How To Implement Devise Gem In Rails Application

How To Implement Devise Gem In Rails Application

18 May 2021
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How To Implement Devise Gem In Rails Application

 

What is Devise Gem?

Devise Gem is a flexible user authentication used in Ruby on Rails-based applications. In this blog, we will understand how to set up a Devise in the web app, for the user to add user registration, login, and logout.

 

The need for migration:

Devise is the foundation gem for Ruby on Rails authentication. Devise is utilized to create a user for easy login and out from the application. The migration process is simple as devise takes care of all the controllers necessary for user creation (users_controller) and for user sessions (users_sessions_controller)

 

Technologies:

  • Ruby on Rails
  • MVC Framework

 

Let's understand the required steps to apply Devise in Rails application.

 

Step 1: Create a new Rails application (rails new devise_gem)

 

Step 2: Add Devise to the Gem file.

 

Step 3: Run bundle installs on the terminal.

 

Step 4:  Run the below command on the terminal.

         

           $ rails generate devise:install.          

 

Step 5: Certain instructions will be displayed on the user console window.

 

Step 6:  Defined root_url to *something* in the config/routes.rb.

 

Step 7:  Copy Devise views (for customization) to the app by running the command.

             

           $ rails g devise:views

 

Step 8: Generate a model or devise model.

 

      $ rails generate devise User

 

Step 9: Before migrating the database, check the migration file.

 

Step 10: Add columns in the devise model.

 

 $ rails generate migration add_name_to_user name:string surname:string

 

Step 11: With the following command start the database migration

 

          $ rails db:create db:migrate db:seed

 

Step 12: After the database migration is complete, check the sign-up form on the application.

          

          $ rails server 

 

Step 13: Go to any internet browser on the computer and enter the address: http://localhost:3000/users/sign_up.

 

Step 14: The sign-up page will look like this.

 

 

                                                                                                       




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