类型错误：无法读取新 DataSnapshot 中未定义的属性“startsWith”

Question

I am trying to write a Cloud Function to listen for Realtime Database triggers with Firebase. But I need to listen for my second database instance but it gives me error like this:

functions: TypeError: Cannot read property 'startsWith' of undefined at new DataSnapshot it just gives this error when my function is triggered.

(it works on deployment but not on emulator)

Here is my function:

exports.checkInteractionCount = functions.database.instance("my-db-name").ref("path/to/data").onUpdate(async (change, context) => {
    //console.log(change);
})

this is just a basic function but it gives error that I shared.

Here were error occurs:

lass DataSnapshot {
    constructor(data, path, // path will be undefined for the database root
    app, instance) {
        this.app = app;
        if (app && app.options.databaseURL.startsWith('http:')) {
            // In this case we're dealing with an emulator
            this.instance = app.options.databaseURL;
        }
.
.
.

Answer 1

我遇到了同样的问题，我通过删除函数文件夹并再次运行 firebase init 来解决它......然后我只是替换了文件并且一切正常。