Ruby on Rails Installation - Ruby on Rails

The following softwares are to be installed before developing a web application using Ruby on Rails framework -

  • Ruby
  • The Rails Framework
  • A Web Server
  • A Database System

If you haven't already, install a Web Server and a Database System on your computer. You can use the WEBrick Web Server, which comes with Ruby. Most websites however use Apache or lightTPD web servers in production.

Rails works with many database systems, including MySQL, PostgreSQL, SQLite, Oracle, DB2 and SQL Server. Set up your database refering to a corresponding Database System Setup manual.

Over to the installation instructions for Rails on Windows and Linux now.

How to install Rails Windows?

Follow the steps given below for installing Ruby on Rails.

Step 1: Check Ruby Version

First, check if you already have Ruby installed. Open the command prompt and type ruby -v. If Ruby responds, and if it shows a version number at or above 2.2.2, then type gem --version. If you don't get an error, skip Install Ruby step. Otherwise, we'll install a fresh Ruby.

Step 2: Install Ruby

If Ruby is not installed, you have to download an installation package from rubyinstaller.org. Follow the download link, and run the installer, which is an exe file rubyinstaller-2.2.2.x.exe and will be installed in a single click.

Ruby home

Step 3: Install Rails

Once Rubygems are loaded, you can install all of Rails and its dependencies using the following command through the command line

Gem installation

The above command may take some time to install all dependencies. Please make sure you are connected to the internet while installing gems dependencies.

Step 4: Check Rails Version

Use the following command to check the rails version.

Output

Congratulations! You are now on Rails over Windows.

How to install Rails on Linux

We are installing Ruby On Rails on Linux using rbenv, which is a lightweight Ruby Version Management Tool. It provides an easy installation procedure to manage various versions of Ruby, and a solid environment for developing Ruby on Rails applications.

Follow the steps given below to install Ruby on Rails using rbenv tool.

Step 1: Install Prerequisite Dependencies

First, install git – core and some ruby dependences that help to install Ruby on Rails. Use the following command for installing Rails dependencies using yum.

Step 2: Install rbenv

Next, install rbenv and set the appropriate environment variables. Use the following set of commands to get rbenv for git repository.

Step 3: Install Ruby

Now determine which version of Ruby you want to install. We will install Ruby 2.2.3. Use the following command for installing Ruby.

Use the following command for setting up the current Ruby version as default

Use the following command to verify the Ruby version.

Output

Ruby provides a keyword gem for installing the supported dependencies; we call them gems. If you want, you can skip installation of the documentation for Ruby-gems using the following command.

Thereafter, it is adviceable to install the Bundler gem, as it helps to manage your application dependencies. Use the following command to install bundler gem.

Step 4: Install Rails

Use the following command for installing Rails version 4.2.4.

Use the following command to make Rails executable available.

Use the following command for checking the rails version.

Output

JavaScript Runtime Environment (Node.js) is required for Ruby on Rails to manage the features of Rails. Next, we will see how we can use Node.js to manage Asset Pipeline which is a Rails feature.

Step 5: Install JavaScript Runtime

Install Node.js from the Yum repository. We will take Node.js from EPEL yum repository. Use the following command to add the EPEL package to the yum repository.

Use the following command for installing the Node.js package.

Congratulations! You are now on Rails over Linux.

Step 6: Install Database

By default, Rails uses sqlite3. You are free to install MySQL, PostgreSQL, or other RDBMS. This is optional; if you have the database installed, then you may skip this step and it is not mandatory that you have a database installed to start the rails server. Here, we are using PostgreSQL database. Therefore use the following commands to install PostgreSQL.

Accept the prompt, by responding with a y. Use the following command to create a PostgreSQl database cluster.

Use the following command to start and enable PostgreSQL.

How to keep Rails Up-to-Date

If you have installed Rails using RubyGems, keeping it up-to-date is relatively easy. We can use the same command in both Windows and Linux platform. Use the following command -

Output

Below screenshot shows a Windows command prompt, which is also the same as the Linux terminal

Gem updation

Once this is done, it will automatically update your Rails installation and it will pick up this latest version of Rails next you start it. While using this command, make sure you are connected to the internet.

Installation Verification

Verify if everything is set up according to your requirements or not. Use the following command to create a demo project.

Output

Rails demo

It will generate a demo rail project. Check if the environment is set up or not. Use the following command to run WEBrick web server on your machine.

It will generate auto-code to start the server

Rails server

Now open your browser and type the following -

http://localhost:3000

If everything is fine, it will display a message as “Welcome aboard” or “Congratulations”.

Rails welcome

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