Angular 6/NGRX 组合 reducer

Question

我正在使用带 NgRX 4 的 Angular 6。我有多个 reducer ，我想结合起来。

app.module.ts

  import { BrowserModule } from '@angular/platform-browser';
    import { NgModule } from '@angular/core';

    import { StoreModule } from '@ngrx/store';
    import { EffectsModule } from '@ngrx/effects';

    import { StoreDevtoolsModule } from '@ngrx/store-devtools';

    import { AppComponent } from './app.component';
    import counterEffects from './store/counter/counter.effects';

    import reducers from './store/reducers';

    @NgModule({
      declarations: [AppComponent],
      imports: [
        BrowserModule,
        StoreModule.forRoot(reducers),
        EffectsModule.forRoot([counterEffects]),
        StoreDevtoolsModule.instrument({
          maxAge: 10,
        }),
      ],
      providers: [],
      bootstrap: [AppComponent],
    })
    export class AppModule {}

reducers.ts

import { combineReducers } from '@ngrx/store';
import { reducer as counterReducer, key as counterKey } from './counter';
import { reducer as profileReducer, key as profileKey } from './profile';

const appReducer = combineReducers({
  [counterKey]: counterReducer,
  [profileKey]: profileReducer,
});

export default (state, action) => {
  if (action.type === 'REDIRECT_TO_EXTERNAL') {
    state = undefined;
  }

  return appReducer(state, action);
};

我的 reducer 是标准 reducer ，没有什么特别之处。

来自 React/Redux 背景，我会像这样设置多个 reducer，但是在 Angular 中，当我尝试从商店中选择时，我得到了未定义。当我尝试使用开发工具查看商店时，我看不到任何缩减器，状态只是 {}

如何在 Angular 6/NgRX 4 中设置多个 reducer ？

Answer 1

import { ActionReducerMap } from '@ngrx/store';
import { reducer as counterReducer, key as counterKey } from './counter';
import { reducer as profileReducer, key as profileKey } from './profile';

export interface IAppState {
  [counterKey]: any;
  [profileKey]: any;
}

export const reducers: ActionReducerMap<IAppState> = {
  [counterKey]: counterReducer,
  [profileKey]: profileReducer,
};