Javascript Like&；期间Firebase函数出现错误500；厌恶特征

我目前正在观看从udemy购买的教程，在实现过程中，我在实现Like或unlike特性时遇到了一个问题

当我向Firebase函数发出post请求时，控制台中出现错误500，在Firebase函数日志中我看到此错误：

Value for argument "documentPath" is not a valid resource path. Path must be a non-empty string.
    at Object.validateResourcePath (/srv/node_modules/@google-cloud/firestore/build/src/path.js:403:15)
    at CollectionReference.doc (/srv/node_modules/@google-cloud/firestore/build/src/reference.js:1718:20)
    at exports.updateLikesCount.functions.https.onRequest (/srv/lib/index.js:24:44)
    at cloudFunction (/srv/node_modules/firebase-functions/lib/providers/https.js:57:9)
    at /worker/worker.js:783:7
    at /worker/worker.js:766:11
    at _combinedTickCallback (internal/process/next_tick.js:132:7)
    at process._tickDomainCallback (internal/process/next_tick.js:219:9)

Value for argument "documentPath" is not a valid resource path. Path must be a non-empty string.
    at Object.validateResourcePath (/srv/node_modules/@google-cloud/firestore/build/src/path.js:403:15)
    at CollectionReference.doc (/srv/node_modules/@google-cloud/firestore/build/src/reference.js:1718:20)
    at exports.updateLikesCount.functions.https.onRequest (/srv/lib/index.js:24:44)
    at cloudFunction (/srv/node_modules/firebase-functions/lib/providers/https.js:57:9)
    at /worker/worker.js:783:7
    at /worker/worker.js:766:11
    at _combinedTickCallback (internal/process/next_tick.js:132:7)
    at process._tickDomainCallback (internal/process/next_tick.js:219:9)

firebase的Index.js文件函数

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

admin.initializeApp(functions.config().firebase);


// // Start writing Firebase Functions
// // https://firebase.google.com/docs/functions/typescript


export const updateLikesCount = functions.https.onRequest((request, response) => {

    console.log(request.body);

    const eventId = request.body.eventId;
    const userId = request.body.userId;
    const state = request.body.state; //like or unlike

    // tslint:disable-next-line: no-floating-promises
    admin.firestore().collection("events").doc(eventId).get().then((data: any) => {

        let likesCount = data.data().likesCount || 0;
        let likes = data.data().likes || [];

        let updateData = {} as any;


        if (state === "like") {
            updateData["likesCount"] = ++likesCount;
            updateData[`likes.${userId}`] = true;
        }
        else {
            updateData["likesCount"] = --likesCount;
            updateData[`likes.${userId}`] = false;
        }

        admin.firestore().collection("events").doc(eventId).update(updateData).then(() => {
            response.status(200).send("Done");
        }).catch((err) => {
            response.status(err.code).send(err.message);
        })

    }).catch((err) => {
        response.status(err.code).send(err.message);
    })
})

Feed.html

<div class = "content" *ngFor="let event of events">
<ion-button (click)="like(event)">Like</ion-button>
...

当我单击“喜欢”按钮时，我得到错误500，当我与邮递员一起测试时，我得到以下错误：

Value for argument "documentPath" is not a valid resource path. Path must be a non-empty string.
    at Object.validateResourcePath (/srv/node_modules/@google-cloud/firestore/build/src/path.js:403:15)
    at CollectionReference.doc (/srv/node_modules/@google-cloud/firestore/build/src/reference.js:1718:20)
    at exports.updateLikesCount.functions.https.onRequest (/srv/lib/index.js:24:44)
    at cloudFunction (/srv/node_modules/firebase-functions/lib/providers/https.js:57:9)
    at /worker/worker.js:783:7
    at /worker/worker.js:766:11
    at _combinedTickCallback (internal/process/next_tick.js:132:7)
    at process._tickDomainCallback (internal/process/next_tick.js:219:9)

Value for argument "documentPath" is not a valid resource path. Path must be a non-empty string.
    at Object.validateResourcePath (/srv/node_modules/@google-cloud/firestore/build/src/path.js:403:15)
    at CollectionReference.doc (/srv/node_modules/@google-cloud/firestore/build/src/reference.js:1718:20)
    at exports.updateLikesCount.functions.https.onRequest (/srv/lib/index.js:24:44)
    at cloudFunction (/srv/node_modules/firebase-functions/lib/providers/https.js:57:9)
    at /worker/worker.js:783:7
    at /worker/worker.js:766:11
    at _combinedTickCallback (internal/process/next_tick.js:132:7)
    at process._tickDomainCallback (internal/process/next_tick.js:219:9)

这是你失败的一行，你的邮递员原始数据需要是JSON格式。默认设置为text，必须将其更改为JSON（application/JSON）

另外，确保函数返回一个承诺

export const updateLikesCount = functions.https.onRequest((request, response) => {

    console.log(request.body);

    const eventId = request.body.eventId;
    const userId = request.body.userId;
    const state = request.body.state; //like or unlike

    return admin.firestore().collection("events").doc(eventId).get().then((data: any) => {

        let likesCount = data.data().likesCount || 0;
        let likes = data.data().likes || [];

        let updateData = {} as any;


        if (state === "like") {
            updateData["likesCount"] = ++likesCount;
            updateData[`likes.${userId}`] = true;
        }
        else {
            updateData["likesCount"] = --likesCount;
            updateData[`likes.${userId}`] = false;
        }


 return admin.firestore().collection("events").doc(`${eventId}`).update(updateData).then(() => {
            response.status(200).send("Done");
        }).catch((err) => {
            response.status(err.code).send(err.message);
        })

    }).catch((err) => {
        response.status(err.code).send(err.message);
    })
})

我为您的函数添加了两个返回语句，它们知道何时完成，还确保文档使用eventId作为字符串

最后，我不需要

JSON.stringify（body）

您的负载，按原样发送对象；很好

if (typeof (request.body) === 'string') {
        body = JSON.parse(request.body);
    } else {
        body = request.body;
    }

---

通过添加这些代码行，问题就消失了。谢谢

你确定

['likes.${userId}]

不应该是

['likes.${userId}]

（错误的括号）？我添加了返回值，但返回值是一样的。如果（！is.string（resourcePath）| resourcePath===''）{抛出新错误（

路径必须是非空字符串。

）}我不知道把这行代码放在哪里。如果我删除了JSON.Stringify，那么就会出现CORS相关的错误，请继续粉碎它