无法查看JSON数据

我有下面的代码在app.js

 var express = require("express"); var app = express(); var port = 3001; app.get("/", (req, res) => { res.send("success"); }); app.listen(port, () => { console.log("Server listening on port " + port); }); var mongoose = require('mongoose'); mongoose.createConnection('mongodb://localhost:27017/mydb'); var Schema = mongoose.Schema; var productSchema=new Schema({ created_at: String, id: Number }); const Products = mongoose.model("myc",productSchema); app.get('/',function(req,res){ Products.find({},function(err,products){ res.json(products) }); }) // module.exports = app; 

我创build了mongodb数据库mydb和myc作为内容文件的集合。

当我inputlocalhost：3000，我没有看到存储在Mongodb中的JSON数据只显示空白页面。 请帮忙

Answer 1

 var express = require("express"); var app = express(); var port = 3001; var mongoose = require('mongoose'); mongoose.createConnection('mongodb://localhost/mydb'); var Schema = mongoose.Schema; var productSchema=new Schema({ created_at: String, id: Number }); const Products = mongoose.model("myc",productSchema); app.get('/',function(req,res){ Products.find({},function(err,products){ if(!err){ res.json(products) } else{ res.send(err) } }); }) app.listen(port, () => { console.log("Server listening on port " + port); }); module.exports = app;