Beginning Rails 4 (Expert's Voice in Web Development)

Beginning Rails 4 (Expert's Voice in Web Development)

Adam Gamble, Rida Al Barazi

Language: English

Pages: 328

ISBN: 1430260343

Format: PDF / Kindle (mobi) / ePub

Beginning Rails 4 is a book that will guide you from never having programmed with Ruby, to having a Rails application built and deployed to the web. You'll learn how to combine all the components of Rails to develop your own web applications. 

You will learn how to use Git for source control and best practice techniques to create applications like a pro. Essential, and often-missed, information on testing and learning to program with Ruby are also covered.
This book is well suited for someone with little to no Ruby or Rails experience, or possibly even someone with no experience developing web applications at all. Beginning Rails 4 does assume a basic familiarity with the web and typical web terms, but doesn't require you to be an expert of these. This book will springboard your journey into web application development, and show you how much fun building web applications with Ruby on Rails can be.
  • Learn to create Rails applications from the bottom up
  • Learn the basics of the Ruby programming language
  • Completely updated for Rails 4, including new information on turbo links, etc.
Beginning Rails 4

gently guides you through designing your application, writing tests for the application, and then writing the code to make your application work as expected.

Bazaar Version Control

Beginning Android 4 Application Development

Programming iOS 8: Dive Deep into Views, View Controllers, and Frameworks

Arduino Projects to Save the World

Advanced Computer Architecture: Parallelism, Scalability, Programmability (2nd Edition)





















delete multiple rows by primary key, you must pass an actual array object. The following works, because it’s a single array (containing three items) and thus a single argument: Model.delete([1,2,3]). Deleting with Conditions You can delete all rows that match a given condition with the delete_all class method. The following deletes all articles before a certain date:   >> Article.delete_all("published_at < '2011-01-01'") >> 0   The return value of delete_all is the number of records deleted.

To get started, create a fresh Article object:   >> article = => #

>> article.errors.any? => false   This seems odd: you know this new article should have errors, because it’s invalid—you didn’t give it a title or a body. This is because you haven’t triggered the validations yet. You can cause them to occur a couple of ways. The most obvious way is to attempt to

article_id: 8, name: "Guest", ...>] >> user.replies.size => 1 Advanced Finding Chapter 5covered use of the find class method in Active Record. This section expands on different find operations using the where method. Building advanced finder methods is one of the most important things you do with your models. Using the where Method The most basic condition style is the hash syntax. Active Record takes the Hash passed to the where method and turns the keys into column names and the values into

application controller. Likewise, ApplicationController inherits all the capabilities of its parent, ActionController::Base. The ActionController::Base class effectively endows your articles controller with its special abilities. The application controller is the base from which all the controllers you make inherit. Because it’s the parent of all controllers in your application, it’s a great place to put methods that you want accessible in every controller. By looking at the articles controller,

the most popular of which are GET and POST. Both are methods for requesting a web page; the difference is in how the request is sent. GET is the simpler of the two. 140 Chapter 7 ■ Action Pack: Working with the View and the Controller It includes all the information about the request as part of the URL. POST sends information invisibly, which is to say, as part of the request header and not part of the URL. So, you can’t type a POST request into your browser’s location bar. Every time you

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