Download Building Dynamic Web 2.0 Websites with Ruby on Rails by A P Rajshekhar PDF

By A P Rajshekhar

Discover ways to create dynamic web pages with Ruby on Rails. This ebook is for somebody who has easy ideas of object-oriented programming in addition to relational databases and desires to enhance on-line functions utilizing Ruby on Rails. past wisdom of Ruby or Rails isn't really anticipated.

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Summary This chapter introduced you to the basics of Ruby including classes, attributes, methods, and blocks, as well as the main concepts and components of RoR. We have also seen how to set up the application structure. In the next chapter, the development of the TaleWiki application starts, where these concepts will help you in building the application. So get ready for RoR in real world.

Apart from these, RoR makes heavy use of hash like structures and anonymous code blocks to reduce configuration. Now that you have had a taste of how RoR makes use of Ruby, let us go the next aspect of RoR. [ 39 ] Getting to Know Ruby and RoR RoR Implements MVC Pattern You will have definitely heard the term MVC being used with different frameworks. But what is MVC and how is RoR concerned with it? MVC is a design pattern that provides a clear-cut demarcation between three aspects of an application—data access logic, the control flow logic, and the presentation logic.

View—the logic corresponding to the display of the data held by the Model is provided by the View. It is the only aspect of MVC that directly interacts with the user. • Controller— It represents the control flow logic. The decisions about which View has to be called to display the current data, which part of the Model has to be updated are taken care of by the Controller. It sits at the boundary of your application and intercepts each request. It then calls the corresponding Model to update or retrieve data, and then chooses the appropriate View to display the data.

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