/**
* Merge this operation with a previous operation and return the new
* operation.
*
* @param FieldOperation $previous Previous operation.
*
* @return FieldOperation Merged operation result.
*
* @throws \Exception
*/
public function _mergeWithPrevious($previous)
{
if ($previous == null) {
return $this;
}
if ($previous instanceof AVRelationOperation) {
if ($previous->targetClassName != null && $previous->targetClassName != $this->targetClassName) {
throw new \Exception('Related object object must be of class ' . $this->targetClassName . ', but ' . $previous->targetClassName . ' was passed in.');
}
$newRelationToAdd = self::convertToOneDimensionalArray($this->relationsToAdd);
$newRelationToRemove = self::convertToOneDimensionalArray($this->relationsToRemove);
$previous->addObjects($newRelationToAdd, $previous->relationsToAdd);
$previous->removeObjects($newRelationToAdd, $previous->relationsToRemove);
$previous->removeObjects($newRelationToRemove, $previous->relationsToAdd);
$previous->addObjects($newRelationToRemove, $previous->relationsToRemove);
$newRelationToAdd = self::convertToOneDimensionalArray($previous->relationsToAdd);
$newRelationToRemove = self::convertToOneDimensionalArray($previous->relationsToRemove);
return new AVRelationOperation($newRelationToAdd, $newRelationToRemove);
}
throw new \Exception('Operation is invalid after previous operation.');
}
