Agile Web Development with Rails (Pragmatic Programmers) by Sam Ruby

By Sam Ruby

Ruby on Rails is helping you produce top of the range, beautiful-looking internet purposes speedy. you think about developing the appliance, and Rails looks after the main points. Tens of hundreds of thousands of builders have used this award-winning e-book to profit Rails. it is a wide, far-reaching instructional and reference that is urged by way of the Rails center group. in case you are new to Rails, you will get step by step assistance. if you are an skilled developer, this booklet provide you with the great, insider details you would like. Rails has developed through the years, and this e-book has advanced besides it. We nonetheless begin with a step by step walkthrough of creating a true program, and in-depth chapters examine the integrated Rails good points. This version now supplies new Ruby and Rails clients additional info at the Ruby language and takes extra time to provide an explanation for key options all through. most sensible practices on how one can practice Rails proceed to alter, and this variation retains up. Examples use cookie sponsored classes, HTTP authentication, and energetic Record-based types, and the booklet focuses all through at the correct technique to use Rails. also, this variation now displays Ruby 1.9, a brand new unlock of Ruby with large useful and function advancements.

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As we’ll explore further in Chapter 3, The Architecture of Rails Applications, on page 29, Rails is a Model-View-Controller framework. Rails accepts incoming requests from a browser, decodes the request to find a controller, and calls an action method in that controller. The controller then invokes a particular view to display the results to the user. The good news is that Rails takes care of most of the internal plumbing that links all these actions. ” application, we need code for a controller and a view, and we need a route to connect the two.

CHAPTER 2 Instant Gratification Let’s write a simple application to verify we have Rails snugly installed on our machines. Along the way, we’ll get a peek at the way Rails applications work. 1 Creating a New Application When you install the Rails framework, you also get a new command-line tool, rails, that is used to construct each new Rails application you write. Why do we need a tool to do this? Why can’t we just hack away in our favorite editor and create the source for our application from scratch?

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. So, to create a controller called say, we make sure we’re in the demo directory and run the command, passing in the name of the controller we want to create and the names of the actions we intend for this controller to support: demo> rails generate controller Say hello goodbye report erratum • discuss 18 • Chapter 2.

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