config-database.js

'use strict';

var pg = require('pg');
var db = 'notconn';

exports = module.exports = function(settings) {
	db = new pg.Client(settings.database.connection.string);
	db.connect(function(err, db, done) {
		if(err) {
			/*
			server.log('error', 'Database connection ' + err);
			Static.ShutdownProcedure();
			*/
			console.log(configurations);
			console.log('Database connection ' + err);
            db = 'notconn';
		}else{
			console.log('Successfully connected to database.');
		}
	});
    return db;
}

exports['@singleton'] = true;
exports['@require'] = [ 'config/settings' ];

controllers-uploadHandler.js

//// controllers/uploadHandler.js
// Look at this file first.

'use strict';

var response, domain;

function uploadHandler(request, reply) {
  domain = request.params.domain;
  if(!response.res){
    Boom.badRequest(response);
  }else{
    reply(response);
  }
}

exports = module.exports = function(p) { // p is undefined althrough I @require'd 'models/Procedures'
  p.checkExistComputer(domain, function (err, exists) { //error
    //...
  });
  return uploadHandler;
};

exports['@singleton'] = true;
exports['@require'] = ['models/Procedures'];

/*
Error thrown:

c:\projects\nodejs\api\src\controllers\uploadHandler.js:16                 
  p.checkExistComputer(domain, function (err, exists) {                                
    ^                                                                                  
TypeError: undefined is not a function                                                 
    at module.exports (c:\projects\nodejs\api\src\controllers\uploadHandler.js:16:5)                                                                              
    at Singleton.instantiate (c:\projects\nodejs\api\node_modules\electrolyte\lib\patterns\singleton.js:18:23)                                                    
    at Singleton.Component.create (c:\projects\nodejs\api\node_modules\electrolyte\lib\component.js:29:28)                                                        
    at Container.create (c:\projects\nodejs\api\node_modules\electrolyte\lib\container.js:81:15)                                                                  
    at Object.<anonymous> (c:\projects\nodejs\api\src\config\routes.js:43:22)                                                                                     
    at Module._compile (module.js:460:26)                                              
    at Object.Module._extensions..js (module.js:478:10)                                
    at Module.load (module.js:355:32)                                                  
    at Function.Module._load (module.js:310:12)                                        
    at Module.require (module.js:365:17)                                               
    at require (module.js:384:17)                                                      
    at Object.fn (c:\projects\nodejs\api\node_modules\electrolyte\lib\loaders\node.js:24:12)                                                                      
    at Container._loadModule (c:\projects\nodejs\api\node_modules\electrolyte\lib\container.js:152:18)                                                            
    at Container.create (c:\projects\nodejs\api\node_modules\electrolyte\lib\container.js:71:10)                                                                  
    at Object.<anonymous> (c:\projects\nodejs\api\server.js:27:18)         
    at Module._compile (module.js:460:26)                                              
    
*/

models-Procedures.js

//
//// models/Procedures file
//
'use strict';

//var ioc   = require('electrolyte');

var db;
//var database = ioc.create('config/database');


var Procedures = function(database){ // Is 'config/database' even passed here?
  db = database;
};

Procedures.prototype.checkExistComputer = function(lcdomain, cb) {
    /*SQL SCRIPT
    
    SELECT domain FROM computers WHERE domain = 'test';
  
  */
  if(db == 'notconn'){return cb(true, false, "No database connection.");}

    var sql = "SELECT domain FROM computers WHERE domain = '" + lcdomain + "';";
    console.log(db);
    var query = db.query(sql);
    
    query.on("error", function (err) {
        var comm = "<< [2] Database select " + err;
        cb(true, false, comm);
    });
    
    query.on("row", function (row, result) { 
        result.addRow(row);
    });

    query.on('end', function (result) {
        if (result.rows.length > 0) {
            cb(false, true);
        }else{
            cb(false, false);
        }
    });
};

exports = module.exports = Procedures;

exports['@literal'] = true;
exports['@require'] = ['config/database'];