TYPO3.Flow

It's very common to redirect to a details view after creating an entity:

public function createAction(Foo $foo) {
    $this->fooRepository->add($foo);
    $this->redirect('show', NULL, NULL, array('foo' => $foo))
}

But that won't work because the entity is not (yet) known to the Persistence Manager, which is asked for the identity of the object in the Route in order to convert Objects to Identity arrays:

...
if (is_object($routeValue)) {
    $uuid = $this->persistenceManager->getIdentifierByObject($routeValue);

...