How to Use Sessions in Ruby on Rails

09/19/2021

Contents

In this article, you will learn how to use sessions in Ruby on Rails.

Using sessions

Sessions in Ruby on Rails are used to store user-specific information across multiple requests. Here are the steps to use sessions in Ruby on Rails:

  • Enable sessions in your application by adding the following line to config/application.rb:

    config.middleware.use ActionDispatch::Session::CookieStore

    This line tells Rails to use a cookie-based session store.

  • Set a value in the session using the session method. For example:

    session[:user_id] = 1

    This will set the user_id key in the session to 1.

  • Retrieve a value from the session using the session method. For example:

    user_id = session[:user_id]

    This will retrieve the value of the user_id key from the session.

  • Remove a value from the session using the session method. For example:

    session.delete(:user_id)

    This will remove the user_id key from the session.

You can also use the flash method to store temporary data in the session that is available for the next request only. For example:

flash[:notice] = "Your changes have been saved."

This will set the notice key in the flash, which will be available in the next request.

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