如何从Android删除Firestore中集合中的所有文档? [英] How to delete all documents in collection in Firestore from Android?

问题描述

我需要通过单击按钮来删除集合中的所有文档.但是Firestore指南并未说明如何删除所有文件.

I need to delete all documents in collection by clicking a button. But Firestore guide doesn't say how to delete ALL the files.

例如.

          public void onClick(View view) {
//                movieList.clear();
                WriteBatch batch = db.batch();
                Movie movie = new Movie(subj.getText().toString(), cab.getText().toString());
                movieList.add(movie);
                mAdapter.notifyDataSetChanged();
                DocumentReference nycRef = db.collection("Users").document();
                batch.set(nycRef, new Movie(subj.getText().toString(), cab.getText().toString()));
                batch.commit().addOnCompleteListener(new OnCompleteListener<Void>() {
                    @Override
                    public void onComplete(@NonNull Task<Void> task) {


// ...
                    }

这是我的MainActivity文件的一部分.

This is part of my MainActivity file.

添加文件时，它将信息推送到Firestore

When adding a file, it pushes info to Firestore

但是我还需要删除文件(全部)

But I also need to delete files(all)

P.S我收藏的档案总是少于9个

P.S I always have less than 9 files in collection

P.P.S我已经用谷歌搜索了，没有发现.

P.P.S I've googled it, nothing found.

推荐答案

Firestore不提供任何API来删除集合中的所有文档.您要做的就是查询所有文档，收集所有ID，然后编写一些代码以迭代这些ID并删除所有ID.

Firestore doesn't provide any API to delete all documents in a collection. What you'll have to do is query for all the documents, collect all of their IDs, then write some code to iterate those IDs and delete all of them.

这篇关于如何从Android删除Firestore中集合中的所有文档?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！