By Cloves Carneiro Jr., Rida Al Barazi
Starting Rails three is the sensible start line for someone eager to how one can construct dynamic internet purposes utilizing the Rails framework for Ruby. You'll learn the way all the parts of Rails healthy jointly and the way you could leverage them to create refined internet purposes with much less code and extra joy.
This ebook is very like minded to these with very little event with net program 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 a professional. instead of delving into the arcane information of Rails, the point of interest is at the points of the framework that would turn into your decide, shovel, and awl. half historical past lesson, half advent to object-oriented programming, and half dissertation on open resource software program, this name doesn't simply clarify the way to do whatever in Rails, it explains why.
* learn how to create Rails internet purposes from scratch
* features a light advent to the Ruby programming language
* thoroughly up to date to incorporate the positive aspects of Rails three
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Additional resources for Beginning Rails 3
Generating a Controller You’ve created a model and its supporting database table, so the next step is to work on the controller and view side of the application. Let’s create a controller named (wait for it) articles to control the operation of the application’s articles functionality. rb: The controller that is responsible for handling requests and responses for anything to do with articles. rb: The class that contains all functional tests for the articles controller (Chapter 10 covers testing applications).
Ubuntu Linux includes the Debian package manager apt, which is what the examples use. If you’re using a different distribution, you likely have a different package manager, but the steps should be reasonably similar. Before you begin installing Ruby, Rails, and SQLite, update the package library using apt-get update: $ sudo apt-get update The apt-get program keeps a cached index of all the programs and their versions in the repository for faster searching. Running the update command ensures that this list is up to date, so you get the most recent versions of the software you need.
However, because you already told Rails the database connection details, you can now run a Rake task that talks to the database and issues all the necessary commands to set up the databases. Jump to the command prompt and type $ rake db:create 34 CHAPTER 3 GETTING SOMETHING RUNNING When using SQLite, you aren’t forced to create the database, because a new database file is automatically created if one doesn’t exist; but it will come handy when you try a different database engine. ” Don’t be afraid—this is an indication that a SQLite file was found.