Ability to return null

[wallzero]

A common issue I've run into with RxR reducers is accessing state. The reducers must return state, but in some workflows a reducer is going to call other reducers. For example, here in fetchClientsReducer$.

If you nest the reducer calls in the curried function, then the state modifications made by those calls will be wiped when you return the old state:

(something) => (state) => {
  //Call another reducer:
  actionStreams.commonReducer$.next({...state.something, ...something});
  // Returning this state will now undo the changes made by commonReducer
  return state;
}

You can do:

(something) => {
  actionStreams.commonReducer$.next({...state.something, ...something});
  return (state) => state;
}

But then you don't have access to state.

I think reducers should have the option to return nothing or return undefined, and RxR should know the reducer doesn't modify state.

(something) => (state) => {
  //Call another reducer:
  actionStreams.commonReducer$.next({...state.something, ...something});
}

When I try this now, my state object is wiped.