Learning Rails 3 by Simon St. Laurent, Edd Dumbill, Eric J. Gruber

By Simon St. Laurent, Edd Dumbill, Eric J. Gruber

If you’re an internet developer or clothier able to study Rails, this special e-book is the fitting technique to start.

Rather than throw you into the center of the framework’s Model-View-Controller structure, Learning Rails 3 works from the skin in. You’ll start with the rules of the net you know, and how one can create whatever noticeable with Rails’ view layer. Then you’ll take on the more challenging internal layers: the database types and controller code.

All you must start is HTML event. every one bankruptcy comprises workouts and evaluation inquiries to try your figuring out as you go.

• current content material by way of development an program with a simple view and an easy controller
• construct varieties and technique their effects, progressing from easy to extra complex
• attach kinds to types through constructing a database, and create code that maps to database structures
• Use Rails scaffolding to construct purposes from a view-centric perspective
• upload universal net software components resembling classes, cookies, and authentication
• construct purposes that mix information from a number of tables
• ship and obtain electronic mail messages out of your applications

"Learning Rails 3 seems like a brisk pair programming consultation with pros who understand how to exploit Ruby on Rails to get issues performed, and get them performed well."
-Alan Harris, writer of Sinatra: Up and operating

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Extra resources for Learning Rails 3

Example text

11 Model-View-Controller “You keep talking about views, controllers, and models. ” It’s a bit of programmer-speak: Model-View-Controller, or MVC, is an old idea that got its start in the Smalltalk programming world of the 1970s. The model is the underlying data structure, specific to the task the program is addressing; controllers manage the flow of data into and out of those objects; and views present the information provided by those controllers to users. MVC is an excellent approach for building maintainable applications, as each layer keeps its logic to itself.

A lot of sites use the same general structure—headers, stylesheets, and often navigation—across many or all pages. While you certainly could create a copy of the layout file for every controller your application uses, that would violate a core principle of Rails: Don’t Repeat Yourself, or DRY. Much of the time, it’ll make much more sense to create a layout that acts as the default for your entire application, and only create different layouts for the cases where you actually need them. I Want My CSS!

Lib Holds code that doesn’t quite fit into the model, view, or controller classifications, typically code that’s shared by these components or plug-ins you install. The tasks subdirectory contains Rake tasks for your application. log Gathers log data—not just errors, but very rich information on requests, how they were processed, how long it took to process them, and session data from the request. ico file for your application, as well as things like 404 Not Found error reporting pages. script The home for the prebuilt code you’ll be using to generate, run, and interact with large portions of your Rails application.

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