一次性创建包含子集合的文档 [英] Create doc with subcollection in one shot

问题描述

假设我有一个名为 root 的集合

Let's say I have collection called root

我可以在一次调用中创建包含其子集合的文档吗?

Can I create document with its subcollection in one call?

我的意思是如果我这样做:

I mean if I do:

db.Collection("root").document("doc1").Collection("sub").document("doc11").Set(data) 

那会一次性创建结构吗?老实说，我试了一下，doc1 有一个斜体标题，我认为它只适用于已删除的文档

Then will that create the structure in one shot? To be honest I gave this a try and doc1 had an italics heading which I thought only for deleted docs

推荐答案

您共享的代码不会创建实际文档.它只是在 root 中保留"文档的 ID，然后在其下创建一个带有实际 doc11 文档的 sub 集合.

The code you shared doesn't create an actual document. It merely "reserves" the ID for a document in root and then creates a sub collection under it with an actual doc11 document.

在 Firestore 控制台中看到斜体文档名称表示该位置没有物理文档，但该位置下有数据.当您删除以前存在的文档时，这是最典型的情况，但您的代码是另一种实现相同功能的方式.

Seeing a document name in italics in the Firestore console indicates that there is no physical document at a location, but that there is data under the location. This is most typical when you've deleted a document that previously existed, but your code is another way accomplishing the same.

无法在一次调用中创建两个文档，尽管您可以在一个 transaction 或 批量写入.

There is no way to create two documents in one call, although you can create multiple documents in a single transaction or batch write if you want.

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