By Sam Ruby, Dave Thomas, David Heinemeier Hansson
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Extra info for Agile Web Development with Rails (4th edition) Beta 12 version
But before going any further let’s have a brief refresher— and for some of you, a brief introduction—to the Ruby language itself. 0 printing, January 10, 2011) 57 In this chapter, we’ll see • • • • • • objects: names, methods; data: strings, arrays, hashes, and regular expressions; control: if, while, blocks, iterators, exceptions; building blocks: classes, and modules; YAML and marshalling; and common idioms that you will see used in this book. Chapter 4 Introduction to Ruby Many people who are new to Rails are also new to Ruby.
In that case, we’d want to localize the display of the time, choosing a time appropriate to their time zone. That would be a fair amount of application-level code, and it would probably not be appropriate to embed it at the view level. By setting the time to display in the controller, we make our application more flexible—we can change the time zone in the controller without having to update any view that uses that time object. The time is data, and it should be supplied to the view by the controller.
This command is called rails generate. rb The rails generate command logs the files and directories it examines, noting when it adds new Ruby scripts or directories to your application. erb files. The first source file we’ll be looking at is the controller. rb. rb class SayController < ApplicationController def hello end def goodbye end end Pretty minimal, eh? SayController is a class that inherits from ApplicationController, so it automatically gets all the default controller behavior. What does this code have to do?