How to type properties in merging object for getInitialState of createEntityAdapter object?

Question

I want to type status with FetchingStatus type. How to implement that?

type FetchingStatus = 'idle' | 'loading' | 'succeeded' | 'failed';

const initialState = companyPagesAdapter.getInitialState({
        status: 'idle',
        perPage: 1,
        lastPage: 1
    });

here is signature of getInitialState:

getInitialState<S extends object>(state: S): EntityState<T> & S

share your companyPagesAdapter object and getInitialState method — captain-yossarian from Ukraine, Jul 19 '21 at 09:55
@captain-yossarian, Btw, those are not mine, those are implemented by redux developers. I added getInitialState signature, I guess it is impossible to impelent, bruh moment — Dima Kambalin, Jul 19 '21 at 10:05
@AshwynHorton, but the generic is not destined for the merge object we pass in getInitialState method, is it? — Dima Kambalin, Jul 19 '21 at 10:09
I actually tried doing this myself, and I see what you mean...interesting, I get a string cast to ```Status``` error... — bloo, Jul 19 '21 at 10:24

zapala.grzegorz · Answer 1 · 2022-04-25T04:41:06.700

type FetchingStatus = "idle" | "loading" | "succeeded" | "failed";
    
    
interface ExtendedEntityAdapterState {
    status: FetchingStatus
    perPage: number,
    lastPage: number
}

const initialState: ExtendedEntityAdapterState   = {
  status: 'idle',
  perPage: 1,
  lastPage: 1
});

companyPagesAdapter.getInitialState(initialState)

Something like this worked for me. Reducer action gives correct constraints.

How to type properties in merging object for getInitialState of createEntityAdapter object?

1 Answers1