Check if a mutation result is optimistic

[chrisgco]

Hey is there a way to check if a mutation result is optimistic or if the result is from the server? It looks like isFetching is false when an optimistic result is returned so I can't figure out if I'm getting the real result.

I'm trying to achieve something like the following:

const [{ result, fetching, error, isOptimistic }, executeMutation] = useMutation(MutationDocument)

return (
  <Button
     onPress={() => executeMutation()}
     isDisabled={isOptimistic || isFetching}
  />
)

So that multiple requests are not sent while the server request is loading.

[JoviDeCroock]

What I have done in the past is add a prefix/... to the id or another property to indicate that this is an optimistic response. I also think that operation.context should be carrying an optimistic flag.