By Sam Ruby
Ruby on Rails is helping you produce high quality, beautiful-looking internet functions fast. you consider developing the applying, and Rails looks after the main points. Tens of millions of builders have used this award-winning ebook to profit Rails. it is a wide, far-reaching instructional and reference that is suggested by means of the Rails center crew. if you are new to Rails, you will get step by step tips. in case you are an skilled developer, this ebook provides you with the great, insider info you wish. Rails has developed through the years, and this e-book has advanced in addition to it. We nonetheless commence with a step by step walkthrough of establishing a true program, and in-depth chapters examine the integrated Rails positive aspects. This variation now provides new Ruby and Rails clients additional information at the Ruby language and takes extra time to give an explanation for key suggestions all through. top practices on easy methods to follow Rails proceed to alter, and this variation retains up. Examples use cookie sponsored classes, 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 unencumber of Ruby with monstrous useful and function advancements.
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Extra info for Agile Web Development with Rails (Pragmatic Programmers)
... This approach would certainly work, but it’s a bit fragile. If we were to move our application to a different place on the web server, the URLs would no longer be valid. It also encodes assumptions about the Rails URL format into our code; it’s possible a future version of Rails might change this. Fortunately, these aren’t risks we have to take. Rails comes with a bunch of helper methods that can be used in view templates. Here, we’ll use the helper method link_to(), which creates a hyperlink to an action.
Application, we need code for a controller and a view, and we need a route to connect the two. We don’t need code for a model, because we’re not dealing with any data. 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. 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.
By following a set of conventions and partitioning your functionality appropriately, you’ll discover that your code becomes easier to work with and your application becomes easier to extend and maintain. Seems like a good trade. If MVC is simply a question of partitioning your code a particular way, you might be wondering why you need a framework such as Ruby on Rails. The answer is straightforward: Rails handles all of the low-level housekeeping for you—all those messy details that take so long to handle by yourself—and lets you concentrate on your application’s core functionality.
Agile Web Development with Rails (Pragmatic Programmers) by Sam Ruby