ember.js - createRecord 与belongsTo 关联

Question

我尝试存储具有belongsTo 关联的记录，但关联的ID 始终为空:

客户模型

Docket.Customer = DS.Model.extend({
  name:        DS.attr('string'),
  initial:     DS.attr('string'),
  description: DS.attr('string'),
  number:      DS.attr('string'),
  archived:    DS.attr('boolean'),
  projects:    DS.hasMany('project',{ async: true })
});

项目模型

Docket.Project = DS.Model.extend({
  name:        DS.attr('string'),
  description: DS.attr('string'),
  number:      DS.attr('string'),
  archived:    DS.attr('boolean'),
  customer:    DS.belongsTo('customer')
});

在 ProjectsController 中保存操作

var _this = this;

// create new record
var project = this.store.createRecord('project', this.getProperties('name','number', 'description', 'archived'));

// add customer with id 22 to project
this.store.find('customer', 22).then(function(customer) {
  project.set('customer', customer);
});

// save if validation passes, otherwise show errors
project.save().then(function(){
  _this.resetAndCloseForm(form);
}, function(response){
  _this.set('errors',response.errors);
});

发送到服务器的 json 始终是这样的:

archived: false
customer_id: null
description: null
name: "foobar"
number: null

我想在选择框中选择项目的客户。是否有任何智能方法可以获取所选客户作为记录，或者我是否必须通过 ID 加载它？

{{view Ember.Select
    viewName="select"
    contentBinding="customers"
    optionLabelPath="content.name"
    optionValuePath="content.id"
    prompt="Pick a customer:"
    selectionBinding="selectedCustomer"
}}

Answer 1

这是旧版本的 ember 数据，还是您有自定义序列化程序，因为它应该在没有 _id 的情况下发送它。尝试升级或显示您的序列化器。

并且您在解决查找之前保存。

// add customer with id 22 to project
this.store.find('customer', 22).then(function(customer) {
  project.set('customer', customer);


  // save if validation passes, otherwise show errors
  project.save().then(function(){
    _this.resetAndCloseForm(form);
  }, function(response){
    _this.set('errors',response.errors);
  });

});

看起来 selectedCustomer 有记录。

// create new record
var project = this.store.createRecord('project', this.getProperties('name','number', 'description', 'archived'));

 project.set('customer', this.get('selectedCustomer'));

// save if validation passes, otherwise show errors
project.save().then(function(){
  _this.resetAndCloseForm(form);
}, function(response){
  _this.set('errors',response.errors);
});

您还可以设置optionValuePath='content'