如何通过获取自动生成的ID来删除Firestore中的文档? [英] How to delete a document in firestore by fetching its autogenerated id?

问题描述

如何在Firestore中删除文档或子文档如何获取其自动生成的ID，以便在用户长按时在列表中的行项目上选择删除"，以便他/她可以轻松地从应用程序的用户界面中删除文档.

How to delete a document or a sub-document in Firestore & how to fetch its auto-generated id so that when the user long presses, selects 'delete' on a row item in the list so that he/she can delete a document from the user interface of the app easily.

推荐答案

现有的随机文档.为了删除文档，您需要执行以下两项操作之一:

You can't "fetch" an existing random document. In order to delete a document you need to do either one of two things:

• 记住客户端上生成的ID，并使用该ID生成DocumetnReference来删除文档
• 使用您在该文档中知道的字段来查询文档，然后在查询后将其删除.或者只是查询所有文档，然后将它们作为一个组进行处理.

如果您无法使用文档的字段查询文档，又不知道文档的ID，则说明您很困惑，您将需要更仔细地考虑数据模型.

If you can't query for a document using its fields, and you don't know it's ID, you're kind of stuck, and you will need to think more carefully about your data model.

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