Question

运行User onDelete Firebase Cloud Function时出现错误Error in function [undefined:: object is not iterable (cannot read property Symbol(Symbol.iterator))]（我在函数中键入了错误），这是我的User onCreate函数（类似于超级按钮）的近镜：

const functions = require('firebase-functions');
const admin = require('firebase-admin');
const FS = admin.firestore();
const FA = admin.auth();

exports.newUser = functions.auth.user().onCreate(async(user)=>{
    const fTime = admin.firestore.Timestamp.now()
    const day = fTime.toDate().toLocaleDateString().replace('/','-').replace('/','-')
    const time = fTime.toDate().toLocaleTimeString('en',{hour12:false})+'.'+fTime.toDate().getMilliseconds()
    try {
        const act1 = FS.doc(`users/${user.uid}`).create({email:user.email})
        const act2 = FS.doc(`globalEvents/${day}`).set({[time]:{time:fTime,source:'Function newUser',description:`Account created for [${user.uid} - ${user.email}]`}},{merge:true})
        const promise = await Promise.all(act1,act2)
        return promise
    }
    catch (err) {
        return FS.doc(`globalEvents/${day}`).set({[time]:{time:fTime,source:'Function newUser',description:`Error in function [${err.code}:: ${err.message}]`}},{merge:true})
    }
})

exports.delUser = functions.auth.user().onDelete(async(user)=>{
    const fTime = admin.firestore.Timestamp.now()
    const day = fTime.toDate().toLocaleDateString().replace('/','-').replace('/','-')
    const time = fTime.toDate().toLocaleTimeString('en',{hour12:false})+'.'+fTime.toDate().getMilliseconds()
    try {
        const act1 = FS.doc(`users/${user.uid}`).delete()
        const act2 = FS.doc(`globalEvents/${day}`).set({[time]:{time:fTime,source:'Function delUser',description:`Account deleted for [${user.uid} - ${user.email}]`}},{merge:true})
        const promise = await Promise.all(act1,act2)
        return promise
    }
    catch (err) {
        return FS.doc(`globalEvents/${day}`).set({[time]:{time:fTime,source:'Function delUser',description:`Error in function [${err.code}:: ${err.message}]`}},{merge:true})
    }
})

对于那些具有Firebase Cloud功能的用户，我拥有“ admin.initializeApp（）;”在index.js中，上面的内容在exports.newUser = users.newUser" & "exports.delUser = users.delUser

链接的user.js中

由于我将其布置为异步性质（再次，onCreate可以完美运行），它仍然会删除用户的文档，但会触发捕获并创建以下文档：

12:48:24.981
description
"Error in function [undefined:: object is not iterable (cannot read property Symbol(Symbol.iterator))]"
source
"Function delUser"
time
November 8, 2020 at 7:48:24 AM UTC-5

Answer 1

这是因为Promise.all()接受一个参数，该参数必须是iterable的Promises，例如Array。

通过传递如下的数组await Promise.all([act1, act2])，而不是执行await Promise.all(act1,act2)，将解决问题。

Firebase函数故障：（未定义）对象不可迭代（无法读取属性Symbol（Symbol.iterator））

1 个答案: