firestore - 收听整个收藏的更新

问题描述

我正在使用 google 的 firestore，我想获得整个集合的实时更新.

I'm using google's firestore and I want to get a live update on the entire collection.

我在文档中看到了这一点:https://cloud.google.com/nodejs/docs/reference/firestore/0.11.x/CollectionReference#onSnapshot

I saw this in the documents:https://cloud.google.com/nodejs/docs/reference/firestore/0.11.x/CollectionReference#onSnapshot

但据我所知，我必须获取一个文档或查询一系列文档.

but as far as I understood I have to get a document or to query a range of documents.

如何监听整个集合的变化?

how can I listen to changes in the entire collection?

推荐答案

如果您参考 收听集合中的多个文档 文档，只需省略 where 过滤器，您就应该获得整个集合.

If you refer back to the Listen to multiple documents in a collection documentation, simply omit the where filter and you should get the whole collection.

第一行看起来像这样:var query = db.collection("cities");

这篇关于firestore - 收听整个收藏的更新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！