protected function joinHasRelation(Relations\HasOneOrMany $relation, $type)
{
$table = $relation->getRelated()->getTable();
$foreignKey = $relation->getForeignKey();
$localKey = $relation->getQualifiedParentKeyName();
$this->query->join($table, $foreignKey, '=', $localKey, $type);
}
private function generateNullConditionFromHasOneOrMany(HasOneOrMany $relation)
{
$this->query = $this->query->whereNull($relation->getForeignKey());
}
