无法通过mongoose

Question

我知道这听起来像是重复再次问这个问题，我这样做的原因是我已经尝试了这里给出的所有答案，但直到现在我仍然没有解决方案。我不知道这里显示的代码有什么问题。提前谢谢！

var Product = require("../models/product");

var mongoose = require("mongoose");
mongoose.connect("localhost:27017/shopping");

var db = mongoose.connection;


    db
      .on("error", function (err) {
        console.log("Connection Error!!! this's some prompts: ");
        console.log(err);
    })
      .once("open", function () {
        console.log("Open DataBase Successfully!!!");
    });


var products = [
            new Product({
                imagePath: 'https://upload.wikimedia.org/wikipedia/en/5/5e/Gothiccover.png',
                title: 'Gothic Video Game',
                description: 'Awesome Game!!!!!!',
                price: 10
            }),
            new Product({
                imagePath: 'http://cdn.addictinggames.com/newGames/game-links/must-a-mine-dupe-links/must-a-mine-dupe-links.png?c=17',
                title: 'Must a Mine',
                description: 'blablablabalbla lballdoi dfjflsjoid',
                price: 13
            }),
            new Product({
                imagePath: 'http://www.desktopwallpaperhd.net/wallpapers/8/7/halo-reach-wallpaper-background-desktop-games-title-81671.jpg',
                title: 'Halo reach, evolved, art, noble',
                description: 'Awesome Game!!!!!!',
                price: 20
            }),
            new Product({
                imagePath: 'http://www.qqxxzx.com/image-html.php?pic=/images/games-images/games-images-14.jpg',
                title: 'Girls on the Street',
                description: 'ldode doe odeedd lballdoi dfjflsjoid',
                price: 43
            }),
            new Product({
                imagePath: 'http://cdn.addictinggames.com/newGames/game-links/team-drift-cats-links/team-drift-cats-links.png?c=17',
                title: 'Team Drifts Card lives',
                description: 'magnifull Game!!!!!!',
                price: 22
            }),
            new Product({
                imagePath: 'https://lh3.ggpht.com/OoYWDD31U4GypmhoLAHAy7g9QfENitgoTGcFCC55jRS9wNXLk4Viutp5wJLFzOjgcg=h900',
                title: 'Car Race by Fun',
                description: 'dlfjdl gofioreo godiee joid',
                price: 18
            })
];

var done= 0;
for (var i = 0; i < products.length; i++) {
    products[i].save(function(err, result){
        done++;
        if(done === products.length)
            exit();
    });
}

function exit(){
    mongoose.disconnect();
}

以下是型号代码：

var mongoose = require("mongoose");
var Schema = mongoose.Schema;

var schema = new Schema({
  imagePath: {type: String, required: true},
  title: {type: String, required: true},
  description: {type: String, required: true},
  price: {type: Number, required: true}
});

module.exports = mongoose.model("Product", schema);