Firebase发生任何变化时，自动向所有用户发送通知 [英] Automatically send notification to all the users whenever there is any change in firebase

问题描述

在Firebase中进行更改时，如何通知所有用户?我不希望手动执行此操作.

How do I notify all users when a change is made in firebase? I do not wish to do this manually.

推荐答案

您应该使用由实时数据库触发器触发的Firebase云功能，请参阅doc 此处.查看Cloud功能的官方Firebase示例之一:

You should use a Firebase Cloud Function tiggered by a Realtime Database trigger, see doc here. Have a look at one of the official Firebase samples for Cloud Functions:

此示例演示了如何发送Firebase Cloud Messaging(FCM)实时数据库触发功能的通知.样品还具有可体验FCM通知的Web UI.

This sample demonstrates how to send a Firebase Cloud Messaging (FCM) notification from a Realtime Database triggered Function. The sample also features a Web UI to experience the FCM notification.

https://github.com/firebase/functions-samples/tree/master/fcm-notifications

如果您想发送电子邮件，请查看以下示例:

If you prefer to send an email, look at the following sample:

https://github.com/firebase/functions-samples/树/主/电子邮件确认

此样本显示了如何向订阅/取消订阅时事通讯的用户发送确认电子邮件".当用户在特定的实时数据库"节点下写入一些数据时，将触发该事件.因此，这与您的情况非常相似:在给定的DB节点下写入新数据时，将发送邮件.

This samples "shows how to send a confirmation emails to users who are subscribing/un-subscribing to a newsletter". It is triggered when a user write some data under as specific Real Time Database node. So it is very similar to your case: when new data is written under a given DB node, the mail is sent.

您也可以对其进行修改以使其使用Sengrid，以及其用于node.js的库 https://github.com/sendgrid/sendgrid-nodejs .它效果很好，也是Firebase推荐的解决方案.

You can also adapt it in order to use Sengrid, with their library for node.js https://github.com/sendgrid/sendgrid-nodejs. It works very well and is also a recommended solution by Firebase.

如果在将这些样本之一适合您的情况时遇到困难，请毫不犹豫地分享您的代码并寻求帮助.

In case you encounter difficulties when adapting one of these samples to your case, do not hesitate to share your code and ask for help.

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