如何在 React Redux 中使用 combineReducers？并 combineReducers 'sate' 对象到多个 reduce

Question

我最近开始研究 react web 开发应用程序，并开始在我的应用程序中使用 react redux saga。所以问题是我创建了两个减少 reducer1 ， reducer2 并使用 combineReducers 但状态没有发送回 propsToState em> 在我的组件上。

注意：如果我使用单个减速器，它工作正常

示例代码：

我的商店

// create the saga middleware
const sagaMiddleware = createSagaMiddleware();

const rootReducers = combineReducers({reduce1, reducer2})

// create a redux store with our reducer above and middleware
let store = createStore(
  rootReducers,
  compose(applyMiddleware(sagaMiddleware))
);



// run the saga

function* rootSaga () {
  yield all([
      fork(saga1),
      fork(saga2),
  ]);
}

sagaMiddleware.run(rootSaga);

我的减速机

// reducer with initial state
const initialState = {
    p1: false,
    p2: null,
    p3: null
  };

  export function reducer1(state = initialState, action) {
    console.log(state);
    switch (action.type) {
      case ACTION1:
        return { ...state, p1: true, p3: null };
      case ACTION2:
        const lState = { ...state, p1: false, p2: action.data };
        return lState;
      default:
        return state;
    }
  }

注意：和reduce2类似reducer1

在我的组件上

const mapStateToProps = state => {
  return {
    loggining: state.loggining,
    user: state.user,
    error: state.error
  };
};

Answer 1

在获取映射到特定减速器的状态时，您缺少应该是减速器名称的键。

const mapStateToProps = state => {
  return {
    loggining: state.reducer1 .loggining, //add key reducer1
    user: state.reducer1 .user,
    error: state.reducer1.error
  };
};

请查找更多details here