Looking for a solution with two reducers:
export function reducer1(state: State = initialState,: Actions1.Actions1);
export function reducer2(state: State = initialState,: Actions2.Actions1);
What I want is for both reducers to affect the same state object.
Since they will be working on the same state object, splitting it into smaller pieces like this answer suggests is not an option.
Initially, you mentioned splitting the reducer into smaller reducers, so I won't delve into that topic again.
Another approach is to utilize NGRX/Entity to enable NGRX to handle CRUD operations for you, thereby reducing code complexity. NGRX/Entity provides APIs that allow developers to perform CRUD operations on the state effortlessly.
For instance:
const userReducer = createReducer(
initialState,
on(UserActions.addUser, (state, { user }) => {
return adapter.addOne(user, state)
}),
on(UserActions.upsertUser, (state, { user }) => {
return adapter.upsertOne(user, state);
}),
...
);Looking for a solution on how to break down a large reducer into smaller ones? Check out this helpful guide.
Here's a possible solution that might work for you:
export const mergeReducers = <TState>(...reducers: ActionReducer<TState>[]): ActionReducer<TState> => {
return (state: TState, action: Action) => {
if (reducers.length === 0) {
throw new Error('At least one reducer is required');
}
return reducers.reduce((initialState, reducer) => {
return reducer(initialState, action);
}, state);
};
};
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