获取el-radio-group的索引获取el-radio-group的索引数据结构获取el-radio-group的

<span  v-for="(value,key) in schoolList">
     <el-radio-group v-model="searchForm.schoolId" @change="changeGrade(value,key)" >
         <el-radio-button :label="value.schoolId" :key="key" >{{value.schoolName}} </el-radio-button>
     </el-radio-group>
</span>

 changeGrade(val,key){
        console.log(val,key,'key')
   }

数据结构
[{schoolId:11,shchoolName:'aa'},{schoolId:22,shchoolName:'bb'},]