使用node.js从Firestore中的子集合中删除文档 [英] Delete a document from subcollection in Firestore with node.js

问题描述

我想从Firebase子集合中删除文档.我正在尝试通过以下方式做到这一点:

I'd like to remove a document from Firebase sub-collection. I'm trying to do this in the following way:

firestore.collection('categories').doc(categoryId).collection('books').doc(bookId).delete();

它不起作用.

但是，我可以从集合中删除文档:

However, I'm able to remove a document from the collection:

firestore.collection('categories').doc(categoryId).delete();

我看不见东西了吗?应该如何运作?

Am I losing sight of something? How should it work?

已更新:

const firebase = require('../firebase/firebaseAdmin');
const firestore = firebase.firestore();

module.exports = {
  removeBookFromCategory: (categoryId, bookId) => (
    firestore
      .collection('categories')
      .doc(categoryId)
      .collection('books')
      .doc(bookId)
      .delete()
  ),
};

我在这里有正确的ID，但出现500错误:

I have correct ids here but I'm getting 500 error:

错误:参数"documentPath"不是有效的ResourcePath.路径必须是一个非空字符串.

Error: Argument "documentPath" is not a valid ResourcePath. Path must be a non-empty string.

推荐答案

当您删除具有关联子集合的文档时，不会删除这些子集合.仍然可以通过引用访问它们.执行时，

When you delete a document that has associated subcollections, the subcollections are not deleted. They are still accessible by reference. When you execute,

firestore.collection('categories').doc(categoryId).collection('books').doc(bookId).delete();

它将删除该文档.但是它不会删除子集合.如果要删除子集合，则必须手动完成.请在此处

it will delete the document. But it won't delete subcollections. If you want to delete subcollections it has to be done manually. Please refer here

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