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Posted: **Tue Apr 08, 2014 4:09 am**

Okay so I have been racking my brain on this and I know I missing something simple. I am not using Mongoose or anything else other than mongojs.

All I want to do is hold my DB code outside of the app.js folder so i am using export

so in app.js

Code: Select all

var app = require('http').createServer(handler)
  , io = require('socket.io').listen(app)
  , fs = require('fs')
  , PlayerDB = require('./functions/server/PlayerDB')

 var databaseUrl = "chatarena"; 
var collections = ["Players"]
var db = require("mongojs").connect(databaseUrl, collections);
var Player = new PlayerDB();
console.log(Player.checkUser(db,"Halls"));

and in PlayerDB.js

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var PlayerDB = function (){  
   var self = this;
   self.checkUser = function (db,Name)
   {
		db.Players.find({Name: Name}, function(err, Players) 
		{
		  if( err || !Players) return "No Players by that name";
		  else Players.forEach( function(Player) {
			return Player.Strength;
		  } );
		});
   };
   
};

module.exports = PlayerDB;

Basically this will not work as returning a function gives the entire object. It is a function inside of a function so scope will not allow me to set a variable to pass back. What the heck am i doing wrong here? How is it done normally to use MongoDB inside of Nodejs and yet hold the code outside of the app.js?

Posted: **Tue Apr 08, 2014 2:37 pm**

OMG ^&(&*%$ I finally figured it out. That was hours of racking my brain for such a simple solution. It was all in call backs

Code: Select all

Player.checkUser(db,"Halls", function(result) {
  console.log(result);
});

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 self.checkUser = function (db,Name,callback)
   {
		db.Players.find({Name: Name}, function(err, Players) 
		{
		  if( err || !Players) console.log(0);
		  else Players.forEach( function(Player) {
			var Test = Player.Strength;
			callback(Test);
		  } );
		});
		
   };

};

Posted: **Tue Apr 08, 2014 4:40 pm**

Yep, that is that "volleying" pattern I mentioned in that other thread. It is really a huge piece of dealing with async code, but once you get the hand of it, a lot of stuff falls into place

Posted: **Tue Apr 08, 2014 4:54 pm**

yeah it is definitely one of those things that has to "click".

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