Function DocumentReference.set() called with invalid data. Unsupported field value: a custom Budget object

Question

Below code works fine until today. But I don\'t know now it is not working and gives below error.Could you tell me why?

Error: Function DocumentRefere

Answer 1

You can also use the spread operator like:

this.fireStore
  .doc(`projects/${projectId}/`)
    .set( {...proj} ))

It work for me