el-select如何获取当前选中的对象所有(item)数据

const optionsList = [
	{
		name: '',
		id: '',
		class_name:'',
		class_type: '',
		english_name: '',
		is_default: false,
		online_worker_count: 0,
		time: "2022-12-26 16:30:21",
	}
	...
]

<el-form-item v-for="(workerItem, index) in form.data.worker_groups" :key="'workerGroups_'+ index"
                          style="margin-top: 10px">
	<el-select v-model="form.data.worker_groups[index]" value-key="name" filterable clearable placeholder="请选择">
		<el-option
		   v-for="item in data.workerGroups"
		     :key="item.id"
		     :label="item.name"
		     :value="item">
		 </el-option>
	</el-select>
</el-form-item>

<template>
  <!--v-model绑定一个对象值，指定value-key标识-->
  <el-select v-model="obj" value-key="id" @change="change" placeholder="请选择">
    <el-option
        v-for="(item,index) in options"
        :key="index"
        :label="item.name"
        <!--绑定整个对象item-->
        :value="item">
      {{ item.name }}
    </el-option>
  </el-select>
</template>

<script>
export default {
  name: "test",
  data() {
    return {
      options: [{
        id: 1,
        name: '黄金糕'
      }, {
        id: 2,
        name: '双皮奶'
      }, {
        id: 3,
        name: '蚵仔煎'
      }, {
        id: 4,
        name: '龙须面'
      }, {
        id: 5,
        name: '北京烤鸭'
      }],
      obj: {}
    }
  },
  methods: {
    change(item) {
      console.log(item);// 打印整个对象
    }
  }
}
</script>