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javascript - 如何根据搜索参数获取新的数据数组？

问题描述

我有一些从 API 调用请求的数据，我需要过滤这些数据。

我正在使用 Redux 而不是本地状态来处理它。

以下是我的行动：

import ActionTypes from '../constants/ActionTypes';


export const passengersDataAction = passengersData => ({
  type: ActionTypes.PASSENGERS_DATA,
  // This is the array of objects that I need to search through
  payload: { passengersData }, 
});

export const searchParamAction = searchParam => ({
  type: ActionTypes.SEARCH_PARAM,
  // This is the param that I need to send to passengersData
  // in order to get a new array of objects
  payload: { searchParam },
});

这是我的减速机：

import createReducer from '../../../redux/createReducer';
import ActionTypes from '../constants/ActionTypes';

const initialState = {
  passengersData: [],
  searchParam: '',
};

const handlers = {
  [ActionTypes.PASSENGERS_DATA](state, action) {
    return {
      ...state,
      passengersData: action.payload.passengersData,
    };
  },

  [ActionTypes.SEARCH_PARAM](state, action) {
    return {
      ...state,
      searchParam: action.payload.searchParam,
    };
  },
};

export default createReducer(initialState, handlers);

而上面就是减速机。

我想要的是根据 的值返回一个新的对象数组searchParam。

像这样的东西：

  [ActionTypes.SEARCH_PARAM](state, action) {
    return {
      ...state,
      passengersData://HERE GOES THE NEW ARRAY BASED ON WHAT searchParam RETURNS,
      searchParam: action.payload.searchParam,
    };
  },

在我这样做的组件中：

  <View>
    <TextInput
      style={PassengersStyles.SearchBox}
      // searchParamActionHandler sends the input value to the update the reducer
      onChangeText={text => searchParamActionHandler(text)}
      value={searchParam}
      placeholder="Search..."
    />
  </View>
  <Text>{searchParam}</Text>
  <PassengerCardBasedOnRoute searchParam={searchParam} />

PassengerCardBasedOnRoute是渲染来自的对象数组的组件passengersData。像这样：

           {passengersData.map(info => (
            <PassengersInfo
              key={info.id}
              searchParam={this.props.searchParam}
              cardinalpoint={info.cardinalpoint}
              name={info.name}
              address={info.address}
              datetime={info.timestamp}
            />
           }

顺便说一句，这就是对象数组的外观：

[
 {
  "id": 3,
  "name": "Marcos Alonso",
  "address": "Sabana",
  "phone": "712321222",
  "pickup": 0,
  "cardinalpoint": "N",
  "latitude": "9.93683450",
  "longitude": "-84.10991830",
  "timestamp": "2019-02-19 21:23:46",
  "dropofftimestamp": null,
  "pickuptimestamp": null,
  "deleted": null,
  "driver": 1
 },
 ...
]

那么，我怎样才能返回那个新数组来呈现搜索条件呢？

标签： javascriptreactjsecmascript-6reduxreact-redux

解决方案

在“SEARCH_PARAM”操作类型的减速器中，您可以从状态创建“passengersData”的副本，并根据需要更改该副本。

const initialState = {
  passengersData: [],
  searchParam: '',
  searchedData: []
};

[ActionTypes.SEARCH_PARAM](state, action) {
//In filter you can add your own logic to get the data
const searchedData = state.passengersData.filter((passenger) => passenger.name === action.payload.searchParam);

   return {
     ...state,
     searchedData,
     searchParam: action.payload.searchParam,
   };
},

仅供参考，这将用“searchedData”替换“passesngerData”。如果您想保留原始的“passengerData”，那么您可以在 redux 存储中创建一个新状态并从减速器返回它。

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