symfony - Relation OneToOne with symfony3/doctrine -

i try create onetoone relation inheritance :

abstract class { } class a1 extends { } class a2 extends { }  class f {     /**      * @orm\onetoone( ? )      */     private $object; // of type a1 or a2 } 

i :

$f = $em->getrepository('mybundle:f')->findexample(); $object = $f->getobject(); // return instance of a1 or a2 

what annotations should used?

if have unidirectional relation, means need f entity containing entity can use unidirectional relation:

class f {      /**       * @orm\onetoone(targetentity="a")       * @orm\joincolumn(name="id_a", referencedcolumnname="id")       */       private $a_object; } 

note relation established a, means object of of a1 or a2. if need bidirectional , them should place annotation in too:

class {      /**      * @onetoone(targetentity="f", mappedby="a_object")      **/     private $f_object; } 

also note can inverse both annotations between f , a, depending of consider main side. check links , links more information.

hope you.