title: Amazon Aurora db with Doctrine
body: <p>I need some help, I was working with mysql and doctrine and all was perfect, but now I'm using Auroradb which uses two instances (reader and writer).
  At first I tried to use two entity managers, one for writing and other for reading, but I got a problem with SyliusRbacBundle.</p>
  
  <p>so, is there another way to use aurora and doctrine?????</p>
  
  <p><strong>UPDATE 1</strong></p>
  
  <p>this is the error that I get after using Daniel's config </p>
  
  <blockquote>
    <p>A new entity was found through the relationship 'Litigon\UserBundle\Entity\User#authorizationRoles' that was not configured to cascade persist operations for entity: SuperAdministrador. To solve this issue: Either explicitly call EntityManager#persist() on this unknown entity or configure cascade persist this association in the mapping for example @ManyToOne(..,cascade={"persist"}). </p>
  </blockquote>
  
  <p>so, if I merge the default entity manager as a lot of people suggest, I get problems with aurora 'cause of the other manager is for the reader instance and then when flushing aurora says that isn't allowed to write.</p>