在本地调试Firebase功能(node.js) [英] Debugging Firebase functions locally (node.js)

问题描述

下面看到我的代码非常简单....它侦听实时数据库中数据库字段的更改.

see below my code is very simple....it listens to a change on a database field in realtime-database.

const functions = require("firebase-functions");
var admin = require("firebase-admin");

exports.onActiveUpdate = functions.database
  .ref("/profiles/users/{userId}/active")
  .onUpdate((change, context) => {
      //code here

    return true;
  });

我尝试使用以下命令在本地调试代码

Ive tried to debug code locally with the following commands

firebase serve --only functions
firebase serve
firebase emulators:start

我总是收到相同的消息...

I always get the same message...

+  functions: Emulator started at http://localhost:5001
i  functions: Watching "C:\code\rn\xs\fb_functions\functions" for Cloud Functions...
i  functions[onActiveUpdate]: function ignored because the database emulator does not exist or is not running.
+  All emulators started, it is now safe to connect.

但是当我进入localhost:5001时....我看到的是空白页，顶部是 {"status":"alive"} .

But then when I go to localhost:5001....all I see is a blank page with with {"status":"alive"} at the top.

这是正确的行为吗?谢谢

Is this correct behavior? Thanks

推荐答案

您可以通过运行以下命令在检查模式下运行模拟器:

you can run the emulator in inspect mode by running :

firebase emulators:start --inspect-functions

查看它正在侦听调试客户端的端口(例如端口9229).如果您使用的是VSCode，则在.vscode子目录

see what port it is listening for debug client (e.g. port 9229 ). if you are using VSCode have launch.json inside .vscode subdir

{
"configurations": [
    {   "type": "node",
        "request": "attach",
        "name": "Debug",
        "port": 9229
    }
]

}然后只需单击VScode中的调试"图标即可连接到正在运行的进程.现在在您的函数代码中添加一些断点，并通过浏览器调用它们.

} then simply click on Debug icon in your VScode to connect to running process. now put some break point in your functions code and invoke them through browser.

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