如何在ember.js中创建一条记录，同时将所需的数据抛给它的关系？

// app/models/post.js
import Model, { attr } from '@ember-data/model';

export default class PostModel extends Model {
  @attr('string') title;
  @attr('string') body;
}

// 在某个组件或控制器中
import Route from '@ember/routing/route';

export default class PostsNewRoute extends Route {
  model() {
    return this.store.createRecord('post', {
      title: 'New Post',
      body: 'This is the body of the new post.'
    });
  }
}

// app/models/post.js
import Model, { attr, hasMany } from '@ember-data/model';

export default class PostModel extends Model {
  @attr('string') title;
  @attr('string') body;

  @hasMany('comment', { async: false, inverse: 'post' }) comments;
}

// app/models/comment.js
import Model, { attr, belongsTo } from '@ember-data/model';

export default class CommentModel extends Model {
  @attr('string') text;

  @belongsTo('post', { async: false, inverse: 'comments' }) post;
}

// 在某个组件或控制器中
import Route from '@ember/routing/route';

export default class PostsNewRoute extends Route {
  model() {
    let post = this.store.createRecord('post', {
      title: 'New Post',
      body: 'This is the body of the new post.'
    });

    let comment = this.store.createRecord('comment', {
      text: 'This is a comment on the new post.',
      post: post
    });

    post.get('comments').pushObject(comment);

    return post;
  }
}

// 在某个组件或控制器中
import Route from '@ember/routing/route';

export default class PostsNewRoute extends Route {
  model() {
    // ... 创建记录的代码 ...
  }

  setupController(controller, model) {
    super.setupController(controller, model);
    controller.set('isSaving', false);
  }

  actions = {
    savePost(post) {
      this.controller.set('isSaving', true);
      post.save().then(() => {
        this.transitionTo('posts');
      }).catch((error) => {
        // 处理错误
      }).finally(() => {
        this.controller.set('isSaving', false);
      });
    }
  };
}