Extending Backbone Model with methods and use them to initialise Alloy Models

alloy.js

Backbone.Model.prototype.generateUniqueId = function(prefix, empNo) {
	try {
		var timestamp = moment.utc().format("MMDDYYHHmmss");
		var randomNumber = (Math.floor(((Math.random() * 10000) + 1)));
		randomNumber = (randomNumber < 1000) ? randomNumber + 1000 : randomNumber;

		var genId = prefix + "-" + empNo + "-" + timestamp + "-" + randomNumber;
		Ti.API.log('BBModel', "AppGenUniqueId: " + genId);
		return genId;

	} catch(err) {
		Ti.API.log('BBModel', "Error generating unique Id "+ prefix +" for " + empNo);
		return "";
	}
};

FinanceAgreement.js

exports.definition = {
	config : {
		columns : {
			"Id" : "INTEGER PRIMARY KEY AUTOINCREMENT",
			"AppGenFinAgrId" : "TEXT",
			"InspectionId" : "TEXT",
			//....
		},
		adapter : {
			type : "sql",
			collection_name : "FinanceAgreement",
			idAttribute: "Id"
		}
	},
	extendModel : function(Model) {
		_.extend(Model.prototype, {
			// extended functions and properties go here
			initialize : function() {
				this.set('AppGenFinAgrId', this.generateUniqueId("F", configuration.login.employeeNumber));
			}});
		return Model;
	},

FinanceManager.js

var finAgmt = Alloy.createModel('FinanceAgreement', {});
Ti.API.log('FinMgr',JSON.stringify(finAgmt));
/*
Outputs:
[INFO] :   [FINMGR] {"AppGenFinAgrId":"F-13703-032116210645-5700"}

*/