Use Rails plugin generator and adapt

app/controllers/crono/application_controller.rb

@@ -0,0 +1,5 @@
+module Crono
+  class ApplicationController < ActionController::Base
+    protect_from_forgery with: :exception
+  end
+end

app/controllers/crono/jobs_controller.rb

@@ -0,0 +1,11 @@
+module Crono
+  class JobsController < ApplicationController
+    def index
+      @jobs = Crono::CronoJob.all
+    end
+
+    def show
+      @job = Crono::CronoJob.find(params[:id])
+    end
+  end
+end