Get Agile Web Development with Rails (4th edition) PDF

By Dave Thomas, David Heinemeier Hansson, Sam Ruby

Ruby on Rails is helping you produce high quality, beautiful-looking internet functions quick. you think about growing the appliance, and Rails looks after the details.

Tens of hundreds of thousands of builders have used this award-winning ebook to benefit Rails. It's a wide, far-reaching instructional and reference that's advised via the Rails middle workforce. If you're new to Rails, you'll get step by step counsel. If you're an skilled developer, this publication offers you the excellent, insider details you need.

Rails has advanced through the years, and this e-book has developed in addition to it. We nonetheless begin with a step by step walkthrough of creating a true program, and in-depth chapters examine the integrated Rails positive factors. This variation now offers new Ruby and Rails clients additional info at the Ruby language and takes extra time to provide an explanation for key recommendations all through. top practices on the best way to follow Rails proceed to alter, and this version retains up. Examples use cookie subsidized periods, HTTP authentication, and lively Record-based varieties, and the e-book focuses all through at the correct strategy to use Rails. also, this version now displays Ruby 1.9, a brand new free up of Ruby with sizeable useful and function improvements.

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Additional resources for Agile Web Development with Rails (4th edition)

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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. 0 printing, October 28, 2010) L INKING P AGES T OGETHER 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.

This is great for development. However, this flexibility comes at a cost—it causes a short pause after you enter a URL before the application responds. That’s caused by the dispatcher reloading stuff. For development it’s a price worth paying, but in production it would be unacceptable. Because of this, this feature is disabled for production deployment (see Chapter 16, Task K: Deployment and Production, on page 239). erb template works. Each time we access this page, the user will see the current time substituted into the body of the response.

1_ --version This is particularly handy when you create a new application, because once you create an application with a specific version of Rails, it will continue to use that version of Rails—even if newer versions are installed on the system— until you decide it is time to upgrade. To upgrade, simply update the version number in the Gemfile that is in the root directory of your application, and run bundle install. We will cover this command in greater depth on page 419. 5 Setting Up Your Development Environment The day-to-day business of writing Rails programs is pretty straightforward.

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