
    var dbUrl = 'mongodb://root2:1234@ds161742.mlab.com:61742/ecommerce'; 

    mongoose.connect(dbUrl,options); 
    mongoose.Promise = global.Promise;