错误：如何从 Next.js 中的 getStaticProps 序列化数据

Question

I am trying to fetch data from an Api but for sorry i've received this Error:

Server Error Error: Error serializing .results returned from getServerSideProps in "/". Reason: undefined cannot be serialized as JSON. Please use null or omit this value.

my code

Answer 1

The props you're passing contain an object with a key of value undefined . A quick solution would be

return {
 props: {
   results: JSON.parse(JSON.stringify(request.results)); 
 }
}

JSON.stringify will remove those undefined values. You can try it out in your browser console: JSON.stringify({someKey:undefined})