使用 mongoose 将 mongo 对象的字段设置为空 [英] set field as empty for mongo object using mongoose

问题描述

我在一个对象上调用 user.save()，在那里我设置了 user.signup_date = null;

I'm calling user.save() on an object, where I set user.signup_date = null;

user.first_name = null;
user.signup_date = null;

user.save();

但是当我查看 mongodb 中的用户时，它仍然设置了 signup_date 和 first_name...如何有效地将此字段设置为空或空?

But when I look at the user in the mongodb it still has the signup_date and first_name set...how do I effectively set this field as empty or null?

推荐答案

要从现有文档中删除这些属性，请在保存之前将它们设置为 undefined 而不是 null文档:

To remove those properties from your existing doc, set them to undefined instead of null before saving the doc:

user.first_name = undefined;
user.signup_date = undefined;

user.save();

已确认仍在 Mongoose 5.9.7 中工作.请注意，您要删除的字段仍必须在您的架构中定义才能使其正常工作.

Confirmed as still working in Mongoose 5.9.7. Note that the field you're trying to remove must still be defined in your schema for this to work.

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