reactjs - 错误 : Response is not valid JSON object on firebase function with onCall

Question

这是我的云函数代码

 exports.markThemAllRead = functions.https.onCall((data) => {
    const user = {
        id: data.id,
    }
    let batch = admin.firestore().batch();

    admin.firestore().collection("Notifications").doc("comments").collection(user.id).get().then(querySnapshot => {
        if(querySnapshot.empty){
            return "nice"
        }else {
            querySnapshot.forEach(doc=>{
                batch.update(doc.ref, {isRead:true})
            });
            return batch.commit()
        }
    }).catch(err => {
        console.log(err)
    })
    return "Good"
    })

我尝试了多种 return 语句的组合，但我一直收到错误:响应不是有效的 JSON 对象。谁能指导我解决问题是什么？我的代码中还有许多其他可用的 onCall 函数，但这是唯一一个带有 batch.update() 的函数...也许这与它有关？

编辑尝试

尝试此操作时仍然出现相同的错误:

exports.markThemAllRead = functions.https.onCall((data) => {
    const user = {
        id: data.id,
    }

    return markThemRead(user)

})

async function markThemRead(user){
    let batch = admin.firestore().batch();

    const docsRef = admin.firestore().collection("Notifications").doc("comments").collection(user.id)

    const docs = await docsRef.get();

    docs.forEach(function(doc){
        batch.update(doc.ref, {isRead:true})
    })

    return batch.commit()

}

Answer 1

基于 Firebase 文档中的示例 Sync, async and promises

async function markThemRead(user){
    let batch = admin.firestore().batch();

    const docsRef = admin.firestore().collection("Notifications").doc("comments").collection(user.id)

    const docs = await docsRef.get();

    docs.forEach(function(doc){
        await batch.update(doc.ref, {isRead:true})
    })

    return batch.commit().then(function () { return {status: "All Good"}})

}