商店没有有效的减速器。反应 redux 新的

Question

这是我的减速器代码，请检查这是我最后一年的项目

import CHILDREN from '../../data/dummy-data';

const initialState = {
    availableChilds: CHILDREN,
    specificChilds: CHILDREN.filter(id => id.registrationId === '1')
};

export default (state = initialState, action) => {
    return state;
};

这是我的 app.js 代码

import childReducer from './store/reducers/child';

const rootReducer = combineReducers({
  childs: childReducer
});

const store = createStore(rootReducer);