Question

var io = require('socket.io').listen(8888,"myIp");
var mongoose = require('mongoose');
mongoose.connect('mongodb://localhost/troll1');
var db = mongoose.connection;
io.sockets.on('connection', function (socket) {
    socket.on('registerForm', function (data) {
        db.on('error', console.error.bind(console, 'connection error:'));
        db.once('open', function callback () {
          socket.emit('registerFormConfirm',{"ok":1});
        });

    });
});

好的，那个代码在我的server.js中。由于某种原因，发射不起作用，下面的代码正常工作：

var io = require('socket.io').listen(8888,"myIp");
io.sockets.on('connection', function (socket) {
    socket.on('registerForm', function (data) {
        socket.emit('registerFormConfirm',{"ok":1});

    });
});

我和其他软件包一样安装了mongoose normaly。不知道我能在终端上做些什么来检查它是否正确

Answer 1

mongoose在调用open时发出mongoose.connect事件，但您的事件侦听器设置得太晚，无法捕获该事件。

将代码修改为

var io = require('socket.io').listen(8888,"myIp");
var mongoose = require('mongoose');
var db = mongoose.connection;
io.sockets.on('connection', function (socket) {
    socket.on('registerForm', function (data) {
        db.on('error', console.error.bind(console, 'connection error:'));
        db.once('open', function callback () {
          socket.emit('registerFormConfirm',{"ok":1});
        });
        mongoose.connect('mongodb://localhost/troll1'); // connect here

    });
});

NodeJS MongoDB mongoose db.open不起作用

1 个答案: