php - Circular Reference on preFlush -

i'm having trouble dependency injection. i'm trying save record db in preflush listener. i'm saving record db via own service ( custom logging service ). i've tried few ways none working, i've tried every google / stackover flow result i've found no luck yet i'm afraid.

here's setup logger class, private variables have been ommitted set ( use request stack , translator else in class, wasn't sure if should ommit question ):

config:

core.logger:     class: xxx\corebundle\logger     arguments: [@request_stack, @doctrine.orm.entity_manager, @translator] 

class:

public function __construct(requeststack $requeststack, entitymanager $em, translatorinterface $t)     {         $this->requeststack = $requeststack;         $this->em = $em         $this->t = $t;     } public function addlogentitychange($uow, $entity) {         $changeset = $uow->getentitychangeset($entity);         foreach($changeset $key => $value) {             $logentity = new log();             //setstuff..             $this->em->persist($logentity);         }         $this->em->flush();     } 

and here's interface code

config:

xxxcore.loggerlistener:   class: xxx\corebundle\listener\loggerlistener   calls:     - [ setlogger, [@core.logger] ]   tags:     - { name: doctrine.event_listener, event: preflush } 

interface:

    public function setlogger($logger)     {         $this->l = $logger;     }     public function preflush(preflusheventargs $args)     {         $em = $args->getentitymanager();         $uow = $em->getunitofwork();         $uow->computechangesets();          foreach ($uow->getscheduledentityupdates() $entity) {             if($entity instanceof loggerinterface) {                 $this->l->addlogentitychange($uow, $entity);             }          }     } 

this leads the

circular reference detected service "doctrine.dbal.xxx_connection", path: "doctrine.dbal.xxx_connection". 

i've tried setting entity manager in logger class manually, removing dependancy injection , using setentitymanager function timesout page. i've tried inserting service_container didnt either.

when calling functions manually after persist entity works, automate via interface preflush listener.

any / insight appreciated!

interesting. has come before: symfony circular reference exception doctrine onflush event listener service

somewhere in doctrine tagging process there must compiler pass injecting listeners entity manager , causing circular reference.

i checked doctrinebundle code , yep, entity manager dependent on it's listeners , of course if listener dependent on entity manager circular reference.

i duplicated problem with:

## services.yml cerad_project_level_logger:   class: cerad\projectlevel\levellogger   arguments:     # - '@doctrine.orm.entity_manager'  cerad_project_level_listener:   class: cerad\projectlevel\levellistener   arguments:     - '@cerad_project_level_logger'   tags:     - { name: doctrine.event_listener, event: preflush } 

the work around pass entity manager in logger method instead of injecting it.

    foreach ($uow->getscheduledentityupdates() $entity) {         if($entity instanceof loggerinterface) {             $this->l->addlogentitychange($em, $uow, $entity);         } 

i'm confident code still not work intended since preflush called after em->flush , end in loop @ least past circular reference error.

all these problems go away if make logger entity manager. besides, want log production database?