Beginning Rails 3 by Cloves Carneiro Jr., Rida Al Barazi

By Cloves Carneiro Jr., Rida Al Barazi

Starting Rails three is the sensible place to begin for someone eager to construct dynamic internet purposes utilizing the Rails framework for Ruby. You'll learn the way the entire elements of Rails healthy jointly and the way you could leverage them to create refined net purposes with much less code and extra joy.

This booklet is very like minded to these with very little adventure with internet software improvement, or who've a few adventure yet are new to Rails. starting Rails three assumes uncomplicated familiarity with internet phrases and applied sciences, yet doesn't require you to be knowledgeable. instead of delving into the arcane information of Rails, the focal point is at the points of the framework that may develop into your choose, shovel, and awl. half heritage lesson, half creation to object-oriented programming, and half dissertation on open resource software program, this name doesn't simply clarify how you can do anything in Rails, it explains why.

* learn how to create Rails net purposes from scratch
* encompasses a mild advent to the Ruby programming language
* thoroughly up-to-date to incorporate the beneficial properties of Rails three

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Apple’s Developer Tools package, Xcode Tools, includes a compiler and provides the easiest way to set up a development environment on your Mac. html. „ NOTE Before proceeding, be aware that Xcode is a large download. Weighing in at over 1GB, it’s not the sort of thing you want to be downloading over a slow Internet connection. Before you begin downloading, you may want to try to find it on your installation DVD. Xcode is packaged as a regular Apple installer (look for it on the installation DVD), so all you need to do is double-click its icon and answer a few basic questions, and you should be on your way.

Erb template. Start up the web server again using the rails server command, and request the URL http://localhost:3000/salutation/hello in your browser. You should see the result shown in Figure 2-4. Figure 2-4. The “Hello World” application Sure enough, there’s your greeting! The hello template reads the @message variable that you set in the controller and, with a little help from ERb, printed it out to the screen. rb file. :format))) For now, it’s enough that you can make the mental connection between URL segments and the code in your application.

Access denied for user 'root'@'localhost' (using password: NO) then you need to adjust your connection settings. yml configuration file. Creating the Article Model Now that you can connect to the database, in this section you create a model. Remember that models in Rails correspond to database table names. Because you want to model articles, let’s create a model named Article. By convention, model names are singular and correspond to plural table names. So, an Article model expects a table named articles; a Person model expects a table named people.

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