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 internet framework that permits you to create full-featured, subtle web-based functions, yet with a twist... a whole Rails software most likely has much less overall code than the XML you would have to configure an analogous program in different frameworks. With this publication you are going to use "ActiveRecord" to attach company gadgets and database tables. not more painful object-relational mapping. simply create your small business items and permit Rails do the remainder. you will how to use the "Action Pack" framework to direction incoming requests and render pages utilizing easy-to-write templates and elements. See how one can take advantage of the Rails carrier frameworks to ship emails, enforce net providers, and create dynamic, user-centric web-pages utilizing integrated Javascript and Ajax help. There are vast chapters on checking 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 will be writing functions that paintings together with your favourite database (MySQL, Oracle, Postgres, and extra) very quickly in any respect. you are going to create an entire 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 fending off the additional paintings of configuration documents and code annotations. you could boost in real-time: make a transformation, and watch it paintings instantly. put out of your mind 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 wish to get the task performed good (and go away paintings ontime for a change). Rails is the framework of selection for the hot new release of net 2.0 builders. Agile internet improvement with Rails is the e-book for that iteration, written through Dave Thomas (Pragmatic Programmer and writer of Programming Ruby) and David Heinemeier Hansson, who created Rails.

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By setting the time to display in the controller, we make our application more flexible—we can change the display format and time zone in the controller without having to update any view that uses that time object. The Story So Far Let’s briefly review how our current application works. 1. The user navigates to our application. In our case, we do that using a local URL such as http://localhost:3000/say/hello. 2. Rails analyzes the URL. rb). 3. The next part of the URL path, hello, identifies an action.

4: Showing Details and Editing That’s why the New products form came up already knowing about the title, description, image, and price fields—because they are in the database table, they are added to the model. The form generator used by the scaffold can ask the model for information on these fields and uses what it discovers to create an appropriate HTML form. Controllers handle incoming requests from the browser. A single application can have multiple controllers. For our Depot application, it’s likely that we’ll end up with two of them, one handling the seller’s administration of the site and the other handling the buyer’s experience.

We’ll see how to create simple maintenance pages, link database tables, handle sessions, and create forms. Over the next eight chapters, we’ll also touch on peripheral topics such as unit testing, security, and page layout. 1 Incremental Development We’ll be developing this application incrementally. We won’t attempt to specify everything before we start coding. Instead, we’ll work out enough of a specification to let us start and then immediately create some functionality. We’ll try things out, gather feedback, and continue on with another cycle of mini-design and development.

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