element 级联 父传子

html代码例子

父组件

	<el-cascader
		style="width: 100%"
		@change="unitIdChange"
		:options="unitOptions"
		filterable
		v-model="formInline.unitId"
		:props="unitProps"
	    />
	</el-form-item>
	//改变级联传值到这个组件里面
	<resource-view :resourceList="formInline.resourceList" ref="resourceRef"></resource-view>

子组件

	<el-form label-position="right" label-width="auto" :model="formData" :disabled="flag == '1'" :rules="rules" ref="addRef">
		<el-table :data="resourceList" style="width: 100%; margin: 10px 0" max-height="250" border>
			<el-table-column fixed prop="ipAddr" label="IP地址" width="250">
				<template #default="{ row, $index }">
					<el-form-item style="width: 100%" :prop="`resourceList.${$index}.ipAddr`" :rules="rules.ipAddr">
						<el-input type="text" :disabled="flag == '1'" placeholder="输入IP地址" v-model="row.ipAddr"></el-input>
					</el-form-item>
				</template>
			</el-table-column>
			<el-table-column prop="locationAreaId" label="所在网络区域">
				<template #default="{ row, $index }">
					<el-form-item :prop="`resourceList.${$index}.locationAreaId`" style="width: 100%">
						<el-tree-select
							style="width: 100%"
							:disabled="flag == '1'"
							v-model="row.locationAreaId"
							:data="locationAreaIdOptions"
							node-key="networkId"
							:render-after-expand="false"
							:check-strictly="true"
							:props="networkIdProps"
						/>
					</el-form-item>
				</template>
			</el-table-column>
			<el-table-column prop="cloudPlatformId" label="所属云平台">
				<template #default="{ row, $index }">
					<el-form-item :prop="`resourceList.${$index}.cloudPlatformId`" style="width: 100%">
						<el-tree-select
							style="width: 100%"
							:disabled="flag == '1'"
							v-model="row.cloudPlatformId"
							:data="cloudPlatformIdOptions"
							node-key="cloudId"
							:render-after-expand="false"
							:check-strictly="true"
							:props="cloudProps"
						/>
					</el-form-item>
				</template>
			</el-table-column>
			<el-table-column prop="applicationId" label="系统项目">
				<template #default="{ row, $index }">
					<el-form-item :prop="`resourceList.${$index}.applicationId`" style="width: 100%">
						<el-select :disabled="flag == '1'" v-model="row.applicationId" style="width: 100%" placeholder="请选择">
							<el-option v-for="item in applicationOptions" :key="item.value" :label="item.label" :value="item.value" />
						</el-select>
					</el-form-item>
				</template>
			</el-table-column>
			<el-table-column fixed="right" label="操作" width="120" v-if="!flag">
				<template #default="scope">
					<el-button link type="danger" size="small" @click.prevent="deleteRow(scope.$index)"> 删除 </el-button>
				</template>
			</el-table-column>
		</el-table>
	</el-form>
	<el-button v-if="!flag" class="mt-4" style="width: 100%; margin-bottom: 10px" @click="onAddItem">添加</el-button>
</template>

ts

// 设置级联选择器的属性
const unitProps = {
	checkStrictly: true,//是否严格的遵守父子节点不互相关联
	emitPath: false,//是否返回数组
	filterable: true//是否可以搜索
};
//改变级联的值并且传值
const unitIdChange = (val: any) => {
//传true为新增，false为编辑
	resourceRef.value.getApplyList(val, true);
};

子组件接收的方法
//获取应用系统
const getApplyList = (val: any, isChange: any) => {
	//判断是否是change，是change才清空
	if (isChange) {
		resourceList.value = resourceList.value.map((item: any) => {
			item.applicationId = "";
			return item;
		});
	}
	getApplyListByUnitId(val).then((res: any) => {
		applicationOptions.value = res.data;
	});
};

例子展示

单位级联展示

根据单位加载系统项目