Should the PATCH method return all fields of the resource in the response body?

Question

Should the PATCH method return all fields of the resource in the response body?
Or should it return only updated fields?

I\'m reading this

For example, i

Answer 1

The specification of PATCH doesn't mandate this.

If you want to control it you may want to look at https://greenbytes.de/tech/webdav/rfc7240.html#return for inspiration.