我收到了來自 backed 的回復，看起來像這樣。但是當我嘗試像這樣記錄數據時。render() {    const { reviews } = this.props;    console.log('rev', reviews.reviewList.data._embedded);它給了我這樣的錯誤。類型錯誤：reviews.reviewList.data 未定義reviewDataReducer.jsxconst initialstate = {  isFetching: false,  reviewList: [],  page: null,  fetched: false,  error: null};export default (state = initialstate, action) => {  switch (action.type) {    case actionTypes.GET_PRODUCT_REVIEWS_LOAD:      return {        ...state,        isFetching: true      };    case actionTypes.GET_PRODUCT_REVIEWS_SUCCESS:      return {        ...state,        fetched: true,        reviewList: action.payload      };    case actionTypes.GET_PRODUCT_REVIEWS_ERROR:      return {        ...state,        fetched: false,        isFetching: false,        error: action.error      };    default:      return state;  }};reviewActions.jsxexport const getProductReviews = pid => dispatch => {    console.log('rev pid',pid)  dispatch({    type: types.GET_PRODUCT_REVIEWS_LOAD  });  new _rest()    .get(`/buyer/product/${pid}/review`)    .then(res => {      console.log("Review Action Response", res);      dispatch({        type: types.GET_PRODUCT_REVIEWS_SUCCESS,        payload: res      });    })    .catch(error => {      dispatch({        type: types.GET_PRODUCT_REVIEWS_ERROR,        error: error      });    });};連接const mapStateToprops = state => ({  reviews: state.reviews.data});const mapStateToDispatch = {  getProductReviews};export default connect(  mapStateToprops,  mapStateToDispatch)(ReviewContainer);