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Adding Authentication with Devise and set up Devise, including generating a Devise User model class (as depicted in Figure 5) along with the sign-up and sign-in pages. Create the sign-in/sign-out/sign-up hyperlinks. Restrict access to controller actions to only users who are signed in.

Devise is an excellent authentication system made for Rails that allows us to easily drop-in User functionality into our project. Add Devise to your Gemfile and run bundle .

In this article, we will look at the steps needed to integrate Devise into a Ruby on Rails application. Step 1: Add Devise to the Gemfile. ... Step 2: Run Devise Generator. ... Step 3: Generate Devise Models. ... Step 4: Update Routes. ... Step 5: Add Devise Views. ... Step 6: Update Application Controller.

By default, the use of Devise doesn't enforce strong passwords. The good thing about the gem is that it doesn't store the password ? just an encrypted hash ? but that still allows users to create passwords like '123456' or 'password'.

Devise is a flexible authentication solution for Rails based on Warden.

A device is a complete piece of physical hardware that is used to compute or support computer functions within a larger system. Some devices, such as peripheral devices, are auxiliary in nature and can provide an input, output, or both to a computer.

Devise offers authentication helper functions for Rails controllers and views. They include: authenticate_user! : This helper function denies controller access to unauthenticated users. user_signed_in? : This returns a boolean that indicates whether or not a user is signed in.

The Devise gem is an authentication solution for Ruby on Rails applications; it helps you set up production-ready user authentication in your projects without having to do everything on your own.