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