/**
* 添加一个可被引入的项.
*
* @param Includable $includable
*
* @throws Exception
*/
public function add(Includable $includable)
{
if ($includable->isNested()) {
$parent_includable = $this->getIncludable($includable->getParentName());
if (null === $parent_includable) {
throw new Exception('You must define includable ' . $includable->getParentName());
}
$parent_includable->addChildren($includable);
}
$this->available_includes[$includable->getName()] = $includable;
$this->foreign_keys[$includable->getName()] = $includable->getForeignKey();
}
