Firestore:在添加/更新文档后取回文档，而无需其他网络调用 [英] Firestore: get document back after adding it / updating it without additional network calls

问题描述

是否可以在添加文件/更新文件后使用Firestore像MongoDB一样取回文件，而无需进行额外的网络调用?

Is it possible to get document back after adding it / updating it without additional network calls with Firestore, similar to MongoDB?

我觉得先打个电话来添加/更新文档，然后再打个电话来获取它是愚蠢的.

I find it stupid to first make a call to add / update a document and then make an additional call to get it.

推荐答案

正如您可能在Node.js(和Javascript)SDK文档中所看到的那样，这是不可能的，而且 DocumentReference 或

As you have probably seen in the documentation of the Node.js (and Javascript) SDKs, this is not possible, neither with the methods of a DocumentReference nor with the one of a CollectionReference.

更准确地说， set() 和 update() 方法="https://firebase.google.com/docs/reference/js/firebase.firestore.DocumentReference" rel ="nofollow noreferrer"> DocumentReference 都返回一个包含void的Promise，而 CollectionReference 的

More precisely, the set() and update() methods of a DocumentReference both return a Promise containing void, while the CollectionReference's add() method returns a Promise containing a DocumentReference.

旁注(与以下darrinm的回答一致):有趣的是，使用创建文档，您会返回(即通过API端点响应)

Side Note (in line with answer from darrinm below): It is interesting to note that with the Firestore REST API, when you create a document, you get back (i.e. through the API endpoint response) a Document object.

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