Firebase 模拟器 : datasnapshot. ref 抛出 "Cannot parse Firebase url..."

Question

背景

我有一个已在 firebase 实时环境中成功运行的应用程序，但是当我尝试在本地模拟器设置上运行它时，它失败了。

步骤

1. 运行 firebase emulators:start --only functions,database，使用以下 firebase.json 配置:

{
  "functions": {
    "source": "functions"
  },
  "emulators": {
    "functions": {
      "port": 5001
    },
    "ui": {
      "enabled": true
    },
    "database": {
      "port": 9000
    }
  },
  "database": {
    "rules": "database.rules.json"
  }
}

2:打开模拟器UI，切换到“Realtime Database”选项卡，在schema中，创建一个“congregations”子节点，然后向其中添加一些子数据，例如:

{
  "congregationName": "My Congregation",
  "email": "test@test.com",
  "newEventData": {"capacity":123,"eventName":"My Event"}
}

1. 观察...

脚本(我将在下面粘贴)然后应该获取数据并进行一些进一步的处理、编辑和写入一些额外的数据。这在实时设置上运行良好，但在本地模拟器上没有任何反应，相反，我看到我的 firebase 终端出现错误。

代码+错误

我已经去掉了糟粕并将函数简化为仅包含错误代码:

exports.addCongregation = functions.database
  .ref("/congregations/{congregationId}")
  .onCreate(async (snap, context) => {    
    console.log(snap.val()); // runs fine, displays the entered data
    console.low(snap.ref); // throws an error without logging anything else
  });

• console.log(snap.val()) 将按预期输出我在步骤 2 中输入的示例数据。
• console.log(snap.ref) 不会向终端输出任何内容，除了抛出以下错误，堆栈跟踪指向 snap.ref 被称为:

!  functions: Your GOOGLE_APPLICATION_CREDENTIALS environment variable points to GAC-staging.key.json. Non-emulated services will access production using these credentials. Be careful!
i  functions: Beginning execution of "addCongregation"
>  { congregationName: 'My Congregation',
>    email: 'test@test.com',
>    newEventData: { capacity: 123, eventName: 'My Event' } }
>  [2020-06-10T18:38:45.980Z]  @firebase/database: FIREBASE FATAL ERROR: Cannot parse Firebase url. Please use https://<YOUR FIREBASE>.firebaseio.com
!  functions: Error: FIREBASE FATAL ERROR: Cannot parse Firebase url. Please use https://<YOUR FIREBASE>.firebaseio.com
    at fatal (C:\Users\Me\Projects\Web-Dev\prayin.io\functions\node_modules\@firebase\database\dist\index.node.cjs.js:341:11)
    at parseRepoInfo (C:\Users\Me\Projects\Web-Dev\prayin.io\functions\node_modules\@firebase\database\dist\index.node.cjs.js:1295:9)
    at RepoManager.databaseFromApp (C:\Users\Me\Projects\Web-Dev\prayin.io\functions\node_modules\@firebase\database\dist\index.node.cjs.js:14986:25)
    at Object.initStandalone (C:\Users\Me\Projects\Web-Dev\prayin.io\functions\node_modules\@firebase\database\dist\index.node.cjs.js:15377:45)
    at DatabaseService.getDatabase (C:\Users\Me\Projects\Web-Dev\prayin.io\functions\node_modules\firebase-admin\lib\database\database.js:66:23)
    at FirebaseApp.database (C:\Users\Me\Projects\Web-Dev\prayin.io\functions\node_modules\firebase-admin\lib\firebase-app.js:231:24)
    at DataSnapshot.get ref [as ref] (C:\Users\Me\Projects\Web-Dev\prayin.io\functions\node_modules\firebase-functions\lib\providers\database.js:279:34)
    at exports.addCongregation.functions.database.ref.onCreate (C:\Users\Me\Projects\Web-Dev\prayin.io\functions\index.js:86:22)
    at cloudFunction (C:\Users\Me\Projects\Web-Dev\prayin.io\functions\node_modules\firebase-functions\lib\cloud-functions.js:132:23)
    at runFunction (c:\Users\Me\AppData\Local\Yarn\Data\global\node_modules\firebase-tools\lib\emulator\functionsEmulatorRuntime.js:553:20)
!  Your function was killed because it raised an unhandled error.

我不知道为什么会这样，特别是考虑到我只在本地模拟器上遇到问题。任何帮助将非常感激。对于它的值(value)，实时数据库选项卡顶部显示的 URL 是 http://localhost:9000/，这是有道理的，我不确定它与预期的 x 有何关系。 firebaseio.com 网址。

Answer 1

您似乎在 firebase-functions SDK 中发现了错误。我遇到了同样的事情并看到了您的帖子，以及他们存储库中的未解决问题。

https://github.com/firebase/firebase-functions/issues/726

听起来 bug 的来源已经确定，他们正在修复。

来自 firebase 的 samtstern:

We are working on a fix. The issue is with change.after.ref, and the workaround is to build your own ref to the document inside the function using admin.database().ref()...