Migrating from Devise to Rodauth, OmniAuth

If you want to read about migrating a basic Rails application from Devise to Rodauth, go to Basics. For an guide about how to migrate RSpec specs, go to RSpec.

If you have followed the basics guide, you should already have removed Devise from your User model (and omniauth with it). This guide explains how to re-add omniauth and add the necessary configuration.

Adding OmniAuth

To add the rodauth-omniauth gem, run bundle add rodauth-omniauth. At the same time, you can remove omniauth-rails_csrf_protection with bundle remove omniauth-rails_csrf_protection, since it is no longer needed.

Create the necessary migrations for Rodauth-OmniAuth. This blog will probably get outdated in the future, so please check the gems documentation to get the latest schema needed. Run the migration.

To enable OmniAuth, modify app/misc/rodauth_main.rb and add OmniAuth to the list of enabled features, and add the omniauth configuration. You can usually copy the configuration from the Devise initializer.

enable :create_account, :verify_account, ...,
+ :omniauth

+ omniauth_provider :facebook, ENV["FACEBOOK_APP_ID"], ENV["FACEBOOK_APP_SECRET"], scope: "email"