/**
* Checks whether the unique constraint is valid for a many-to-many field.
*
* @param array $value
* the value to check
* @param AbstractData $data
* the data to perform the check with
* @param Entity $entity
* the entity to perform the check on
* @param $field
* the many field to perform the check on
*
* @return boolean
* true if it is a valid unique many-to-many constraint
*/
protected function isValidUniqueMany(array $value, AbstractData $data, Entity $entity, $field)
{
return !$data->hasManySet($field, array_column($value, 'id'), $entity->get('id'));
}
