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react.js CMS 删除功能的实现

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：
1. 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
  1. 定义每一行的实体为一个数组，用变量 postCollections 表示
  2. 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；
  3. 参数为 row ；
2. 点击删除按钮后，使用 componentDitUpdate() 生命周期方法，在组件更新后调用。
  1. 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；
  2. 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

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);
    }

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}
    }
}

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
    }
}

6. 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>
        )
    }

7. 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。

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原文地址：https://www.cnblogs.com/baiyygynui/p/5486188.html