Read e-book online Agile Web Development with Rails (3rd Edition) PDF

By Dave Thomas, David Heinemeier Hansson, Sam Ruby

You are looking to write professional-grade purposes: Rails is a full-stack, open-source internet framework, with built-in aid for unit, useful, and integration trying out. It enforces reliable layout ideas, consistency of code throughout your staff (and throughout your organization), and correct free up administration.

yet Rails is greater than a collection of most sensible practices. Rails makes it either enjoyable and straightforward to show out very cool net functions. desire Ajax help, so your internet purposes are hugely interactive? Rails has it inbuilt. wish an program that sends and gets email? in-built. helps internationalization and localization? inbuilt. do you want purposes with a REST-based interface (so they could have interaction with different RESTful purposes with nearly no attempt in your part)? All integrated.

With this e-book, you'll tips on how to use ActiveRecord to attach enterprise gadgets and database tables. not more painful object-relational mapping. simply create your small business gadgets and permit Rails do the remainder. have to create and alter your schema? Migrations make it painless (and they're versioned, so that you can roll adjustments backward and forward). You'll the right way to use the motion Pack framework to direction incoming requests and render pages utilizing easy-to-write templates and parts. See tips on how to make the most the Rails carrier frameworks to ship emails, enforce internet prone, and create dynamic, user-centric web-pages utilizing integrated Javascript and Ajax help. there's wide insurance of trying out, and the rewritten Deployment bankruptcy now covers Phusion Passenger.

As with the former variants of the booklet, we begin with a longer instructional that builds components of an internet shop. And, in fact, the applying has been rewritten to teach the simplest of Rails V2.

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Additional info for Agile Web Development with Rails (3rd Edition)

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Line in the output. Similarly, the newline after <% end %> accounts for the blank line between the last Ho! line and the Merry Christmas! line. Normally, this doesn’t matter, because HTML doesn’t much care about whitespace. However, if you’re using this templating mechanism to create e-mails or HTML within

 blocks, you’ll want to remove these blank lines.  0 printing, March 2009) 52 H ELLO , R AILS !  by changing the end of the ERb sequence from %> to -%>.  That minus sign tells Rails to remove any newline that follows from the output. 

In Chapter 5, The Depot Application, on page 63, we’ll start writing something more substantial—a simple online store application. 1 Your Shopping List To get Rails running on your system, you’ll need the following: • A Ruby interpreter. Rails is written in Ruby, and you’ll be writing your applications in Ruby too. 7. • Ruby on Rails. 1 • Some libraries. • A database. We’re using SQLite 3 in this book. For a development machine, that’s about all you’ll need (apart from an editor, and we’ll talk about editors separately).

Fortunately, these aren’t risks we have to take. Rails comes with a bunch of helper methods that can be used in view templates.

It is now <%= @time %>. %> sequence. This creates a link to a URL that will invoke the goodbye action. The first parameter in the call to link_to is the text to be displayed in the hyperlink, and the next parameter tells Rails to generate the link to the goodbye action. Because we don’t specify a controller, the current one will be used. 10. The link_to method can do a lot more than this, but let’s take it gently for now....

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