By Sam Ruby, Dave Thomas, David Heinemeier Hansson
Ruby on Rails is helping you produce top quality, beautiful-looking net functions fast. you think about developing the applying, and Rails looks after the main points. Tens of millions of builders have used this award-winning ebook to profit Rails. it is a wide, far-reaching educational and reference that is steered via the Rails middle group. if you are new to Rails, you will get step by step advice. if you are an skilled developer, this booklet offers you the excellent, insider info you wish. Rails has advanced through the years, and this e-book has advanced besides it. We nonetheless commence with a step by step walkthrough of creating a true software, and in-depth chapters examine the integrated Rails good points. This version now provides new Ruby and Rails clients additional info at the Ruby language and takes extra time to provide an explanation for key strategies all through. most sensible practices on the right way to follow Rails proceed to alter, and this variation retains up. Examples use cookie subsidized periods, HTTP authentication, and energetic Record-based types, and the publication focuses all through at the correct solution to use Rails. also, this variation now displays Ruby 1.9, a brand new liberate of Ruby with large sensible and function advancements.
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Additional info for Agile Web Development with Rails (4th edition) Beta 12 version
Although the view may present the user with various ways of inputting data, the view itself never handles incoming data. The view’s work is done once the data is displayed. There may well be many views that access the same model data, often for different purposes. 1: The Model-View-Controller architecture be a view that displays product information on a catalog page and another set of views used by administrators to add and edit products. Controllers orchestrate the application. Controllers receive events from the outside world (normally user input), interact with the model, and display an appropriate view to the user.
Even applications that normally use unstructured text, such as weblogs and news sites, often use databases as their backend data store. Although it might not be immediately apparent from the SQL1 you use to access them, relational databases are actually designed around mathematical set theory. Although this is good from a conceptual point of view, it makes it difficult to combine relational databases with object-oriented (OO) programming languages. Objects are all about data and operations, and databases are all about sets of values.
During the development of our application we will be making heavy use of Rails’ ability to generate scaffolding for our application. Ruby on Rails is an MVC framework, too. Rails enforces a structure for your application—you develop models, views, and controllers as separate chunks of functionality, and it knits them all together as your program executes. 2: Rails and MVC metadata to make it all work. This is an example of the Rails philosophy of favoring convention over configuration. In a Rails application, an incoming request is first sent to a router, which works out where in the application the request should be sent and how the request itself should be parsed.
Agile Web Development with Rails (4th edition) Beta 12 version by Sam Ruby, Dave Thomas, David Heinemeier Hansson