更新 Firestore 文档中嵌套对象中的字段? [英] Update fields in nested objects in firestore documents?

问题描述

我有一个数据结构，如:

我想编辑first"对象中test"键的值.我遵循了

test2"键不见了.但是，我只想更新test"的值并保留test2".

这个问题有什么解决方案吗?

解决方案

根据你提供的链接，它是这样写的:

<块引用>

如果您的文档包含嵌套对象，您可以在调用 update() 时使用点表示法"来引用文档中的嵌套字段:

因此你需要使用dot notation才能只更新一个字段而不覆盖，就像这样:

var setAda = dbFirestore.collection('users').doc('alovelace').update({"first.test": "12345"});

那么你将拥有:

 首先测试:12345"测试2:abcd"

I have a data structure like:

I want to edit the value of "test" key in "first" object. I followed the document on https://firebase.google.com/docs/firestore/manage-data/add-data

But it did not work for me.

The nodejs code:

var setAda = dbFirestore.collection('users').doc('alovelace').update({
        first : {
            test: "12345"
            }
});

The result in firestore:

The "test2" key was gone. However, I only want to update the value of "test" and keep the "test2".

Any solution for this problem?

解决方案

According to the link you provided, it says this:

If your document contains nested objects, you can use "dot notation" to reference nested fields within the document when you call update():

Therefore you need to use dot notation to be able to update only one field without overwriting, so like this:

var setAda = dbFirestore.collection('users').doc('alovelace').update({
    "first.test": "12345"
});

then you will have:

 first
  test: "12345"
  test2: "abcd"

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