无法访问自定义Node.js模块中的变量

Question

I am trying to have a module contain the information for different roles for a game but whenever I try and receive the data from the variables I create, it comes as undefined and/or I get errors saying something similar to saying the variable inside the data doesn't exist (such as the role's name).

I've seen a bunch of tutorials do similar but I can't seem to figure out what I've done wrong.

My index file.

var express = require('express');
var app = express();
var serv = require('http').Server(app);

var RoleList = require('./_modules/RoleList');

var Socket = function() {}
Socket.list = {};

serv.listen(process.env.PORT || 4567);
console.log("Server started.");

var io = require('socket.io')(serv, {});
io.sockets.on('connection', function(socket) {
    socket.id = Math.random();
    Socket.list[socket.id] = socket;
    console.log('Player Connected');

    console.log('Role Name: ' + RoleList.testRole.roleName);

    socket.on('disconnect', function() {
        delete Socket.list[socket.id];
        console.log('Player Disconnected');
    });
});

RoleList Module

var Role = function() {
  var self = {};
  var roleName = 'TestingRoleName';
  return self;
}

modules.exports = {
  roleTest: Role
}

But upon running the server I get the results.

Server started.
Player Connected
T:undefined

instead of

T:TestingRoleName

Is anyone able to help with this? I'd appreciate that so much :DI am likely doing something completely wrong but I can't seem to find an answer anywhere.

Answer 1

This i because Role is a function not Object . You need to call function to return self . And you should set roleName as property of self

var Role = (function() {
  var self = {};
  self.roleName = 'TestingRoleName';
  return self;
})();

Or you can change Role to this.This is the way I recommend

var Role = {
  roleName:'TestingRoleName'
}