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Download Agile Web Development with Rails (4th edition) by Dave Thomas, David Heinemeier Hansson, Sam Ruby PDF

By Dave Thomas, David Heinemeier Hansson, Sam Ruby

Ruby on Rails is helping you produce top of the range, beautiful-looking internet functions quick. you consider growing the applying, and Rails looks after the details.

Tens of millions of builders have used this award-winning e-book to profit Rails. It's a vast, far-reaching educational and reference that's suggested through the Rails middle staff. If you're new to Rails, you'll get step by step suggestions. If you're an skilled developer, this publication provides you with the excellent, insider details you need.

Rails has developed through the years, and this booklet has advanced in addition to it. We nonetheless commence with a step by step walkthrough of creating a true software, and in-depth chapters examine the integrated Rails gains. This version now offers new Ruby and Rails clients additional information at the Ruby language and takes extra time to give an explanation for key ideas all through. most sensible practices on how you can practice Rails proceed to alter, and this version retains up. Examples use cookie sponsored periods, HTTP authentication, and energetic Record-based kinds, and the publication focuses all through at the correct option to use Rails. also, this variation now displays Ruby 1.9, a brand new unencumber of Ruby with giant practical and function improvements.

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Extra info for Agile Web Development with Rails (4th edition)

Sample text

Let’s start with the controller. In the same way that we used the rails command to create a new Rails application, we can also use a generator script to create a new controller for our project. This command is called rails generate. rb The rails generate command logs the files and directories it examines, noting when it adds new Ruby scripts or directories to your application. erb file. The first source file we’ll be looking at is the controller. rb. rb class SayController < ApplicationController def hello end def goodbye end end Pretty minimal, eh?

Builder templates starting on page 415. Rails also provides RJS views. These allow you to create JavaScript fragments on the server that are then executed on the browser. This is great for creating dynamic Ajax interfaces. We talk about these starting on page 148. And the Controller! The Rails controller is the logical center of your application. It coordinates the interaction between the user, the views, and the model. However, Rails handles most of this interaction behind the scenes; the code you write concentrates on application-level functionality.

The first source file we’ll be looking at is the controller. rb. rb class SayController < ApplicationController def hello end def goodbye end end Pretty minimal, eh? SayController is a class that inherits from ApplicationController, so it automatically gets all the default controller behavior. What does this code have to do? 0 printing, October 28, 2010) 40 H ELLO , R AILS ! 2: Template ready for us to fill in. action method named hello. To understand why this method is named this way, we need to look at the way Rails handles requests.

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