Node.js服务器无法连接到MongooseDB
我正在尝试从Addy Osmani的书“开发Backbone.js应用程序”中运行一些示例代码。 一个练习提供了一个package.json文件，我用它做了一个npm install ，并安装了Express，Mongoose和Path。 从那里我跑了node server.js从相同的目录，它给了我这个错误：
Express server listening on port 4711 in development mode events.js:72 throw er; // Unhandled 'error' event ^ Error: failed to connect to [localhost:27017] at null.<anonymous> (C:\backbone-fundamentals\exercise-2\node_modules\mongoose\node_modules\mongodb\lib\mongodb\connection\server.js:648:74) ... at process._tickCallback (node.js:415:13)
我假设它连接到Mongoose数据库有一个问题，但作为一个业余的Node.js，Express或Mongoose，我不知道从哪里开始debugging。 我如何检查Mongoose是否正确安装？ 顺便说一句，我在Windows上。
如果你是intersted，这里是Node的整个server.js文件：
'use strict'; // Module dependencies. var application_root = __dirname, express = require( 'express' ), //Web framework path = require( 'path' ), //Utilities for dealing with file paths mongoose = require( 'mongoose' ); //MongoDB integration //Create server var app = express(); //Connect to database mongoose.connect( 'mongodb://localhost/library_database' ); //Schemas var Keywords = new mongoose.Schema({ keyword: String }); var Book = new mongoose.Schema({ title: String, author: String, releaseDate: Date, keywords: [ Keywords ] }); //Models var BookModel = mongoose.model( 'Book', Book ); // Configure server app.configure( function() { //parses request body and populates request.body app.use( express.bodyParser() ); //checks request.body for HTTP method overrides app.use( express.methodOverride() ); //perform route lookup based on url and HTTP method app.use( app.router ); //Where to serve static content app.use( express.static( path.join( application_root, 'site') ) ); //Show all errors in development app.use( express.errorHandler({ dumpExceptions: true, showStack: true })); }); // Routes app.get( '/api', function( request, response ) { response.send( 'Library API is running' ); }); //Get a list of all books app.get( '/api/books', function( request, response ) { return BookModel.find( function( err, books ) { if( !err ) { return response.send( books ); } else { return console.log( err ); } }); }); //Get a single book by id app.get( '/api/books/:id', function( request, response ) { return BookModel.findById( request.params.id, function( err, book ) { if( !err ) { return response.send( book ); } else { return console.log( err ); } }); }); //Insert a new book app.post( '/api/books', function( request, response ) { var book = new BookModel({ title: request.body.title, author: request.body.author, releaseDate: request.body.releaseDate, keywords: request.body.keywords }); book.save( function( err ) { if( !err ) { return console.log( 'created' ); } else { return console.log( err ); } }); return response.send( book ); }); //Update a book app.put( '/api/books/:id', function( request, response ) { console.log( 'Updating book ' + request.body.title ); return BookModel.findById( request.params.id, function( err, book ) { book.title = request.body.title; book.author = request.body.author; book.releaseDate = request.body.releaseDate; book.keywords = request.body.keywords; return book.save( function( err ) { if( !err ) { console.log( 'book updated' ); } else { console.log( err ); } return response.send( book ); }); }); }); //Delete a book app.delete( '/api/books/:id', function( request, response ) { console.log( 'Deleting book with id: ' + request.params.id ); return BookModel.findById( request.params.id, function( err, book ) { return book.remove( function( err ) { if( !err ) { console.log( 'Book removed' ); return response.send( '' ); } else { console.log( err ); } }); }); }); //Start server var port = 4711; app.listen( port, function() { console.log( 'Express server listening on port %d in %s mode', port, app.settings.env ); });
在上述书的第106页， 开发Backbone.js应用程序 ，它说安装MongoDB：
从mongodb.org下载并安装MongoDB。 网站上有详细的安装指南。
所以，一旦你这样做了，在使用Mongoose时，连接到数据库就不会有任何问题。
你没有安装MongoDB。