/**
* Adds an object to the instance pool.
*
* Propel keeps cached copies of objects in an instance pool when they are retrieved
* from the database. In some cases -- especially when you override doSelect*()
* methods in your stub classes -- you may need to explicitly add objects
* to the cache in order to ensure that the same objects are always returned by doSelect*()
* and retrieveByPK*() calls.
*
* @param Photos $value A Photos object.
* @param string $key (optional) key to use for instance map (for performance boost if key was already calculated externally).
*/
public static function addInstanceToPool(Photos $obj, $key = null)
{
if (Propel::isInstancePoolingEnabled()) {
if ($key === null) {
$key = (string) $obj->getId();
}
// if key === null
self::$instances[$key] = $obj;
}
}