app/controllers/application_controller.rb
class ApplicationController < ActionController::Base
# Prevent CSRF attacks by raising an exception.
# For APIs, you may want to use :null_session instead.
protect_from_forgery with: :exception
before_action :tweet_service
private
def tweet_service
@service ||= TweetService.new(current_user).tap do |service|
current_user.subscribe(service) if current_user
end
end
end