php - Symfony2 Doctrine one to one mapping -

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so i'm trying make 1 one relationship in symfony2 doctrine i'm getting following error:

an exception has been thrown during rendering of template ("could not resolve type of column "id" of class "intopeople\databasebundle\entity\feedbackcycle"") in intopeopledatabasebundle:feedbackcycle:index.html.twig @ line 65.

i have 2 entities, feedbackcycle , cdp. in feedbackcycle have:

     /**      * @var \intopeople\databasebundle\entity\cdp      *      * @orm\onetoone(targetentity="intopeople\databasebundle\entity\cdp", inversedby="feedbackcycle")      * @orm\joincolumns({      *   @orm\joincolumn(name="cdpid", referencedcolumnname="id")      * })      */     private $cdp;        /**      * set cdp      *      * @param \intopeople\databasebundle\entity\cdp $cdp      *      * @return feedbackcycle      */     public function setcdp(\intopeople\databasebundle\entity\cdp $cdp = null)     {         $this->cdp = $cdp;          return $this;     }      /**      * cdp      *      * @return \intopeople\databasebundle\entity\cdp      */     public function getcdp()     {         return $this->cdp;     }

and in cdp have:

     /**      * @orm\onetoone(targetentity="feedbackcycle")      */     protected $feedbackcycle;       /**      * set feedbackcycle      *      * @param \intopeople\databasebundle\entity\feedbackcycle $feedbackcycle      *      * @return cdp      */     public function setfeedbackcycle(\intopeople\databasebundle\entity\feedbackcycle $feedbackcycle = null)     {         $this->feedbackcycle = $feedbackcycle;          return $this;     }      /**      * feedbackcycle      *      * @return \intopeople\databasebundle\entity\feedbackcycle      */     public function getfeedbackcycle()     {         return $this->feedbackcycle;     }

so in twig can forexample this:

{{ feedbackcycle.cdp.id }}

and work, or can feedbackcycle.name ( attribute ) , work. when 

{{ feedbackcycle.cdp.*another attribute* }}

i error.

solved, forgot write mappedby in cdp:

/**  * @orm\onetoone(targetentity="feedbackcycle", mappedby="cdp")  */ protected $feedbackcycle;

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