如何在Firestore上列出子集合? [英] How to list subcollection on firestore?

问题描述

collection/document/collection/document

user/teamname/username/info

我想列出teamname document的收藏集.我需要收藏集名称.下面的函数返回undefined.

I want to list teamname document's collections.I need collection names. Below functions return undefined.

firestore.collection('user')
.doc('teamname').onSnapshot((data) => { console.log(data) });

firestore.collection('user')
.doc('teamname').get().then((data) => { console.log(data) });

日志:

_data:undefined
_metadata: {}
_ref:{}

推荐答案

无法通过手机/网络检索收藏列表 客户端库.您只应在以下位置查找集合名称: 受信任服务器环境中的管理任务.如果你发现 您需要在移动/网络客户端库中使用此功能，请考虑 重组数据，以便子集合名称是可预测的.

Retrieving a list of collections is not possible with the mobile/web client libraries. You should only look up collection names as part of administrative tasks in trusted server environments. If you find that you need this capability in the mobile/web client libraries, consider restructuring your data so that subcollection names are predictable.

检索子集合的方法仅在服务器库(Java，Nodes.js和Go)上可用.您还无法列出客户端库的子集合.

Methods to retrieve subcollections are only available on server libraries (Java, Nodes.js and Go). You can't yet list subcollections with client libraries.

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