Download Agile Web Development with Rails (4th edition) Beta 12 by Sam Ruby, Dave Thomas, David Heinemeier Hansson PDF

By Sam Ruby, Dave Thomas, David Heinemeier Hansson

Ruby on Rails is helping you produce fine quality, beautiful-looking net purposes quick. you consider growing the applying, and Rails looks after the main points. Tens of millions of builders have used this award-winning e-book to profit Rails. it is a extensive, far-reaching educational and reference that is steered via the Rails center group. in case you are new to Rails, you will get step by step information. in case you are an skilled developer, this ebook provide you with the excellent, insider info you would like. Rails has advanced through the years, and this publication has advanced in addition to it. We nonetheless commence with a step by step walkthrough of establishing a true software, and in-depth chapters examine the integrated Rails positive aspects. This version now supplies new Ruby and Rails clients additional information at the Ruby language and takes extra time to give an explanation for key thoughts all through. top practices on the best way to follow Rails proceed to alter, and this version retains up. Examples use cookie subsidized classes, HTTP authentication, and lively Record-based kinds, and the booklet focuses all through at the correct method to use Rails. also, this variation now displays Ruby 1.9, a brand new unlock of Ruby with colossal useful and function advancements.

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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?

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