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：
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
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}
}
}

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
}
}

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。