Agile Web Development with Rails (2nd Edition) by Justin Gehtland, James Duncan Davidson, Dave Thomas, David

By Justin Gehtland, James Duncan Davidson, Dave Thomas, David Heinemeier Hansson, Leon Breedt, Mike Clark, Andreas Schwarz

The definitive, Jolt-award profitable advisor to studying and utilizing Rails is now in its moment version. Rails is a brand new method of web-based software improvement that permits builders to create full-featured, refined web-based purposes utilizing much less code and not more attempt. Now programmers can get the activity performed correct and nonetheless go away paintings on time.
NEW within the moment variation: The e-book has been up to date to exploit all of the new Rails 1.2 gains. The pattern software makes use of migrations, Ajax, incorporates a leisure interface, and illustrates new Rails beneficial properties. There are new chapters on migrations, lively aid, lively list, and motion controller (including the hot resources-based routing). the internet 2.0 and Deployment chapters were thoroughly rewritten to mirror the most recent pondering. you can now research which environments are top on your kind program, and notice how Capistrano makes coping with your website uncomplicated. all of the closing chapters were commonly up-to-date. eventually, 1000s of reviews from readers of the 1st variation were integrated, making this booklet easily the simplest to be had.
Rails is a full-stack, open resource internet framework that permits you to create full-featured, subtle web-based purposes with a twist...you can create an entire Rails software utilizing much less code than the setup XML you'd want simply to configure another frameworks.
With this booklet, you'll the right way to use Rails energetic list to attach company items and database tables. not more painful object-relational mapping. simply create your corporation gadgets and enable Rails do the remainder. You'll how to use the motion Pack framework to course incoming requests and render pages utilizing easy-to-write templates and elements. See tips to make the most the Rails carrier frameworks to ship emails, seek advice from internet prone, and have interaction dynamically with JavaScript purposes working within the browser (the "Ajax" architecture).
You'll see how effortless it's to install Rails. You'll be writing purposes that paintings along with your favourite database (MySQL, Oracle, Postgres, and extra) very quickly in any respect.

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By providing convenient defaults and by applying certain conventions, Rails applications are typically written using little or no external configuration—things just knit themselves together in a natural way. 3 Linking Pages Together It’s a rare web application that has just one page. Let’s see how we can add another stunning example of web design to our Hello, World! application. Normally, each style of page in your application will correspond to a separate view. In our case, we’ll also use a new action method to handle the page (although that isn’t always the case, as we’ll see later in the book).

At this point, we have a new application running, but it has none of our code in it. Let’s rectify this situation. 2 Hello, Rails! I can’t help it—I just have to write a Hello, World! program to try a new system. The equivalent in Rails would be an application that sends our cheery greeting to a browser. As we saw in Chapter 2, The Architecture of Rails Applications, on page 22, Rails is a Model-View-Controller framework. Rails accepts incoming requests from a browser, decodes the request to find a controller, and calls an action method in that controller.

Back to the application. If we point our browser at our hello page, it will now contain the link to the goodbye page, as shown here. 7. Symbols probably cause more confusion than any other language feature when folks first come to Ruby. We’ve tried many different explanations—no single explanation works for everyone. For now, you can just think of a Ruby symbol as being like a constant string but one without all the string methods. It’s the name tag, not the person. rhtml, linking it back to the initial hello page.

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