Firebase将消息发送到多个主题 [英] Firebase Send Message to Multiple Topics

问题描述

我一直在尝试向通过API调用订阅多个主题的用户发送云消息(POST

I've been trying to send cloud messages to users who subscribed to multiple topics through an API call (POST https://fcm.googleapis.com/v1/projects/myproject-b5ae1/messages:send) with the following body:

{
  headers: {
    'Content-Type': 'application/json',
    'Authorization': `Bearer MY_ACCESS_TOKEN`
  },
  body: {
    "message": {
      "condition": "'cat' in topics || 'dog' in topics",
      "notification": {
        "title": "Message Title",
        "body": "Message Body" 
      }
    }
  }
}

我根据 FCM文档.我可以收到类似的回复:

I wrote this config according to the FCM documentation. I can get a response similar to this:

{
  "name": "projects/myproject-b5ae1/messages/5735743068807585451"
}

，但任何设备均未收到任何消息.

but no messages were received by any devices.

我已将访问令牌用于其他API，该API可以正常工作.我还知道，FCM文档还为cURL请求提供了不同的正文，我也曾尝试但不起作用.

I've used the access token for other APIs, which works. I'm also aware that the FCM documentation also provided a different body for the cURL request, which I also tried but not working.

奇怪的是，如果我仅在condition中提供一个主题，则实际上已成功将一条消息发送到订阅的设备.我写错什么了吗?

The weird thing is if I only provide one topic in the condition, a message is actually successfully sent to subscribed devices. Am I writing something wrong?

我已经在Stackoverflow上引用了其他解决方案，但是一切仍然不起作用:

I've already referenced other solutions on Stackoverflow but everything is still not working:

具有多个主题的Firebase API调用

Firebase API call with multiple topics in condition

如何将FCM推送通知发送到多个主题

How to send FCM Push Notifications to multiple topics

推荐答案

与Firebase支持人员交谈后，他们指出我遇到的问题是他们仍在尝试解决的已知错误.而且还没有修复的具体时间表.

After talking to Firebase Support, they pointed out the problem I'm having here is a known bug they are still trying to fix. And there's no specific timeline for a fix yet.

因此，我的代码没有问题，如果我真的想使用"||"(OR)运算符，则必须自己解决问题.

Therefore, there's no problem with my code and I'll have to figure out a workaround myself if I really want to use the "||"(OR) operator.

我当前的解决方法是通过数据库跟踪订户(因为Firebase不提供订户查询)，然后通过查找不同主题的订户联合来自己实现OR条件.

My current workaround is keep track of subscribers with a database (since Firebase doesn't offer subscribers querying), then implement the OR condition myself by finding a union of subscribers to different topics.

P.S.我只是不明白为什么要投票，我实际上在这里发现了一个错误，并在提出问题之前引用了我在SO上可以找到的所有解决方案.

P.S. I just don't get why the downvotes, I actually found a bug here and referenced all the solutions I could found on SO before asking the question here.

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