如何在`beforeSave`云函数中取消嵌套属性的设置？

Question

我已经扩展了Parse.Object。现在，我想在保存对象之前取消设置嵌套属性。所以我的钩子看起来像这样：

Parse.Cloud.beforeSave('MyObject', req => {
   if (req.object.get('settings').propertyToUnset) {
       req.object.unset('settings.propertyToUnset');
   }
});

但是，会产生错误Error [ERR_HTTP_HEADERS_SENT]: Cannot set headers after they are sent to the client

unset如何用于嵌套属性？

Answer 1

您可以尝试这样的事情：

Parse.Cloud.beforeSave('MyObject', async req => {
   const settings = req.object.get('settings');
   await settings.fetch();
   if (settings.get('propertyToUnset')) {
       settings.unset('propertyToUnset');
       await settings.save();
   }
});