public function belongsTo($model, $foreignKey = '', $otherKey = '', $alias = [], $joinType = 'INNER')
{
// 记录当前关联信息
$model = $this->parseModel($model);
$foreignKey = $foreignKey ?: Loader::parseName(basename(str_replace('\\', '/', $model))) . '_id';
$otherKey = $otherKey ?: (new $model())->getPk();
return $this->relation()->belongsTo($model, $foreignKey, $otherKey, $alias, $joinType);
}