el-select获取当前选中值的所有值通过change事件获取注意： key值v-model获取到的值和 valu

<el-select v-model="importForm.vendorId" style="width: 50%;" value-key="deptId" 
placeholder="请选择" @change="vendorChenage($event)">
     <el-option v-for="item in vendorList" :key="item.deptId" :label="item.name" :value="item"</el-option>
</el-select>

vendorChenage(event) {
  console.log(event)
  this.uploadParam.vendorId = event.deptId
  this.uploadParam.vendorName = event.name
  this.uploadParam.vendorRate = event.rate
},

通过change事件获取注意： key值v-model获取到的值和 value值获取到所有的参数值