app/controllers/users/omniauth_callbacks_controller.rb
class Users::OmniauthCallbacksController < Devise::OmniauthCallbacksController
# You should configure your model like this:
# devise :omniauthable, omniauth_providers: [:twitter]
# You should also create an action method in this controller like this:
# def twitter
# end
# More info at:
# https://github.com/plataformatec/devise#omniauth
# GET|POST /resource/auth/twitter
# def passthru
# super
# end
# GET|POST /users/auth/twitter/callback
# def failure
# super
# end
# protected
# The path used when OmniAuth fails
# def after_omniauth_failure_path_for(scope)
# super(scope)
# end
def self.provides_callback_for(provider)
class_eval %Q{
def #{provider}
@user = User.find_for_oauth(env["omniauth.auth"], current_user)
if @user.persisted?
sign_in_and_redirect @user, event: :authentication
set_flash_message(:notice, :success, kind: "#{provider}".capitalize) if is_navigational_format?
else
session["devise.#{provider}_data"] = env["omniauth.auth"]
redirect_to new_user_registration_url
end
end
}
end
[:facebook, :google_oauth2].each do |provider|
provides_callback_for provider
end
end