Firebase云消息传递-调用firebase.messaging（）时出错

Question

I am getting an error when calling firebase.messaging() from the html page (not the service worker) that makes no sense. 从html页面（不是服务工作者）调用firebase.messaging()时出现错误，这没有任何意义。

Messaging: Please ensure that 'messagingSenderId' is set correctly in the options passed into firebase.initializeApp(). 消息传递：请确保在传递给firebase.initializeApp（）的选项中正确设置了“ messagingSenderId”。 (messaging/bad-sender-id). （消息/坏发送者ID）。

The app IS initialized with the correct messagingSenderId in a <script> further up in the <head> . 应用程序是用正确的初始化messagingSenderId在一个<script>进一步向上在<head> The default app is shown in the console log: 默认应用程序显示在控制台日志中：

function deviceRegistration() {
    console.log('in deviceRegistration()');
    console.log("firebase.apps:", firebase.apps);
    console.log("firebase.apps.length: ", firebase.apps.length);
    if (firebase.apps.length == 0) {
        // firebase.initializeApp({{ fcm_config.messagingSenderId }});
        firebase.initializeApp({"messagingSenderId": "1234567890"});
    }
    console.log("after initializeApp");  // prints to console
    var messaging = firebase.messaging();  // error happens here
    console.log("after firebase.messaging()");  // doesn't print to console

The reason I only call firebase.initializeApp if there are no apps in firebase.apps is because when I call firebase.initializeApp without first performing this check I get the following error: 如果在firebase.apps中没有应用程序，我之所以只调用firebase.initializeApp ，是因为当我在不首先执行此检查的情况下调用firebase.initializeApp时，出现以下错误：

Firebase: Firebase App named '[DEFAULT]' already exists (app/duplicate-app). Firebase：名为“ [DEFAULT]”的Firebase应用已存在（应用/重复应用）。

I thought I'm supposed to be able to call initializeApp repeatedly (on every page) and it would register the service worker if necessary... 我以为我应该能够（在每个页面上）重复调用initializeApp并且如果需要的话，它将注册服务工作者。

Can someone please help me figure out what's going on? 有人可以帮我弄清楚发生了什么吗？

Answer 1

Oh silly me... 噢，愚蠢的我...

I populated the config variable with a (django) template tag and context variable that I incorrectly referenced. 我用（django）模板标记和错误引用的上下文变量填充config变量。 I did this: 我这样做：

var config = {
    apiKey: "{{ fcm_config.apiKey }}",
    authDomain: "{{ fcm_config.authDomain }}",
    databaseURL: "{{ fcm_config.databaseURL }}",
    projectId: "{{ fcm_config.projectId }}",
    storageBucket: "{{ fcm_config.storageBucket }}",
    messagingSenderId: "{{ fcm_config.messagingSenderId }}"
};
firebase.initializeApp(config);

When I meant to do this: 当我打算这样做时：

var config = {
    apiKey: "{{ fcm_config.config.apiKey }}",
    authDomain: "{{ fcm_config.config.authDomain }}",
    databaseURL: "{{ fcm_config.config.databaseURL }}",
    projectId: "{{ fcm_config.config.projectId }}",
    storageBucket: "{{ fcm_config.config.storageBucket }}",
    messagingSenderId: "{{ fcm_config.config.messagingSenderId }}"
};
firebase.initializeApp(config);

So firebase was right to complain about a bad sender ID, since I was passing in an object equivalent to: 因此，firebase抱怨发件人ID错误是正确的，因为我传入的对象等同于：

firebase.initializeApp({
    apiKey: "",
    authDomain: "",
    databaseURL: "",
    projectId: "",
    storageBucket: "",
    messagingSenderId: ""
});

Now that part works and I'm on to the next error! 现在这部分工作了，我继续下一个错误！

(if you're wondering why I put those variables in fcm_config.config.* , which seems redundantly redundant, it's because I also store fcm_config.VAPID ) （如果您想知道为什么将这些变量放在fcm_config.config.* ，这似乎是多余的，那是因为我还存储了fcm_config.VAPID ）

Firebase云消息传递-调用firebase.messaging（）时出错

问题描述

1 个解决方案

解决方案1
0 已采纳 2018-07-11 21:18:57

Firebase云消息传递-调用firebase.messaging（）时出错

问题描述

1 个解决方案

解决方案1 0 已采纳 2018-07-11 21:18:57

解决方案1
0 已采纳 2018-07-11 21:18:57