Autoload Model data

application_controller.rb

class ApplicationController
 include ResourceModel
end

resource_model.rb

module ResourceModel
    extend ActiveSupport::Concern
    
    module ClassMethods
        def resource
            model_class = self.name.sub(/Controller/, '').singularize
            model_class.constantize
        end
    end

    module InstanceMethods
        def find_all
            working_resource = Kernel.const_get(self.class.resource.to_s)
            values = working_resource.send :all
            instance_variable_set("@#{self.class.resource.to_s.downcase.pluralize}", values)
        end
    end
end

users_controller.rb

class UsersController << ApplicationController
    def index
        find_all
        puts @users
    end
end