Missing ids when using findOneBy

[johnkrovitch]

When I use the findOneBy method of the finder, I have the following exception :

In ProcessManager.php line 315:
                                                                                                                                      
  Process academic_article has failed during process publication_mapping with message: 'Binding entities to query parameters only al  
  lowed for entities that have an identifier.'.                                                                                       
                                                                                                                                     
In ORMInvalidArgumentException.php line 207:
                                                                                           
  Binding entities to query parameters only allowed for entities that have an identifier.  

But my code looks like this :

if ($author->getId() && $publication->getId()) {
                $publishedPublication = $this->finder->findOneBy($family, [
                    'author' => $author,
                    'publication' => $publication,
                    'type' => $type,
                ]);
            }

And if I dump the content of ids before the crash :

35943
39628
10:46:30 CRITICAL  [cleverage_process_task] Binding entities to query parameters only allowed for entities that have an identifier. ["process_id" => 1574243070.9765,"process_code" => "academic_article","process_context" => [],"task_code" => "publication_mapping","task_service" => "App\Task\Publication\PublicationMappingTask"]
10:46:30 ERROR     [console] Error thrown while running command "cleverage:process:execute academic_article". Message: "Process academic_article has failed during process publication_mapping with message: 'Binding entities to query parameters only allowed for entities that have an identifier.'.
" ["exception" => RuntimeException { …},"command" => "cleverage:process:execute academic_article","message" => "Process academic_article has failed during process publication_mapping with message: 'Binding entities to query parameters only allowed for entities that have an identifier.'.\n"]

The ids of my entities are filled with values.

[johnkrovitch]

It's look like the EAV does not get the ids from entities, but if I pass directly the ids, it is working.

Edit : even with ids, the exception is thrown

[johnkrovitch]

I find some "patch". If we call the find method each linked object before calling the findOneBy, the entity manager is hydrated correctly and the query works.