Can I use type of TypeScript in io-ts

Question

I am working for validating api response by using io-ts. https://github.com/gcanti/io-ts

I have already defined following type of TypeScript.

    export type Group = {
        id: number
        name: string
    } 

And I want to use this type in io-ts as below.

    const UploadedSearch = t.type({
        id: t.number,
        title: t.string,
        groups: t.array(Group),
    })

But I got a following error.

TS2693: 'Group' only refers to a type, but is being used as a value here.

Is there any way to use Group in io-ts code ?

Answer 1

The comment on your question already mentioned this but to illustrate how to use io-ts not to repeat yourself, you can say:

const GroupCodec = t.type({
  id: t.number,
  name: t.string,
});
// Will be equivalent to your group type, so no need to repeat yourself.
export type Group = t.TypeOf<typeof GroupCodec>;

const UploadedSearch = t.type({
  id: t.number,
  title: t.string,
  groups: t.array(GroupCodec),
});