Read e-book online Agile web development with rails: a Pragmatic guide PDF

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

ISBN-10: 097669400X

ISBN-13: 9780976694007

Rails is a full-stack, open resource net framework that allows 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'll have to configure a similar program in different frameworks. With this booklet you are going to how one can use "ActiveRecord" to attach enterprise gadgets and database tables. not more painful object-relational mapping. simply create your online business items and allow Rails do the remainder. you will how to use the "Action Pack" framework to course incoming requests and render pages utilizing easy-to-write templates and elements. See how you can 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 aid. There are broad chapters on trying out, deployment, and scaling. you will see how effortless it really is to put in Rails utilizing your net server of selection (such as Apache or lighttpd) or utilizing its personal incorporated net server. you can be writing functions that paintings along with your favourite database (MySQL, Oracle, Postgres, and extra) very quickly in any respect. you are going to create a whole on-line shop software within the prolonged educational part, so you will see how a whole Rails program is developed---iteratively and swiftly. Rails strives to honor the Pragmatic Programmer's "DRY precept" by means of keeping off the additional paintings of configuration documents and code annotations. you could increase in real-time: make a metamorphosis, and watch it paintings instantly. disregard XML. every thing in Rails, from templates to regulate stream to enterprise common sense, is written in Ruby, the language of selection for programmers who wish to get the activity performed good (and depart paintings ontime for a change). Rails is the framework of selection for the hot iteration of internet 2.0 builders. Agile internet improvement with Rails is the ebook for that new release, written through Dave Thomas (Pragmatic Programmer and writer of Programming Ruby) and David Heinemeier Hansson, who created Rails.

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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 created the product maintenance scaffolding in the Admin controller, which is why the URL that accesses it has admin at the start of its path. The utility that generates a Rails scaffold populates your application’s directory tree with working Ruby code. If you examine it, you’ll find that what you have is the bare bones of a full application—the Ruby code has been placed inline; it’s all in the source, rather than simply being a single call into some standard library.

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). We’ll use the same controller for both actions. Again, this needn’t be the case, but we have no compelling reason to use a new controller right now. We already know how to add a new view and action to a Rails application. To add the action, we define a new method in the controller.

At this stage in the development, we don’t know if we’ll even be using a database—sometimes a flat file beats a database table hands down. 3 . Again, pencil and paper seems a whole lot easier than some fancy tool, but use whatever works for you. 3: Initial Guess at Application Data Working on the data diagram raised a couple of questions. As the user builds their shopping cart, we’ll need somewhere to keep the list of products she’s added to it, so I added a cart. But apart from its use as a transient place to keep this list, the cart seems to be something of a ghost—I couldn’t find anything meaningful to store in it.

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


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