为未保存记录的关系创建记录

Question

我有以下场景：

1-为多页表单创建记录的父路由

routes/feedback.js
model() {
  return this.get('store').createRecord('feedback');
},

2-子路由return两个模型，问题是不相关的模型return动态路由中显示的多个问题。并在其页面中创建回答这些问题的记录

routes/feedback/question.js
model(params) {
    return Ember.RSVP.hash({
      question: this.get('store').findRecord('question', params.question_id),
      answer: this.get('store').createRecord('answer')
    })

  },

3- 答案有 belongsTo 关系反馈

models/answer.js
choice: DS.attr(),   // receives data from question through a controller
feedback: DS.belongsTo()

models/feedback.js
submittedAt: DS.attr(),
answers: DS.hasMany()

4- 数据通过控制器从问题传递到答案记录

controllers/feedback/question.js
getChoice(choice) {
  let answer = this.get('model.answer');
  let questionId = this.get('model.question').get('id');

  answer.setProperties({
    choice: choice,
    questionId: questionId,
    // feedback: should relationship go here?
  })
  answer.save()

controllers/feedback.js
newModel: null,
actions: {
  save(newModel) {
    newModel.save()
  }
}

那么如果feeback还没有ID，应该如何分配关系呢？

我也可以在保存反馈的新模型之前保存答案吗？实际上，我尝试将 getChoice 操作冒泡到父控制器，但同样的空记录问题。

Answer 1

您可以在 feedback/question 中注入 feedback 控制器并访问 feedback 模型并使用它。

feedback: Ember.inject.controller('feedback')

和

  let answer = this.get('model.answer');
  let questionId = this.get('model.question').get('id');
  let feedback = this.get('feedback').get('model');

  answer.setProperties({
    choice,
    questionId,
    feedback 
  })

- 或者从反馈控制器获取反馈记录，可以在feedback/question route

中使用this.modelFor('feedback')

routes/feedback/question.js
model(params) {
    return Ember.RSVP.hash({
      question: this.get('store').findRecord('question', params.question_id),
      answer: this.get('store').createRecord('answer'),
      feedback: this.modelFor('feedback')
    })
  },

和

  let answer = this.get('model.answer');
  let questionId = this.get('model.question').get('id');
  let feedback = this.get('feedback');

  answer.setProperties({
    choice,
    questionId,
    feedback 
  })

为未保存记录的关系创建记录

createRecord for relationship of unsaved record

ember.js