Ruby on Rails Introduction

Ruby on Rails is a framework that makes it easier to develop, deploy, and maintain web applications. During the months that followed its initial release, Rails went from being an unknown toy to being a worldwide phenomenon; more important, it has become the framework of choice for the implementation of a wide range of so-called Web 2.0 applications.

A large number of developers were frustrated with the technologies they were using to create web applications. It didn’t seem to matter whether they used Java, PHP, or .NET—there was a growing sense that their jobs were just too damn hard. And then, suddenly, along came Rails, and Rails was easier.

All Rails applications are implemented using the Model-View- Controller (MVC) architecture. Rails applications are written in Ruby, a modern, object-oriented scripting language. This makes our programs shorter and more readable. just think about how much information is being expressed in a few lines of code.

class Project < ActiveRecord::Base
belongs_to :portfolio
has_one :project_manager
has_many :milestones
has_many :deliverables, through: milestones
validates :name, :description, presence: true
validates :non_disclosure_agreement, acceptance: true
validates :short_name, uniqueness: true
end