Agile Web Development with Rails: A Pragmatic Guide by Dave Thomas

By Dave Thomas

Rails is a full-stack, open resource net framework that allows you to create full-featured, subtle web-based functions, yet with a twist... an entire Rails program most likely has much less overall code than the XML you would have to configure a similar program in different frameworks. With this e-book you are going to easy methods to use ActiveRecord to attach enterprise items and database tables. not more painful object-relational mapping. simply create your enterprise gadgets and permit Rails do the remainder. you will the best way to use the motion Pack framework to course incoming requests and render pages utilizing easy-to-write templates and elements. See find out how to make the most the Rails carrier frameworks to ship emails, enforce net providers, and create dynamic, user-centric web-pages utilizing integrated Javascript and Ajax aid. There are wide chapters on trying out, deployment, and scaling. you will see how effortless it truly is to put in Rails utilizing your internet server of selection (such as Apache or lighttpd) or utilizing its personal integrated internet server. you can be writing functions that paintings together with your favourite database (MySQL, Oracle, Postgres, and extra) very quickly in any respect. you will create an entire on-line shop program within the prolonged educational part, so you will see how a whole Rails program is constructed - iteratively and quickly. Rails strives to honor the Pragmatic Programmer's "DRY precept" through heading off the additional paintings of configuration documents and code annotations. you could improve in real-time: make a metamorphosis, and watch it paintings instantly. fail to remember XML. every thing in Rails, from templates to manage circulate to enterprise good judgment, is written in Ruby, the language of selection for programmers who prefer to get the task performed good (and go away paintings on time for a change). Rails is the framework of selection for the hot new release of internet 2.0 builders. Agile net improvement with Rails is the publication for that iteration, written by way of Dave Thomas (Pragmatic Programmer and writer of Programming Ruby) and David Heinemeier Hansson, who created Rails.

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7 Keeping Up-to-Date Assuming you installed Rails using RubyGems, keeping up-to-date is relatively easy. Issue the command dave> gem update rails --include-dependencies and RubyGems will automatically update your Rails installation. The next time you start your application, it will pick up this latest version of Rails. ) RubyGems keeps previous versions of the libraries it installs. You can delete these with the command dave> gem cleanup After installing a new version of Rails, you might also want to update the files that Rails initially added to your applications (the JavaScript libraries it uses for AJAX support, various scripts, and so on).

This is a great foundation. Now let’s start building real applications. Playtime Here’s some stuff to try on your own. • Write a page for the say application that illustrates the looping you can do in ERb. , changing %> into -%>, and vice versa. Use your browser’s View → Source option to see the difference. • A call to the following Ruby method returns a list of all the files in the current directory. glob('*' ) 59 W HAT W E J UST D ID Use it to set an instance variable in a controller action, and then write the corresponding template that displays the filenames in a list on the browser.

Under Linux, you’ll need gcc and friends (but these will likely already be installed). Under OS X, you’ll need to install the developer tools (they come with the operating system but aren’t installed by default). You’ll also need to install your database driver into the correct version of Ruby. In the installation instructions starting back on page 34 we installed our own copy of Ruby, bypassing the built-in one. It’s important to remember to have this version of Ruby first in your path when building and installing the database driver.

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Agile Web Development with Rails: A Pragmatic Guide by Dave Thomas
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