A Tour of Ruby On Rails

A Tour of Ruby on Rails By David Keener http://www.keenertech.com

But First, Who Am I? ,[object Object],[object Object],[object Object],David Keener I’m a technical architect and writer with over 20 years of experience. Been doing web applications Since 1997, and Rails applications since version 1.1. Technical Architect for Grab Networks, the company known for streaming the Beijing Olympics over the web and for distributing more news videos in the US than any other company except MSNBC. 1

What Is Ruby on Rails? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Rails is an open-source, full-stack MVC framework for developing web-based, database-driven applications. Rails is implemented in the Ruby programming language. 2

Open Source ,[object Object],[object Object],[object Object],[object Object],[object Object],Rails is… 3

It’s a Full-Stack Framework Rails provides an integrated full stack framework. J2EE provides similar functionality with a variety of separate frameworks / tools (each with their own learning curves). 4

MVC ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],5

Web-Based, Database-Driven… ,[object Object],[object Object],[object Object],[object Object],Rails is ideal for web applications that do CRUD operations…. (Um, this generally sort of implies a database) 6

What’s the Big Deal? ,[object Object],[object Object],[object Object],[object Object],8

One picture is worth…. Note: Graphic found on web. 9

The Goals of Rails ,[object Object],[object Object],[object Object],[object Object],To solve any problem, first define the problem clearly. Here’s what the creators of Rails set out to accomplish… 10

The Rails Philosophy ,[object Object],[object Object],[object Object],[object Object],Philosophy separates Rails from other frameworks…. 11

“ Opinionated Software” ,[object Object],[object Object],[object Object],Rails was developed by David Heinemeier Hansson in 2003 (released to the public in 2004). He and the members of the Rails Core Team had definite opinions about what makes a framework good. 12

Primary Rails Features ,[object Object],[object Object],[object Object],[object Object],[object Object],13

Migrations ,[object Object],[object Object],[object Object],[object Object],[object Object],14

An Example Migration ,[object Object],[object Object],class ChangeOperations < ActiveRecord::Migration def self.up add_column :operations, :org_id, :integer end def self.down remove_column :operations, :org_id end End 15

Code Generator (1) ,[object Object],[object Object],[object Object],[object Object]

Code Generators (2) ,[object Object],[object Object],[object Object],[object Object],[object Object],You’ll hear a lot about Scaffolding…. 17

Convention Over Configuration ,[object Object],[object Object],[object Object],/app/controllers/products_controller.rb /app/models/product.rb /app/views/products/index.html.erb (plus other CRUD views) /db/migrate/009_create_products.rb /test/unit/product_test.rb 18

Object-Relational Mapping ,[object Object],[object Object],[object Object],This is a fancy term for “how your objects are going to access the database.” 19

Example Model ,[object Object],[object Object],[object Object],class Product < ActiveRecord::Base end 20

Example Controller Method ,[object Object],[object Object],[object Object],def index @products = Product.find(:all) end 21

But Wait, There’s More! ,[object Object],[object Object],[object Object],[object Object],22

About Productivity… ,[object Object],[object Object],[object Object],23

Who’s Using It? ,[object Object],[object Object],[object Object],[object Object],[object Object],24

How to Leverage Rails ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],25

Getting Started With Rails ,[object Object],[object Object],[object Object],26

What About Hosting? ,[object Object],[object Object],[object Object],[object Object],[object Object],27

A Tour of Ruby On Rails

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