How to write Hello World program in Ruby on Rails 5?

• To create a simple Ruby on Rails 5 program displaying Hello World.
• Ruby on Rails 5 program is different from Ruby on Rails 4 program.

Requirements

Text Editor:

• You can utilize any text editor which is suitable for you. We are using Sublime Text editor which features many plugins.

Browser:

• Default browser - Ubuntu,
• Mozilla Firefox.

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Hello World Example

Step 1:

• To Create a directory jtp in which all the code will be present and will navigate from the command line.

mkdir jtp  

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Step 2:

• Change the directory to jtp

cd jtp

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Step 3:

• Create a new application with the name helloWorld.

rails new helloWorld 

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Snapshot

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• A helloWorld directory will be created in your system.
• Inside this folder there will be many files and subfolders which is actually the Rails application.

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Step 4:

• Move in to your above created application directory that is helloWorld.

cd helloWorld  

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Step 5:

• Rails 5 has no longer a static index page in production. There will not be a root page in the production, so we need to create it. First we will create a controller called hello for our home page.

rails generate controller hello  

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Step 6:

• Now we need to add an index page.

• app/views/hello/index.html.erb

<h2>Hello World</h2>  
<p>
Welcome to wikitechy!!
</p> 
<p>   
  Today is 11 Aug, Friday.   
</p>  

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Step 7:

• Now we need to route the Rails to this action. Edit the config/routes.rb file to set the index page to our new method.
• Add the following line in the routes.rb file,

root 'hello#index'  

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Step 8:

• Now you can verify the page by running your server.

rails server

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rails server -p portNumber  

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