Agile Web Development with Rails 3.1 (Pragmatic Programmers) by Sam Ruby, Dave Thomas, David Heinemeier Hansson

By Sam Ruby, Dave Thomas, David Heinemeier Hansson

Ruby on Rails is helping you produce high quality, beautiful-looking internet purposes quick. you consider growing the appliance, and Rails looks after the main points. Tens of millions of builders have used this award-winning booklet to benefit Rails. it is a extensive, far-reaching instructional and reference that is prompt through the Rails middle workforce. if you are new to Rails, you will get step by step tips. in case you are an skilled developer, this booklet offers you the great, insider details you would like. Rails has advanced through the years, and this e-book has developed 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 supplies new Ruby and Rails clients additional information at the Ruby language and takes extra time to provide an explanation for key ideas all through. most sensible practices on find out how to practice Rails proceed to alter, and this variation retains up. Examples use cookie sponsored periods, HTTP authentication, and energetic Record-based varieties, and the booklet focuses all through at the correct approach to use Rails. also, this variation now displays Ruby 1.9, a brand new unencumber of Ruby with colossal practical and function advancements.

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Additional resources for Agile Web Development with Rails 3.1 (Pragmatic Programmers)

Example text

We simply have an empty action method named hello. To understand why this method is named this way, we need to look at the way Rails handles requests. Rails and Request URLs Like any other web application, a Rails application appears to its users to be associated with a URL. When you point your browser at that URL, you are talking to the application code, which generates a response to you. Let’s try it now. Navigate to the URL http://localhost:3000/say/hello in a browser window. ) You’ll see something that looks like Figure 2, ​Template ready for us to fill in​.

It’s difficult to tell exactly, but our impression is that creating each edition of Agile Web Development with Rails took about as much effort as the first edition. Rails is constantly evolving and, as it does, so has this book. Parts of the Depot application were rewritten several times, and all of the narrative was updated. The emphasis on REST and the avoidance of features as they become deprecated have repeatedly changed the structure of the book as what was once hot became just lukewarm. So, this book would not exist without a massive amount of help from the Ruby and Rails communities.

First, how do we add dynamic content to a template? Second, where do we get the time from? Dynamic Content There are many ways of creating dynamic templates in Rails. The most common way, which we’ll use here, is to embed Ruby code in the template itself. erb suffix tells Rails to expand the content in the file using a system called ERB. ERB is a filter that is installed as part of the Rails installation that takes an erb file and outputs a transformed version. The output file is often HTML in Rails, but it can be anything.

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