nextjs auto convert mongodb ObjectId to string

Question

This is an issue I am struggeling for a while, once you reference an ObjectId within a document in MongoDB and later serialise it as JSON, it will throw an error

Error: Error serializing `.kurs` returned from `getServerSideProps` in "/course".
Reason: `object` ("[object Uint8Array]") cannot be serialized as JSON. Please only return JSON serializable data types.

This is due to that ObjectId is not autoconvertible to string, is there any fix for that or a good approach?

Could you provide is with more code? it's hard to visualize how it's currently being implemented in your code without a reference. https://stackoverflow.com/help/minimal-reproducible-example — Dylan L., Apr 12 '22 at 22:32

Daniel Scerpa · Answer 1 · 2022-04-12T18:57:16.133

0

Maybe you can call the toString() method on these properties to get the correct string values.

Or write something with:

JSON.stringify(dataObject)

EDITED: something like this work in my code

export async function getStaticData() {
    const data = await getAllData();
    const allData = JSON.stringify(data)

    return {
        props: {
             allData
        }
   };
}

edited Apr 12 '22 at 18:57

answered Apr 12 '22 at 18:05

Daniel Scerpa

64
8

Hi, that does not work, was my first try ofc.. – marius Apr 12 '22 at 18:35
I've edited my answer..otherwise this might help(?) : [link](https://stackoverflow.com/questions/66106776/error-how-to-serialize-data-from-getstaticprops-next-js) – Daniel Scerpa Apr 12 '22 at 18:58
thanks for the hint, I tried that as well JSON.stringify() and after JSON.parse(), it does not work for me same issue, its strange that it works for you!? – marius Apr 13 '22 at 08:19
Yes, could you share with us your code? – Daniel Scerpa Apr 13 '22 at 21:08

nextjs auto convert mongodb ObjectId to string

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