Javascript 数组 Function 不返回数组

Question

I'm trying to return an Array of strings from this function:

 let returnArr = []; export async function snapshotToArray() { const db = firebase.firestore(); db.collection('userinfo').get().then(querySnapshot => { querySnapshot.forEach(documentSnapshot => { let id = documentSnapshot.id; returnArr.push(id).toString(); }); console.log(returnArr); return returnArr; }); }

It should be noted that the console seems to print exactly what I need it to print / return.

The Array creation Function is being called from this Function:

 export async function getStaticPaths() { const paths = await snapshotToArray(); return { paths, fallback: false } }

For whatever reason it doesn't seem to be returning what I am seeing in the console.

Here is the Error I'm receiving:

 Error: Invalid `paths` value returned from getStaticPaths in /user/[name]. `paths` must be an array of strings or objects of shape { params: [key: string]: string }

I've tried so many different ways of doing this but I can't seem to figure it out. Any help is appreciated.

Answer 1

It seems that the snapshotToArray function has no return value.

let returnArr = [];
export async function snapshotToArray() {
    const db = firebase.firestore();
    const querySnapshot = await db.collection('userinfo').get()
    querySnapshot.forEach(documentSnapshot => {
        let id = documentSnapshot.id;
       returnArr.push(id).toString();
    });
    console.log(returnArr);
    return returnArr;
}

The following async-await usage should help you.