How can I make sure the return statement in getServerSideProps is only executed once all fetching operations are finished?

Question

How can I make sure the return statement in getServerSideProps is only executed once all fetching operations are finished?

Currently, I am able to retrieve a person's username and corresponding data object with just one fetch from firebase. Inside this data object, there is a property named "uploads," which contains an array of documentIDs representing posts uploaded by the user. My goal is to fetch all these documents, compile them into an array, and then send back the entire array to the page.

Here is the code I have written up until now: https://i.sstatic.net/OC74t.png

The issue I am facing is that the return statement on line 54 is executing before all elements of postIDs are looped through. As a result, an empty array is being returned to the component.

If you need more information, please let me know. Any assistance on this matter would be greatly appreciated. Thank you in advance!

javascript firebase next.js

Answer 1

Answer №1

If you want to optimize your code, consider using a for...of loop instead:

for (const id of userPosts.uploads) {
    const reference = doc(db, `posts/${id}`)
    const snap = await getDoc(reference)
    const data = snap.data()
    data.timestamp = data.timestamp.toJSON()
    postArray.push(data)
}

return { props: { postArray }}

Answer 2

If you want to optimize your code, consider using a for...of loop instead:

for (const id of userPosts.uploads) {
    const reference = doc(db, `posts/${id}`)
    const snap = await getDoc(reference)
    const data = snap.data()
    data.timestamp = data.timestamp.toJSON()
    postArray.push(data)
}

return { props: { postArray }}

Answer 3

Answer №2

Have you considered utilizing Promise.all in your code?

const promises = [];
promises.push(somePromise);

// Ensure all promises have resolved
Promise.all(promises).then((results) => {
    // Perform actions once all promises have resolved
});

Answer 4

Have you considered utilizing Promise.all in your code?

const promises = [];
promises.push(somePromise);

// Ensure all promises have resolved
Promise.all(promises).then((results) => {
    // Perform actions once all promises have resolved
});

How can I make sure the return statement in getServerSideProps is only executed once all fetching operations are finished?

Answer №1

Answer №2

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