Foreign key constraint fails because insert statement not yet committed (MySQL)

Question

I have a PHP script using Doctrine 2 which does essentially the following:

$entityManager->transactional(function($em) {
    $foreignObject = new DoctrineEntities\ForeignTable();
    $em->persist($foreignObject);
    $em->flush();
    $aObject = new DoctrineEntities\A();
    $aObject->ForeignID = $foreignObject->ID;
    $em->persist($aObject);
    $em->flush();
});

I'm getting an integrity constraint violation:

a foreign key constraint fails (dbName.A, CONSTRAINT A_ForeignID FOREIGN KEY (ForeignID) REFERENCES ForeignTable ( ID ) ON DELETE NO ACTION ON UPDATE NO ACTION)

My guess is that the constraint is checked before the commit, and it doesn't check to see whether an insert I made that hasn't been committed yet might make the constraint pass rather than fail. But I really do want these two insert statements wrapped in the same transaction. So what can I do?

UPDATE

I moved $em->persist($aObject); $em->flush(); $em->persist($aObject); $em->flush(); out of the transaction and I'm still getting the same error. Apparently, my guess was wrong... But then I really don't know what's causing the error.

---

SQL Context

Table A

CREATE TABLE `A` (
  `ID` int(11) NOT NULL AUTO_INCREMENT,
  `ForeignID` int(11) NOT NULL,
  PRIMARY KEY (`ID`),
  KEY `A_ForeignID` (`ForeignID`),
  CONSTRAINT `A_ForeignID` FOREIGN KEY (`ForeignID`) REFERENCES `ForeignTable` (`ID`) ON DELETE NO ACTION ON UPDATE NO ACTION
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_swedish_ci

Table ForeignTable

CREATE TABLE `ForeignTable` (
  `ID` int(11) NOT NULL AUTO_INCREMENT,
  PRIMARY KEY (`ID`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_swedish_ci

Answer 1

I'd suggest to read about MySQL data integrity and FKs , then Doctrine associations , data integrity is checked by MySQL for InnodDB tables. What you're doing is not right, it should be

$entityManager->transactional(function($em) {
    $foreignObject = new DoctrineEntities\ForeignTable();
    $em->persist($foreignObject);

    $aObject = new DoctrineEntities\A();
    $aObject->setForeign($foreignObject);
    $em->persist($aObject);

    $em->flush();
});

Answer 2

I solved the problem. It was somewhere else completly unrelated to my question.. I'm going to accept getme's answer instead because accepting this answer really won't help anyone else here...