By Sam Ruby

Ruby on Rails is helping you produce top quality, beautiful-looking internet purposes fast. you consider developing the applying, and Rails looks after the main points. Tens of hundreds of thousands of builders have used this award-winning e-book to benefit Rails. it is a huge, far-reaching educational and reference that is prompt by means of the Rails center group. if you are new to Rails, you will get step by step suggestions. if you are an skilled developer, this e-book offers you the great, insider info you wish. Rails has advanced through the years, and this ebook has advanced besides it. We nonetheless begin with a step by step walkthrough of establishing a true program, and in-depth chapters examine the integrated Rails gains. This variation now offers new Ruby and Rails clients additional info at the Ruby language and takes extra time to give an explanation for key strategies all through. top practices on easy methods to practice Rails proceed to alter, and this version retains up. Examples use cookie sponsored periods, HTTP authentication, and energetic Record-based types, and the booklet focuses all through at the correct method to use Rails. also, this version now displays Ruby 1.9, a brand new liberate of Ruby with gigantic useful and function advancements.

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The Architecture of Rails Applications be a view that displays product information on a catalog page and another set of views used by administrators to add and edit products. Controllers orchestrate the application. Controllers receive events from the outside world (normally user input), interact with the model, and display an appropriate view to the user. This triumvirate—the model, view, and controller—together form an architecture known as MVC. To learn how the three concepts fit together, see Figure 4, The Model-View-Controller architecture, on page 31.

5. Rails processes this file through the ERB templating system, executing any embedded Ruby and substituting in values set up by the controller . 6. The result is returned to the browser, and Rails finishes processing this request. This isn’t the whole story—Rails gives you lots of opportunities to override this basic workflow (and we’ll be taking advantage of them shortly). As it stands, our story illustrates convention over configuration, one of the fundamental parts of the philosophy of Rails.

Com/rvm/install report erratum • discuss Setting Up Your Development Environment • 9 and run bundle install. We will cover this command in greater depth on page 427. 5 Setting Up Your Development Environment The day-to-day business of writing Rails programs is pretty straightforward. Everyone works differently; here’s how we work. The Command Line We do a lot of work at the command line. Although there are an increasing number of GUI tools that help generate and manage a Rails application, we find the command line is still the most powerful place to be.

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