如何使用belongsTo创建记录与Ember.js的关联&；轨道？

我在使用belongsTo关联时遇到问题，并使用Ember.js和Ember数据向Rails控制器发送外键。我的Ember.js控制器将向Rails控制器发送项目名称，但不发送client_id值。在Rails控制器中，params[：project][：client_id]的值为nil

救命啊！我哪里做错了

型号：

DA.Project = DS.Model.extend
  name: DS.attr('string')
  client: DS.belongsTo('DA.Client')

DA.Client = DS.Model.extend
  name: DS.attr('string')
  projects: DS.hasMany('DA.Project')

DA.ProjectsController = Em.ArrayController.extend  
  createProject: (project) ->
    @transaction = DA.store.transaction()
    p = @transaction.createRecord(DA.Project, project)
    validation_errors = p.validate()

    if validation_errors
      DA.displayError validation_errors
    else
      @transaction.commit()

DA.ProjectsNew = Em.View.extend
  tagName: 'form'
  templateName: 'projects/new'

  init: ->
    @_super()

  didInsertElement: ->
    @_super()

  submit: (event) ->
    event.preventDefault()
    project = {}
    project.name = @get('name')
    project.client = @get('client_id')

    DA.ProjectsController.createProject(project)

{{view Em.TextField valueBinding="view.name" placeholder="Project Name" tabindex="1"}}
{{view Em.TextField valueBinding="view.client_id" placeholder="Client ID" tabindex="2"}}
<button type="submit">Create</button>

控制器：

DA.Project = DS.Model.extend
  name: DS.attr('string')
  client: DS.belongsTo('DA.Client')

DA.Client = DS.Model.extend
  name: DS.attr('string')
  projects: DS.hasMany('DA.Project')

DA.ProjectsController = Em.ArrayController.extend  
  createProject: (project) ->
    @transaction = DA.store.transaction()
    p = @transaction.createRecord(DA.Project, project)
    validation_errors = p.validate()

    if validation_errors
      DA.displayError validation_errors
    else
      @transaction.commit()

DA.ProjectsNew = Em.View.extend
  tagName: 'form'
  templateName: 'projects/new'

  init: ->
    @_super()

  didInsertElement: ->
    @_super()

  submit: (event) ->
    event.preventDefault()
    project = {}
    project.name = @get('name')
    project.client = @get('client_id')

    DA.ProjectsController.createProject(project)

{{view Em.TextField valueBinding="view.name" placeholder="Project Name" tabindex="1"}}
{{view Em.TextField valueBinding="view.client_id" placeholder="Client ID" tabindex="2"}}
<button type="submit">Create</button>

查看：

DA.Project = DS.Model.extend
  name: DS.attr('string')
  client: DS.belongsTo('DA.Client')

DA.Client = DS.Model.extend
  name: DS.attr('string')
  projects: DS.hasMany('DA.Project')

DA.ProjectsController = Em.ArrayController.extend  
  createProject: (project) ->
    @transaction = DA.store.transaction()
    p = @transaction.createRecord(DA.Project, project)
    validation_errors = p.validate()

    if validation_errors
      DA.displayError validation_errors
    else
      @transaction.commit()

DA.ProjectsNew = Em.View.extend
  tagName: 'form'
  templateName: 'projects/new'

  init: ->
    @_super()

  didInsertElement: ->
    @_super()

  submit: (event) ->
    event.preventDefault()
    project = {}
    project.name = @get('name')
    project.client = @get('client_id')

    DA.ProjectsController.createProject(project)

{{view Em.TextField valueBinding="view.name" placeholder="Project Name" tabindex="1"}}
{{view Em.TextField valueBinding="view.client_id" placeholder="Client ID" tabindex="2"}}
<button type="submit">Create</button>

模板：

DA.Project = DS.Model.extend
  name: DS.attr('string')
  client: DS.belongsTo('DA.Client')

DA.Client = DS.Model.extend
  name: DS.attr('string')
  projects: DS.hasMany('DA.Project')

DA.ProjectsController = Em.ArrayController.extend  
  createProject: (project) ->
    @transaction = DA.store.transaction()
    p = @transaction.createRecord(DA.Project, project)
    validation_errors = p.validate()

    if validation_errors
      DA.displayError validation_errors
    else
      @transaction.commit()

DA.ProjectsNew = Em.View.extend
  tagName: 'form'
  templateName: 'projects/new'

  init: ->
    @_super()

  didInsertElement: ->
    @_super()

  submit: (event) ->
    event.preventDefault()
    project = {}
    project.name = @get('name')
    project.client = @get('client_id')

    DA.ProjectsController.createProject(project)

{{view Em.TextField valueBinding="view.name" placeholder="Project Name" tabindex="1"}}
{{view Em.TextField valueBinding="view.client_id" placeholder="Client ID" tabindex="2"}}
<button type="submit">Create</button>

{{view Em.TextField valueBinding=“view.name”placeholder=“Project name”tabindex=“1”}
{{view Em.TextField valueBinding=“view.client_id”placeholder=“client id”tabindex=“2”}
创造

在

submit

功能中，

project.client

被分配一个id，而不是

DA.client

实例。

---

如果假定

DA.Client

实例是预先存在的，则可以通过

DA.store.find（DA.Client，@get（'Client_id'））

获取该实例。请注意，根据绑定对象的方式，您可以选择与正在创建的对象关联的对象，当您只希望获得ID时，Ember可能会自动为您提供对象。例如，使用Ember.Forms.Select视图绑定，此示例中的client_ID值将是实际的客户端对象实例，而不仅仅是ID

如果随后在App.store.find（）调用中盲目使用此对象，您将得到一个从未实现的承诺对象，其ID设置为原始对象的序列化。如果您随后尝试提交此文件，它将尝试保持以下内容：

"field_id":"<App.Type:ember123:1>"

“字段id”：