react.js CMS 删除功能的实现方法

发布时间：2020-10-20 07:46:33 作者：jingxian
来源：脚本之家阅读：150

页面效果图：

数据操作分析：

在查询表组件的 TableData.js 中操作如下内容：

给每一行绑定一个checkbox，且在点击这个 checkbox 时，触发 action 中的一个方法(formatPostCollectionList)，这个方法是用来更新选中的实体数组。formatPostCollectionList为action中的方法，需要export

定义每一行的实体为一个数组，用变量 postCollections 表示

如果选中当前行，则更新实体数组中的数据；如果取消当前行，则删除实体中的数据；

参数为 row ；

点击删除按钮后，使用 componentDitUpdate() 生命周期方法，在组件更新后调用。

如果删除成功，则执行 action 中的方法 clearPostCollection()。这个方法是用来清空当前行实体中的数据；

如果删除成功，最后执行查询表的刷新重新加载数据的方法

更新实体数据与清空实体数据的方法，在 action 中执行。

代码分析：

表查询操作

1、调查询接口，Api中的方法

searchPostCollectionByActivityId(activityId, callback) {
    const queryParam = `/tob/post/search?activeId=${activityId}`;  //接口，使用``可以在URL中显示查询参数
    Config.get(queryParam, callback);
  }

2、action中操作查询数据的方法 postCollectionEntityList 存放接口中的所有数据

export function initPostCollection(row){
  return (dispatch, getState) => {
    let activityId = row.activityId;
    Api.searchPostCollectionByActivityId(activityId, params => {
      dispatch(initPostCollectionSetter(activityId,params));
    });
  }
}
function initPostCollectionSetter(activityId,params){
  return {
    type:INIT_POST_COLLECTION,
    activityId:activityId,
    data:{postCollectionEntityList:params}
  }
}

3、TatleData 表组件中调用 action 的方法，至此表数据 OK

export default class TableData extends Component {
  constructor(props){
    super(props);
  }

  componentDidMount() {
    const param = this.props.queryData;
    console.log("param === " + param);
    this.props.initPostCollection(param);//action中获取接口数据的方法
  }

  render(){
　　   // 定义postCollectionEntityList中的数据
    let postCollectionEntityList = [
      {
        postCollectionName:'',
        postCollectionId:'',
        activityId:''
      }
    ];
    //判断，如果postCollectionEntityList中有数据，则把数据显示出来
    if (this.props.postCollectionState.postCollectionEntityList) {
      postCollectionEntityList = this.props.postCollectionState.postCollectionEntityList;
      console.log("postCollectionEntityList" + postCollectionEntityList);
    }

    //acb 表数据
    return(
      <div><TableExit data={postCollectionEntityList} acb={this.props.initPostCollection}>
          <TableCloumnsExit dataField="activityTitle">活动名称</TableCloumnsExit>
          <TableCloumnsExit dataField="postCollectionName">帖子集名称</TableCloumnsExit>
          <TableCloumnsExit dataField="postCollectionId">帖子集编号</TableCloumnsExit>
          <TableCloumnsExit dataField="active" dataFormat={this.postCollectionFormatter}>修改</TableCloumnsExit>
          <TableCloumnsExit dataField="send" dataFormat={this.activeFormatter.bind(this)}>发送</TableCloumnsExit>
          <TableCloumnsExit dataField="send" dataFormat={this.questionBankFormatter.bind(this)}>题库</TableCloumnsExit>
        </TableExit>
      </div>
    );
  }
}

删除表数据操作

调删除接口，API中的方法

deletePostCollections (activityId ,params, callback) {
    let path = `/tob/post/deletePostCollection/${activityId}`; //删除接口
    Config.deleteWithNoResponse(path ,params, callback);
  }

action 中写删除数据的方法

删除实体

删除实体前要先插入 checkbox

checkboxFormatter(cell,row) {
    return <input bsStyle="primary" type="checkbox"></input>
  }

查询表中使用 checkbox

<TableCloumnsExit dataField="alter" dataFormat={this.checkboxFormatter.bind(this)}>选择</TableCloumnsExit>

点击 checkbox 会触发 更新选中的实体数据的方法

checkboxFormatter(cell,row) {
    return <input bsStyle="primary" type="checkbox" onClick={this.props.formatPostCollectionList.bind(this,row)}></input>
  }

更新选中实体数据的方法，在action中编写

export function formatPostCollectionList(row) {
  return(dispatch, getState) => {
    let postCollectionId = row.postCollectionId; //获取每一行的ID
    let state = getState().postCollectionState;  //从postCollectionState（）中拿到state并赋值给全局state
    let postCollections = state.postCollections; // 红色字体标注为实体中的数据容器
    let postCollectionItem = {
      postCollectionId:postCollectionId     //实体中的数据ID
    };
    if (postCollections) {  //postCollections 实体数据，可能 有数据
      let index = -1;   // index = -1 指默认实体中没有数据
      for (let i = 0 ;i < postCollections.length ;i++) { //如果实体中有数据，则循环
        let postCollection = postCollections[i];    //拿实体中的数据，给变量postCollection
        let id = postCollection.postCollectionId;   //从拿到的实体数据中，取每一个ID，方法对比（选中的数据与实体中的数据对比）
        if (postCollectionId == id) { //如果实体中的ID == 选中的ID
          index = i;         //把实体中选中的的数据 赋值为 i 
        }
      }
      if (index > -1) {         //如果实体的数据存在，不为空
        postCollections.splice(index,1);  //删除实体对象中index位置中的一个数据
      } else {
        postCollections.push(postCollectionItem); //如果实体数据为空，则push实体中的ID数据
      }
    } else {
      postCollections = []; // 第一次render时，实体数据可能为空 / 为undefined，那么将它定义为一个数组
      postCollections.push(postCollectionItem);  //给这个空数组push数据
    }
    dispatch(formatPostCollectionListSetter(postCollections));
  }
}
function formatPostCollectionListSetter(params){
  return {
    type:SET_POST_COLLECTIONS,
    data:{postCollections:params} //红色变量为实体数据
  }
}

选中实体数据后，点击删除按钮，会触发deletePostCollections 删除方法

export const DELETE_POST_COLLECTIONS = 'DELETE_POST_COLLECTIONS';
export function deletePostCollections(){  //点击删除按钮后，触发deletePostCollections删除方法
  return(dispatch, getState) => {
    let state = getState().postCollectionState;
    let activityId = state.activityId;
    let postCollections = state.postCollections; //实体对象从state中获取
    Api.deletePostCollections(activityId ,postCollections, params => {  //调删除接口的方法
      dispatch(deletePostCollectionsSetter(params));
    });
  }
}
function deletePostCollectionsSetter(params){
  alertPre("",params);
  return {
    type:DELETE_POST_COLLECTIONS,
    data:{deletePostCollectionsResponse:params} //deletePostCollectionsResponse 选中的要删除的数据容器
  }
}

把删除数据的方法绑定到删除按钮，绑定前根据删除钮钮的状态，判断是否可点击

render(){
    let dis = true; //删除按钮状态，默认为禁用状态，返回为true
    let postCollections = this.props.postCollectionState.postCollections; //获取实体中的数据
    if (typeof(postCollections) == 'undefined' || postCollections.length == 0) {  //如果实体中的数据为 undefined 或者 为空
      dis = true; //如果实体中没有数据，则按钮状态为禁用状态
    } else {
      dis = false; //如果实体中有数据，选中后的状态为可点击状态
    }

    const buttonsInstanceDel = (
      <ButtonToolbar className="mb10">
        <Button bsStyle="danger" disabled={dis} onClick={this.props.deletePostCollections}>删除贴子集</Button> //红色字体标为 删除数据的方法
      </ButtonToolbar>
    );

    return(
      <div>
        {buttonsInstanceDel}
      </div>
    )
  }

删除成功后，调用生命周期的方法，在表查询组件中，更新表数据。如果删除成功，则执行两个方法：清空实体数据与刷新加载数据

componentDidUpdate () {
    let deletePostCollectionsResponse = this.props.postCollectionState.deletePostCollectionsResponse; //deletePostCollectionsResponse 删除的数据
    if (typeof(deletePostCollectionsResponse) != 'undefined') { //如果这个数据类型不是 undefined
      let status = deletePostCollectionsResponse.status;   //获取到这个删除的数据状态
      if (200 == status) {                  //如果为200，删除成功
        this.props.clearPostCollection();          //加载清空实体数据的方法 clearPostCollection，就是从实体数据中删除被删除的数据
        let param = {
          activityId:this.props.postCollectionState.activityId  
        }
        this.props.initPostCollection(param);       //根据ID重新加载剩余的数据
      }
    }
  }

清空实体

export const CLEAR_POST_COLLECTION = 'CLEAR_POST_COLLECTION';
export function clearPostCollection(){
  return {
    type: CLEAR_POST_COLLECTION,
    data:{  //实体中的数据名称
      addPostCollectionResponse:{},
      postCollections:[],
      deletePostCollectionsResponse:{},
      postCollectionName:'',
      postNumber:'0',
      postFieldList:[]
    }
  }
}

所有代码结构，含一个api，一个action，两个component，一个reducers

api(查询 / 删除)

//查询
searchPostCollectionByActivityId(activityId, callback) {
    const queryParam = `/tob/post/search?activeId=${activityId}`;
    Config.get(queryParam, callback);
  }

//删除
deletePostCollections (activityId ,params, callback) {
    let path = `/tob/post/deletePostCollection/${activityId}`;
    Config.deleteWithNoResponse(path ,params, callback);
  }

action(查询方法 / 更新选中实体数据方法 / 删除方法 / 清空实体数据方法 )

//查询表数据
export function initPostCollection(row){
  return (dispatch, getState) => {
    let activityId = row.activityId;
    Api.searchPostCollectionByActivityId(activityId, params => {
      dispatch(initPostCollectionSetter(activityId,params));
    });
  }
}
function initPostCollectionSetter(activityId,params){
  return {
    type:INIT_POST_COLLECTION,
    activityId:activityId,
    data:{postCollectionEntityList:params}
  }
}

//更新选中实体数据
export function formatPostCollectionList(row) {
  return(dispatch, getState) => {
    let postCollectionId = row.postCollectionId;
    let state = getState().postCollectionState;
    let postCollections = state.postCollections;
    let postCollectionItem = {
      postCollectionId:postCollectionId
    };
    if (postCollections) {
      let index = -1;
      for (let i = 0 ;i < postCollections.length ;i++) {
        let postCollection = postCollections[i];
        let id = postCollection.postCollectionId;
        if (postCollectionId == id) {
          index = i;
        }
      }
      if (index > -1) {
        postCollections.splice(index,1);
      } else {
        postCollections.push(postCollectionItem);
      }
    } else {
      postCollections = [];
      postCollections.push(postCollectionItem);
    }
    dispatch(formatPostCollectionListSetter(postCollections));
  }
}
function formatPostCollectionListSetter(params){
  return {
    type:SET_POST_COLLECTIONS,
    data:{postCollections:params}
  }
}

//删除方法
export const DELETE_POST_COLLECTIONS = 'DELETE_POST_COLLECTIONS';
export function deletePostCollections(){
  return(dispatch, getState) => {
    let state = getState().postCollectionState;
    let activityId = state.activityId;
    let postCollections = state.postCollections;
    Api.deletePostCollections(activityId ,postCollections, params => {
      dispatch(deletePostCollectionsSetter(params));
    });
  }
}
function deletePostCollectionsSetter(params){
  alertPre("",params);
  return {
    type:DELETE_POST_COLLECTIONS,
    data:{deletePostCollectionsResponse:params}
  }
}

//清空实体数据
export const CLEAR_POST_COLLECTION = 'CLEAR_POST_COLLECTION';
export function clearPostCollection(){
  return {
    type: CLEAR_POST_COLLECTION,
    data:{
      addPostCollectionResponse:{},
      postCollections:[],
      deletePostCollectionsResponse:{},
      postCollectionName:'',
      postNumber:'0',
      postFieldList:[]
    }
  }
}

component(BtnDelData.js / TableData.js (checkbox))

//删除按钮组件
import React,{Component} from 'react';
import {render} from 'react-dom';
import ReactBootstrap , {ButtonToolbar,Button,Pagination} from 'react-bootstrap';

export default class BtnDelData extends Component {
  constructor(props){
    super(props);
  }

  render(){
    let dis = true;
    let postCollections = this.props.postCollectionState.postCollections;
    if (typeof(postCollections) == 'undefined' || postCollections.length == 0) {
      dis = true;
    } else {
      dis = false;
    }

    const buttonsInstanceDel = (
      <ButtonToolbar className="mb10">
        <Button bsStyle="danger" disabled={dis} onClick={this.props.deletePostCollections}>删除贴子集</Button>
      </ButtonToolbar>
    );

    return(
      <div>
        {buttonsInstanceDel}
      </div>
    )
  }
}

//表组件
import React, {Component} from 'react';
import {render} from 'react-dom';
import ReactBootstrap , {ButtonToolbar,Button,Pagination,Grid,Row,Col} from 'react-bootstrap';
import { Router, Route, IndexRoute, Link, IndexLink, browserHistory } from 'react-router';
const ACTIVE = { color: 'red' };
import {sessionSetItem,sessionGetItem} from 'storage';

import BtnAddData from './BtnAddData.js';
import BtnDelData from './BtnDelData.js';

//引用公共组件
import TableExit from 'public_component/table/TableExit.js';
import TableCloumnsExit from 'public_component/table/TableCloumnsExit.js';

//跳转路径
import {invitation_main_path,post_collection_main_path,activity_main_path,question_bank_main_path} from '/build/config.js';



export default class TableData extends Component {
  constructor(props){
    super(props);
  }

  componentDidMount() {
    const param = this.props.queryData;
    console.log("param === " + param);
    this.props.initPostCollection(param);
  }

  componentDidUpdate () {
    let deletePostCollectionsResponse = this.props.postCollectionState.deletePostCollectionsResponse;
    if (typeof(deletePostCollectionsResponse) != 'undefined') {
      let status = deletePostCollectionsResponse.status;
      if (200 == status) {
        this.props.clearPostCollection();
        let param = {
          activityId:this.props.postCollectionState.activityId
        }
        this.props.initPostCollection(param);
      }
    }
  }

  //修改
  activeFormatter(cell,row) {
    return <Button bsStyle="primary" onClick={this.props.sendPostCollection.bind(null,row)}>推送</Button>

  }

  checkboxFormatter(cell,row) {
    return <input bsStyle="primary" type="checkbox" onClick={this.props.formatPostCollectionList.bind(this,row)}></input>
  }

  //修改
  postCollectionFormatter(cell,row) {
    return <Link to={{ pathname:post_collection_main_path, query: row}} activeStyle={ACTIVE}>修改</Link>
  }

  questionBankFormatter(cell,row) {
    return <Link to={{ pathname: question_bank_main_path, query: row}} activeStyle={ACTIVE} >查看题库</Link>
  }

  render(){

    let postCollectionEntityList = [
      {
        postCollectionName:'',
        postCollectionId:'',
        activityId:''
      }
    ];

    if (this.props.postCollectionState.postCollectionEntityList) {
      postCollectionEntityList = this.props.postCollectionState.postCollectionEntityList;
      console.log("postCollectionEntityList" + postCollectionEntityList);
    }

    //let postCollectionEntityList = this.props.postCollectionState.postCollectionEntityList;

    //添加与删除
    const gridInstance = (
      <Grid className="mb5">
        <Row className="show-grid">
          <Col sm={1} mdPush={-7}><BtnAddData {...this.props} activityParam={this.props.queryData} /></Col>
          <Col sm={1}><BtnDelData {...this.props} /></Col>
        </Row>
      </Grid>
    );

    //acb 表数据
    return(
      <div>
        {gridInstance}
        <TableExit data={postCollectionEntityList} acb={this.props.initPostCollection}>
          <TableCloumnsExit dataField="alter" dataFormat={this.checkboxFormatter.bind(this)}>选择</TableCloumnsExit>
          <TableCloumnsExit dataField="activityTitle">活动名称</TableCloumnsExit>
          <TableCloumnsExit dataField="postCollectionName">帖子集名称</TableCloumnsExit>
          <TableCloumnsExit dataField="postCollectionId">帖子集编号</TableCloumnsExit>
          <TableCloumnsExit dataField="active" dataFormat={this.postCollectionFormatter}>修改</TableCloumnsExit>
          <TableCloumnsExit dataField="send" dataFormat={this.activeFormatter.bind(this)}>发送</TableCloumnsExit>
          <TableCloumnsExit dataField="send" dataFormat={this.questionBankFormatter.bind(this)}>题库</TableCloumnsExit>
        </TableExit>
        <ButtonToolbar>
          <Link className="btn btn-primary" to={{ pathname:activity_main_path}}>返回到活动界面</Link>
        </ButtonToolbar>
      </div>
    );
  }
}

reducers (state合并)

以上为删除功能的用法。

这篇react.js CMS 删除功能的实现方法就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持亿速云。

react.js CMS 删除功能的实现方法

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