title: How to make a Polymer CRUD app?
body: <p>Does anyone know any example/tutorial of Polymer using core-ajax and ajax-form to build a CRUD application?</p>
  
  <p>My main question is how to structure the app (best practices) to focus data access in "modules" (custom elements) like in Angular services.</p>
  
  <p>Should I use a unique core-ajax by "module" for example and change this attributes (like url and method) in javascript or put multiple core-ajax in template? I know this is maybe a personal choice, but if an idea for this already exists I would follow it.</p>
  
  <p>Thanks</p>