node和mongoDB的问题

Question

events.js:85

      throw er; // Unhandled 'error' event

            ^

Error: connection closed

    at null.<anonymous> (/Users/yuman/Documents/htdocs/Demo/mean/node_modules/mongoose/node_modules/mongodb/lib/mongodb/connection/server.js:608:24)

    at emit (events.js:104:17)

    at null.<anonymous> (/Users/yuman/Documents/htdocs/Demo/mean/node_modules/mongoose/node_modules/mongodb/lib/mongodb/connection/connection_pool.js:171:15)

    at emit (events.js:110:17)

    at Socket.<anonymous> (/Users/yuman/Documents/htdocs/Demo/mean/node_modules/mongoose/node_modules/mongodb/lib/mongodb/connection/connection.js:550:12)

    at Socket.emit (events.js:107:17)

    at TCP.close (net.js:485:12)

源代码是MEAN web 开发一书里的，

上面贴出来的的是报错

有遇到过的请指导

Answer 1

你是不是没开mongodb的服务。