How can I implement authentication in my Rails app using Devise and OmniAuth?

How can I implement authentication in my Rails app using Devise and OmniAuth?

To implement authentication in your Rails app using Devise and OmniAuth, first, add the Devise gem to your Gemfile and run the bundle command. Then, set up Devise by running the generator and migrating the database.

What are the steps to configure OmniAuth with Devise?

After setting up Devise, you need to add the OmniAuth gem to your Gemfile. Then, configure OmniAuth in your Devise initializer by specifying the provider you want to use, like Google or Facebook.

Can you show me an example of the configuration?

Sure! In your config/initializers/devise.rb, you can add:

config.omniauth :google_oauth2, 'GOOGLE_CLIENT_ID', 'GOOGLE_CLIENT_SECRET'

Make sure to replace the placeholders with your actual credentials.

How do I handle the callback from OmniAuth?

You need to create a callback route in your routes file and define a method in your controller to handle the response from OmniAuth. This method will find or create the user based on the information returned.