public static function queryRelatedItemN(BasicModel $item_m, BasicModel $item_n)
{
$nTableName = $item_n->getTable();
$lTableName = static::getTableName();
$item_m->cache_tags = ['QueryCache-table-' . $lTableName];
return $item_n->select($nTableName . '.*')->join($lTableName, function ($join) use($item_n, $item_m, $nTableName, $lTableName) {
$m = static::$nameM;
$n = static::$nameN;
$join->on("{$lTableName}.{$n}_id", "=", "{$nTableName}." . $item_n->getKeyName())->where("{$lTableName}.{$m}_id", "=", $item_m->getKey())->where("{$lTableName}.{$n}_type", "=", $item_n->getMorphClass())->where("{$lTableName}.{$m}_type", "=", $item_m->getMorphClass());
});
}
