Agile web development with rails: a Pragmatic guide by Dave Thomas, David Heinemeier Hansson, Leon Breedt, Mike

By Dave Thomas, David Heinemeier Hansson, Leon Breedt, Mike Clark, Thomas Fuchs, Andrea Schwarz

Rails is a full-stack, open resource net framework that permits you to create full-featured, refined web-based purposes, yet with a twist... a whole Rails program most likely has much less overall code than the XML you'll have to configure an identical software in different frameworks. With this booklet you are going to the best way to use "ActiveRecord" to attach company items and database tables. not more painful object-relational mapping. simply create what you are promoting gadgets and enable Rails do the remainder. you will how you can use the "Action Pack" framework to direction incoming requests and render pages utilizing easy-to-write templates and parts. See easy methods to make the most the Rails carrier frameworks to ship emails, enforce internet companies, and create dynamic, user-centric web-pages utilizing integrated Javascript and Ajax aid. There are large chapters on trying out, deployment, and scaling. you will see how effortless it truly is to put in Rails utilizing your net server of selection (such as Apache or lighttpd) or utilizing its personal integrated internet server. you will be writing purposes that paintings along with your favourite database (MySQL, Oracle, Postgres, and extra) very quickly in any respect. you will create a whole on-line shop program within the prolonged instructional part, so you will see how an entire Rails program is developed---iteratively and speedily. Rails strives to honor the Pragmatic Programmer's "DRY precept" through warding off the additional paintings of configuration records and code annotations. you could advance in real-time: make a transformation, and watch it paintings instantly. put out of your mind XML. every little thing in Rails, from templates to manage move to enterprise good judgment, is written in Ruby, the language of selection for programmers who prefer to get the task performed good (and depart paintings ontime for a change). Rails is the framework of selection for the hot new release of net 2.0 builders. Agile net improvement with Rails is the booklet for that new release, written via Dave Thomas (Pragmatic Programmer and writer of Programming Ruby) and David Heinemeier Hansson, who created Rails.

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3, on the next page). Perhaps it isn’t the prettiest interface, but it works, and we can show it to our client for approval. 4, on page 56). We explain to them that this is only a first step—we know it’s rough, but we wanted to get their feedback early. ) Rails Scaffolds We covered a lot of ground in a very short initial implementation, so let’s take a minute to look at that last step in a bit more detail. A Rails scaffold is an autogenerated framework for manipulating a model. When we run the generator, we tell it that we want a scaffold for a particular model (which it creates) and that we want to access it through a given controller (which it also creates).

Rhtml? ) For now, let’s just put some basic HTML in there. rhtml, and refresh your browser window. You should see it display our friendly greeting. Notice that we didn’t have to restart the application to see the update. During development, Rails automatically integrates changes into the running application as you save files. So far, we’ve added code to two files in our Rails application tree. We added an action to the controller, and we created a template to display a page in the browser. These files live in standard locations in the Rails hierarchy: controllers go into app/controllers, and views go into subdirectories of app/views.

Our application will use this when we put it online. We’ll use the mysql command-line client to create our databases, but if you’re more comfortable with tools such as phpmyadmin or CocoaMySQL, go for it. ) depot> mysql -u root -p Enter password: ******* Welcome to the MySQL monitor. mysql> mysql> mysql> mysql> mysql> mysql> mysql> Commands end with ; or \g. 3, on page 47, we sketched out the basic content of the products table. Now let’s turn that into reality. Here’s the Data Definition Language (DDL) for creating the products table in MySQL.

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