之前写动态表单遇到过坑，就是用index下标做key会导致bug，而且很严重！
今天有空写下文章记录下：怎么处理和逻辑
我用的是antd3的版本，3和4的表单有点不一样，不过差别应该不大。
需求：
1、选择类型切换展示固定的模板
2、通过新增字段可以动态增减表单里面的每一行
3、控制每一行的字段是否需要必填
4、编辑时候回填参数
效果图：
部分关键代码：
import react, { component } from 'react'; import styles from './index.less'; import { table, button, select, popconfirm, modal, form, input, radio, row, col, tooltip, icon, message, pagination, inputnumber, } from 'antd'; const option = select.option; const formitem = form.item; let id = 0; @form.create() class index extends component { marketid = 0; state = { selecttype: '', ordertype: 1, //文章1 地图2 typeloading: false, isedit: false, lookvisible: false, visible: false, pagesize: 10, pagenum: 1, keyword: '', row: {}, typelist: {}, mock: {}, maptype: [{ 'fieldname': 'name', 'isimg': 0, 'order': 0, 'remarks': '名称', }, { 'fieldname': 'label', 'isimg': 0, 'order': 0, 'remarks': '标签', }, { 'fieldname': 'lon', 'isimg': 0, 'order': 0, 'remarks': '经度', }, { 'fieldname': 'lat', 'isimg': 0, 'order': 0, 'remarks': '纬度', }], articletype: [{ 'fieldname': 'name', 'isimg': 0, 'order': 0, 'remarks': '名称', }, { 'fieldname': 'label', 'isimg': 0, 'order': 0, 'remarks': '标签', }], }; /** * 将动表单态值生成需要的数据格式 * @param values * @returns {[]} */ createvalues = (values) => { const { row } = this.state; const data = []; const newvalues = { // 用新的对象承载提交的数据 ...values, }; const fieldnamedata = []; // 保存fieldname值 const remarksdata = []; // 保存remarks值 const isimgdata = []; // 保存isimg值 const orderdata = []; // 保存orderdata值 const fieldname = regexp(/fieldname/); const remarks = regexp(/remarks/); const isimg = regexp(/isimg/); for (const key in newvalues) { if (fieldname.test(key)) { fieldnamedata.push(newvalues[key]); } } for (const key in newvalues) { if (remarks.test(key)) { remarksdata.push(newvalues[key]); } } for (const key in newvalues) { if (isimg.test(key)) { isimgdata.push(newvalues[key]); } } for (const key in newvalues) { if (isimg.test(key)) { orderdata.push(newvalues[key]); } } fieldnamedata.foreach((item, index) => { data.push({ fieldname: item, remarks: remarksdata[index], isimg: isimgdata[index], order: orderdata[index], id: row.datatype ? row.datatype.id : '', }); }); return data; }; handleok = e => { this.props.form.validatefields((err, values) => { if (!err) { const { row, isedit } = this.state; const params = { datatype: { name: values.name, type: values.type, id: row.datatype ? row.datatype.id : '', }, typefields: [], }; params.typefields = this.createvalues(values); if (isedit) { edittype(params).then(res => { if (res.code === 0) { message.info('修改成功'); this.setstate({ visible: false, isedit: false, }); this.fetchtypelist(); this.props.form.resetfields(); } }); } else { addtype(params).then(res => { if (res.code === 0) { message.info('新增成功'); this.setstate({ visible: false, isedit: false, }); this.fetchtypelist(); this.props.form.resetfields(); } }); } } }); }; lookoredittypemodal = (flag, record) => { const { articletype, maptype } = this.state; if (flag === 'add') { //添加默认为文章模板 this.marketid = articletype.length + 1; //设置动态key标记长度 this.setstate({ visible: true, row: { typefields: articletype }, }); } else if (flag === 'edit') { this.setstate({ visible: true, }); gettype({ datatypeid: record.id }).then(res => { if (res.code === 0) { this.marketid = res.data.typefields.length + 1; //设置动态key标记长度 this.setstate({ row: res.data, isedit: flag === 'edit', }); } }); } else { this.setstate({ lookvisible: true, }); gettype({ datatypeid: record.id }).then(res => { if (res.code === 0) { this.setstate({ row: res.data, }); } }); } }; onchangetype = (value) => { const { form } = this.props; const { ordertype, row, articletype, maptype } = this.state; this.props.form.resetfields(); const params = {}; if (value === 1) { //文章类型 params['typefields'] = articletype; this.marketid = articletype.length + 1; } else { params['typefields'] = maptype; this.marketid = maptype.length + 1; } this.setstate({ row: params, ordertype: value, }); }; //删除方法！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！ removefile = k => { const { form } = this.props; const keys = form.getfieldvalue('keys'); if (keys.length === 1) { return; } form.setfieldsvalue({ keys: keys.filter(key => key !== k), }); }; //添加方法！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！ addfile = () => { const { form } = this.props; const keys = form.getfieldvalue('keys'); const nextkeys = keys.concat(this.marketid++); form.setfieldsvalue({ keys: nextkeys, }); }; judgeistemplet = (data) => { if (!data) { return false; } if ((data.fieldname === 'lat') || (data.fieldname === 'lon') || (data.fieldname === 'label') || (data.fieldname === 'name')) { return true; } }; handlevalidator = (rule, val, callback) => { if (!val) { callback(); } let validateresult = /^[5a-za-z0-9-\_]+$/.test(val); if (!validateresult) { callback('请输入正确表字段'); } callback(); }; columns = [ { title: '类型名称', dataindex: 'name', key: 'name', width: 500, }, { title: '所属类型', dataindex: 'type', key: 'type', render: (text) => { return text === 1 ? '文章' : '地图'; }, }, { title: '操作', dataindex: 'address', key: 'address', render: (text, record) => { return <div> <button type='link' onclick={() => this.lookoredittypemodal('look', record)}>查看</button> <button type='link' onclick={() => this.lookoredittypemodal('edit', record)}>编辑</button> <popconfirm title="确认删除?" onconfirm={() => this.deletetypeclick(record)}> <button type='link'>删除</button> </popconfirm> </div>; }, }, ]; render() { const { selecttype, typeloading, mock, row, isedit, typelist, keyword, lookvisible } = this.state; const { getfielddecorator, getfieldvalue } = this.props.form; let typefields = row.typefields || []; const initdata = []; typefields.foreach((item, index) => {//根据真实数据，设置默认keys数组 initdata.push(index); }); getfielddecorator('keys', { initialvalue: initdata }); //给表单增加keys字段，并设置默认值，这里编辑时候可以生成编辑回填的效果。 const keys = getfieldvalue('keys'); const formitems = keys.map((k) => ( <row gutter={12} key={k} classname={styles.form_row}> <formitem label="字段" key={`fieldname_${k}`}> {getfielddecorator(`fieldname_${k}`, { initialvalue: row.typefields[k] ? row.typefields[k].fieldname : '', validatetrigger: ['onchange', 'onblur'], //校验子节点值的时机 rules: [{ required: true, message: '请输入英文字段!', }, { validator: this.handlevalidator, }], })(<input placeholder="请输入英文字段" max={30} disabled={this.judgeistemplet(row.typefields[k])}/>)} </formitem> <formitem label="名称" key={`remarks_${k}`}> {getfielddecorator(`remarks_${k}`, { initialvalue: row.typefields[k] ? row.typefields[k].remarks : '', validatetrigger: ['onchange', 'onblur'], rules: [{ required: true, message: '请输入中文名称!', }], })(<input placeholder="请输入中文名称" disabled={this.judgeistemplet(row.typefields[k])}/>)} </formitem> <formitem label="排序" key={`order_${k}`}> {getfielddecorator(`order_${k}`, { initialvalue: row.typefields[k] ? row.typefields[k].order : 0, })(<inputnumber style={{width:75}} placeholder="排序" />)} </formitem> <formitem label="图片" key={k}> {getfielddecorator(`isimg_${k}`, { initialvalue: row.typefields[k] ? row.typefields[k].isimg : 0, rules: [{ required: true, }], })(<radio.group disabled={this.judgeistemplet(row.typefields[k])}> <radio value={0}>否</radio> <radio value={1}>是</radio> </radio.group>)} </formitem> {!this.judgeistemplet(row.typefields[k]) ? ( <icon type="minus-circle" onclick={() => this.removefile(k)} title='删除'/> ) : null} </row> )); return ( <div classname={styles.wrap_type}> <modal title="类型管理" visible={this.state.visible} onok={this.handleok} oncancel={this.handlecancel} width={890} // classname={styles.modal_type} maskclosable={false} > <form layout='inline'> <row style={{ textalign: 'center', marginbottom: 14 }}> <formitem label="选择类型"> {getfielddecorator('type', { initialvalue: row.datatype ? row.datatype.type : 1, rules: [{ required: true, }], })(<select onchange={this.onchangetype} disabled={isedit} style={{ width: 200 }}> <option value={1}>文章类型</option> <option value={2}>地图类型</option> <option value={3} disabled={true}>文件类型</option> </select>)} </formitem> <formitem label="类型名称"> {getfielddecorator('name', { initialvalue: row.datatype ? row.datatype.name : '', rules: [{ required: true, message: '请输入类型名称!', }], })(<input placeholder="请输入类型名称" style={{ width: 200 }}/>)} </formitem> </row> {formitems} <div style={{ margin: 'auto', textalign: 'center' }}> <button icon="plus" onclick={this.addfile} style={{ margintop: 10 }}>新增字段</button> </div> </form> </modal> </div> ); } } export default index;
关键地方是设置一个marketid作为动态添加的key，然后用他的值作为动态key。（千万不要用数组的下标index来作为key）！
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