VueJs在select选项中设置自定义属性值

<select name='unit[]' required @change='change_unit($event)'>
    <option v-for='(unit) in line.units' price='66'  :value='unit.get_unit_id.id'>@{{unit['get_unit_id']['name']}}</option>
</select>

change_unit:function(event)
{
    let get_val = event.target.selectedOptions[0].getAttribute("price");
    console.log("Value from the Attribute: ", get_val)
}

<option v-for='(unit) in line.units' price='unit.price' >