hasOne(User::class, 'user_id', 'user_id')->field(['user_id','realname','account','avatar']); } public function complaintItem() { return $this->hasOne(ComplaintItem::class, 'id', 'complaint_item_id')->field(['id','level','name']); } public function operation() { return $this->hasOne(Admin::class, 'id', 'operation_id')->field(['id','nickname']); } }