貓鼬不保存數據

Question

我是新手，現在正在學習教程。 我目前正在播種。 我的問題是，當我在終端中運行此命令node product-seeder.js時，即使數據庫也沒有創建數據。 我的數據庫尚不存在，但我讀到如果保存數據，它將創建。 首先，我Mongoose mpromise is deprecated的錯誤，所以我把mongoose.Promise = global.Promise; 每當我的文件需要mongoose 。

這是我的app.js：

 var express = require('express'); var path = require('path'); var favicon = require('serve-favicon'); var logger = require('morgan'); var cookieParser = require('cookie-parser'); var bodyParser = require('body-parser'); var mongoose = require('mongoose'); var index = require('./routes/index'); var app = express(); //connect to mongose mongoose.Promise = global.Promise; mongoose.connect('localhost:27017/shopping-cart'); // view engine setup app.set('views', path.join(__dirname, 'views')); app.set('view engine', 'ejs'); // uncomment after placing your favicon in /public //app.use(favicon(path.join(__dirname, 'public', 'favicon.ico'))); app.use(logger('dev')); app.use(bodyParser.json()); app.use(bodyParser.urlencoded({ extended: false })); app.use(cookieParser()); app.use(express.static(path.join(__dirname, 'public'))); app.use('/', index); // catch 404 and forward to error handler app.use(function(req, res, next) { var err = new Error('Not Found'); err.status = 404; next(err); }); // error handler app.use(function(err, req, res, next) { // set locals, only providing error in development res.locals.message = err.message; res.locals.error = req.app.get('env') === 'development' ? err : {}; // render the error page res.status(err.status || 500); res.render('error'); }); module.exports = app; 

我的產品模式在models/product.js

 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); 

最后，我的產品播種機在seeder目錄中：

 var Product = require('../models/product'); var mongoose = require('mongoose'); mongoose.Promise = global.Promise; var products = [ new Product({ imagePath: 'http://www.laptopmag.com/images/uploads/4989/g/apple-macbook-pro-13-2016-nw-g02.jpg', title: 'MacBook Pro 2016', description: 'Should we really call this a pro?', price: 1299 }), new Product({ imagePath: 'https://ss7.vzw.com/is/image/VerizonWireless/pdp-feature4-d-iphone7-bn-v2?&scl=1&bgc=ffffff&scl=1&scl=2', title: 'iPhone 7 Plus', description: 'iPhone with no headphone jack. Lmao', price: 899 }), new Product({ imagePath: 'https://www.extremetech.com/wp-content/uploads/2014/02/nokia-x-range.jpg', title: 'Nokia X', description: 'Failed Nokia Normandy project', price: 99 }), new Product({ imagePath: 'http://cdn2.gsmarena.com/vv/pics/nokia/nokia-n9-all-1.jpg', title: 'Nokia N9', description: 'Dead on arrival Meego OS powered smartphone', price: 56 }), new Product({ imagePath: 'https://store.storeimages.cdn-apple.com/4974/as-images.apple.com/is/image/AppleInc/aos/published/images/m/ac/macbook/air/macbook-air-gallery2-2014?wid=1292&hei=766&fmt=jpeg&qlt=95&op_sharpen=0&resMode=bicub&op_usm=0.5,0.5,0,0&iccEmbed=0&layer=comp&.v=1476297407703', title: 'MacBook Air', description: 'Most portable notebook from Apple', price: 999 }) ]; var done = 0; for(var i=0; i < products.length; i++) { var saved = products[i].save(); saved.then(function(err, result) { if(err) { console.log(err); } else { done++; if(done === products.length) exit(); } }); } function exit() { mongoose.disconnect(); console.log("Product seeding done!"); } 

請告訴我我做錯了

Answer 1

您缺少product-seeder.js文件中通過mongoose與mongodb的連接

var Product = require('../models/product');
var mongoose = require('mongoose');
mongoose.Promise = global.Promise;
//add this
mongoose.connect('localhost:27017/shopping-cart');

添加上面的connect語句應該可以解決問題。