EmberJS -如何部分嵌套父路由和子路由？

// app/router.js

Router.map(function() {
  this.route('parent', function() {
    this.route('child');
  });
});

<!-- app/templates/parent.hbs -->

<h1>Parent Route</h1>

{{outlet}}

<!-- app/templates/parent/child.hbs -->

<h2>Child Route</h2>

// app/routes/parent.js

import Route from '@ember/routing/route';

export default class ParentRoute extends Route {
  model() {
    // 父路由的模型数据
  }
}

// app/routes/parent/child.js

import Route from '@ember/routing/route';

export default class ParentChildRoute extends Route {
  model() {
    // 子路由的模型数据
  }
}

<!-- app/templates/application.hbs -->

{{outlet}}