未處理的承諾拒絕（拒絕ID：1） - Node.js

Question

我是Node.js的新手，試圖找出一些問題。 我在Node.js服務器上爲在MongoDB上寫入用戶信息的Android應用程序定義了註冊函數。

server.js

var express = require('express'), 
    app = express(), 
    port = process.env.PORT || 3000, 
    mongoose = require('mongoose'), 
    Task = require('./api/models/serverModel'), 
    bodyParser = require('body-parser'); 

var url = "mongodb://localhost:27017/ProjectDB"; 
mongoose.Promise = global.Promise; 
mongoose.connect(url); 

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

var routes = require('./api/routes/serverRoute'); 
routes(app); 

app.listen(port); 
console.log('Project RESTful API server started on: ' + port); 

serverModel

var UserSchema = new mongoose.Schema({ 
    userName: {type: String, unique: true, required: true}, 
    email: {type: String, unique: true, required: true}, 
    password: {type: String, required: true}, 
    createdAt: {type: String, required: true} 
}); 
var User = mongoose.model('User', UserSchema); 

module.exports =用戶;

serverRoute

module.exports = function(app) { 
    var Project = require('../controllers/serverController'); 

    // Project Routes 
    app.route('/signup') 
     .post(Project.signup); 
}; 

serverController

... 
mongoose.Promise = global.Promise; 
exports.signup = function(req, res) { 

return new Promise(function(resolve,reject) { 

    var user = new User({ 
     userName: req.body.name, 
     password: req.body.pass, 
     mail: req.body.email, 
     createdAt : new Date() 
    }); 

user.save() 
    .then(function() { resolve({ status: 201, message: 'User Registered Successfully !' })}) 
    .catch(function(err) { 
     if (err.code == 11000) { 
      reject({ status: 409, message: 'User Already Registered !' }); 
     } else { 
      reject({ status: 500, message: 'Internal Server Error !' }); 
     } 
    }); 

})}; 

... 

它編譯沒有任何錯誤。 當我嘗試通過郵差送一個JSON這樣的：

{ 
    "userName" : "username", 
    "email" : "user.name@gmail.com", 
    "password" : "blabla1" 
} 

它報告

UnhandledPromiseRejectionWarning：未處理的承諾拒絕（拒絕ID：1）目標對象]

我已經讀過大量的帖子，但我無法擺脫這一點。 有什麼幫助嗎？ 謝謝。

Answer 1

試試這個並恢復。

server.js

var express = require('express'), 
app = express(), 
port = process.env.PORT || 3000, 
mongoose = require('mongoose'), 
Task = require('./api/models/serverModel'), 
bodyParser = require('body-parser'); 

var url = "mongodb://localhost:27017/ProjectDB"; 
mongoose.Promise = global.Promise; 
mongoose.connect(url); 

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

var routes = require('./api/routes/serverRoute'); 
//change 
//routes(app); 
app.use('/',routes); 

app.listen(port); 
console.log('Project RESTful API server started on: ' + port); 

serverRoute

var express = require('express'); 
var router = express.Router(); 

// GET home page. 
router.post('/signup', function(req, res, next) { 
    var Project = require('../controllers/serverController'); 
    Project.signup().then(function(result){ 
    res.send(result); 
    }).catch(function(err){ 
     res.send(err); 
    }); 
}); 

module.exports = router;