问React/Redux和API数据对象

EN

{  
   "coord":{  
      "lon":-0.13,
      "lat":51.51
   },
   "weather":[  
      {  
         "id":311,
         "main":"Drizzle",
         "description":"drizzle rain",
         "icon":"09d"
      },
      {  
         "id":501,
         "main":"Rain",
         "description":"moderate rain",
         "icon":"10d"
      }
   ],
   //-------- 
    //-------- 
    "id":2643741,
   "name":"London",
   "cod":200
}

export const DayItem = (props) => {
  return (<MuiThemeProvider>
                <Paper zDepth={2}>
                {props.data.coord.lon} // No way!
                {props.data.name} // OK!
                </Paper>
              </MuiThemeProvider>)}

function* getPosition() {
  const getCurrentPosition = () => new Promise(
    (res, rej) => navigator.geolocation.getCurrentPosition(res, rej))

  // Gets user's current position assigned to const
  const pos = yield call(getCurrentPosition);
  const {latitude, longitude} = pos.coords;

  // Yields the forecast API by user coordinates
  const data = yield call(getForecastByCoords, latitude, longitude)

  // Yields user's local forecast to the reducer
  yield put({
    type: LOAD_DATA_SUCCESS,
    data
  });
}

function mapStateToProps(state) {
  return {
    chips: state.chipsReducer,
    data: state.dataReducer
  }
};

export const dataReducer = (state = {}, action) => {
  switch (action.type) {
    case LOAD_DATA_SUCCESS:
      return action.data;
    default:
      return state;
  }
};