如何在Firebase本地仿真器上将辅助数据库实例与实时数据库触发器/云功能一起使用？

Question

我正在尝试在本地Firebase模拟器上的辅助数据库实例上运行实时数据库触发器。我遵循以下示例：

• How do I setup firebase realtime DB triggers for multiple databases using cloud functions?
• https://firebase.google.com/docs/database/extend-with-functions#specify_the_instance_and_path

通过在instance(dbInstanceId)之后指定functions.database。

---

我的函数的 package.json ：

  "engines": {
    "node": "10"
  },
  "main": "lib/index.js",
  "dependencies": {
    "firebase-admin": "^9.0.0",
    "firebase-functions": "^3.8.0"
  },

Firebase版本：

$ firebase --version
8.6.0

lib / index.ts

import * as functions from 'firebase-functions';
import * as admin from 'firebase-admin';

admin.initializeApp();

const defaultDb = admin.database();

// default instance name is 'sgo-personal'
export const onStaffCreatedDefault = functions.database
  .ref('/staff/{name}')
  .onCreate(async (snapshot, context) => {
    defaultDb.ref('/meta/defaultDbCount').set(admin.database.ServerValue.increment(1));
    console.log("Hello from default instance DB");
    return null;
  });

export const onStaffCreatedDb1 = functions.database.instance('db1')
  .ref('/staff/{name}')
  .onCreate(async (snapshot, context) => {
    defaultDb.ref('/meta/db1Count').set(admin.database.ServerValue.increment(1));
    console.log("Hello from DB1");
    return null;
  });

export const onStaffCreatedDb2 = functions.database.instance('db2')
  .ref('/staff/{name}')
  .onCreate(async (snapshot, context) => {
    defaultDb.ref('/meta/db2Count').set(admin.database.ServerValue.increment(1));
    console.log("Hello from DB2");
    return null;
  });

---

问题：当我在辅助数据库实例上添加数据时，它不会触发任何操作。这是本地模拟器的限制吗？

如果我在db1或db2实例上添加人员，则不会打印日志。

但是，如果我在默认实例中添加人员，则所有会根据日志触发云功能：

i  functions: Beginning execution of "onStaffCreatedDefault"
i  functions: Beginning execution of "onStaffCreatedDb2"
>  Hello from default instance DB
i  functions: Finished "onStaffCreatedDefault" in ~1s
i  functions: Beginning execution of "onStaffCreatedDb1"
i  functions: Finished "onStaffCreatedDb1" in ~1s
>  Hello from DB2
>  Hello from DB1
i  functions: Finished "onStaffCreatedDb2" in ~1s

附加的屏幕截图：Firebase Emulator UI

我希望在/sgo-personal/meta/db2Count中添加2条记录后，2将是db2。