title: On Sorting Error Coming in Sonata Admin Symfony
body: <p>Try to do sorting using translations, have multiple entries in translation table with different languagecode and i am showing only one language code on listmapper.</p>
  
  <p>I try todo sorting with it but error comes :</p>
  
  <blockquote>
    <p>Type error: Argument 1 passed to Sonata\DoctrineORMAdminBundle\Datagrid\ProxyQuery::entityJoin() must be of the type array, null given, called in D:\software\xampp\htdocs\meopin_2\trunk\vendor\sonata-project\doctrine-orm-admin-bundle\Datagrid\ProxyQuery.php</p>
  </blockquote>
  
  <p>Can anyone help me in this ?</p>
  
  <p>Thanks in advance</p>