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Extra info for Agile Web Development with Rails (4th edition) Beta 13 (2011)
If MVC is simply a question of partitioning your code a particular way, you might be wondering why you need a framework such as Ruby on Rails. The answer is straightforward: Rails handles all of the low-level housekeeping for you—all those messy details that take so long to handle by yourself—and lets you concentrate on your application’s core functionality. Let’s see how. 2 Rails Model Support In general, we’ll want our web applications to keep their information in a relational database. Order-entry systems will store orders, line items, and customer details in database tables.
That’s all there is to an MVC web application. By following a set of conventions and partitioning your functionality appropriately, you’ll discover that your code becomes easier to work with and your application becomes easier to extend and maintain. Seems like a good trade. If MVC is simply a question of partitioning your code a particular way, you might be wondering why you need a framework such as Ruby on Rails. The answer is straightforward: Rails handles all of the low-level housekeeping for you—all those messy details that take so long to handle by yourself—and lets you concentrate on your application’s core functionality.
0 printing, February 2, 2011) 48 W HAT W E J UST D ID The say_goodbye_path is a precomputed value that Rails makes available to application views. It evaluates to the /say/goodbye path. Over time you will see that Rails provides the ability to name all the routes that you will be using in your application. OK, back to the application.
It was nice having you here.
Say <%= link_to "Hello", say_hello_path %> again.
At this point, we’ve completed our toy application and in the process verified that our installation of Rails is functioning properly.