In NGRX, how do I chain actions from different reducers?

Question

In my Angular/NGRX application I have two reducers, reducerA and reducerB.

• reducerA retrieves a user ID;
• In reducerB i have an action called GET_ALL_POSTS.

How can I wait for reducerA to resolve before calling reducerB.

Answer 1

Assuming you are doing this with an effect, you could map the GET_ALL_TRANSACTIONS action when the first one finishes. eg.

retrieveUserId.pipe(
   switchMap((userId) => {
       new GET_ALL_TRANSACTIONS()
   })
)