Question

当我发出localhost：8000 / api / customers时，即使我在mongodb中插入数据，我也会得到空数组。我测试了路由localhost：8000 / api / customers而没有连接到mongodb，它显示一个静态文本。但是，当连接到Mongodb时，它返回空数组。这是代码

var express = require('express'),
mongoose = require('mongoose'),
bodyParser = require('body-parser');
mongoose.connect('mongodb://localhost/test');

var db = mongoose.connection;
db.on('error', console.error.bind(console, 'connection err'));
db.once('open', function callback(){console.log('connected to db')});
var Customer = require('./Customers/models/customerModel');
var app = express(),
port = process.env.PORT || 3000,
customerRouter = express.Router();

app.use(bodyParser.urlencoded({extended:true}));
app.use(bodyParser.json());
customerRouter.route('/Customers')
  .post(function(req, res){
    var customer = new Customer(req.body);
    console.log(customer);
    res.send(customer);
  })
  .get(function(req,res){
    Customer.find(function(err,customers){
        if(err)
            res.status(500).send(err);
        else {
            res.json(customers);
            console.log(customers);
        }
    });
  });
app.use('/api', customerRouter);
app.get('/', function (req, res) {
    res.send('Welcome to my API')
});
app.listen(port, function () {
    console.log('Running on port ' + port);
});

和customerModel.js

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

var customerModel = new Schema({
    name: {type: String},
    contact: {type: String},
    date_register: {type: String},
    main_tel: {type: String},
    tel_1: {type: String},
    tel_2: {type: String},
    tel_3: {type: String},
    address: {type: String},
    email: {type: String}
});

module.exports = mongoose.model('Customer', customerModel);

我在端口8000上使用gulp task runner

Answer 1

您没有正确使用Customer.find。查看文档：

http://mongoosejs.com/docs/api.html#model_Model.find

find()应该有两个参数。第一个参数是find方法的条件（如果你愿意，则为“WHERE”条件），第二个参数是回调。更新您的代码：

Customer.find(function(err,customers){ ...

到此：

Customer.find({}, function(err,customers){ ...

传递空物体意味着“给我一切”。如果您以后想要找到名为“John”的所有客户，您可以这样做：

Customer.find({firstName: "John"}, function(err,customers){ ...

Answer 2

好的我解决了，我错过了POST中的customer.save（cb（错误））。现在GET正在运作。谢谢大家

无法让Nodejs表达mongoose工作

2 个答案: