如何在Ember中选择默认单选按钮？

{{input type="radio" name="color" value="red"}} Red
{{input type="radio" name="color" value="blue"}} Blue
{{input type="radio" name="color" value="green"}} Green

import Component from '@ember/component';
import { computed } from '@ember/object';

export default Component.extend({
  selectedColor: 'red', // 默认选中的颜色为红色

  // 根据选中的颜色值返回对应的单选按钮是否选中的布尔值
  isRedSelected: computed('selectedColor', function() {
    return this.selectedColor === 'red';
  }),

  isBlueSelected: computed('selectedColor', function() {
    return this.selectedColor === 'blue';
  }),

  isGreenSelected: computed('selectedColor', function() {
    return this.selectedColor === 'green';
  }),

  actions: {
    // 当选择不同的单选按钮时，更新选中的颜色值
    updateSelectedColor(color) {
      this.set('selectedColor', color);
    }
  }
});

{{input type="radio" name="color" value="red" checked=isRedSelected change=(action "updateSelectedColor" "red")}} Red
{{input type="radio" name="color" value="blue" checked=isBlueSelected change=(action "updateSelectedColor" "blue")}} Blue
{{input type="radio" name="color" value="green" checked=isGreenSelected change=(action "updateSelectedColor" "green")}} Green