Selector for useMutation result before return

[zirkelc]

I use the select option of useQuery to parse JSON strings fields into actual objects before returning them. I think it would be helpful to have the same option available on useMutation. What do you think?

Is there any other workaround to transform the mutation result before returning it?

[TkDodo]

at the moment, you can just await the result in the mutateFn, and then transform it before you return it?

useMutation(async () => {
  const { data } = await axios.post(...)
  return transformData(data)
})

[zirkelc]

is that also possible in the onSuccess handler? The promisable return type Promise<unknown> | void indicates this.

[TkDodo]

You can return a promise there because it will be awaited, but it doesn’t change the type of data

[zirkelc]

Okay, thank your for the info! Do you guys plan to add select for mutations as well?

[TkDodo]

my currently vague plan is to bring mutations on-par with queries :)