Rubyonrails 骨干model.destroy()即使工作正常也会调用错误回调函数

我有一个Backbone.js模型，当用户点击模型视图中的链接时，我正试图销毁它.视图是这样的(伪代码，因为它是在CoffeeScript中实现的，可以在问题的底部找到).

var window.ListingSaveView = Backbone.View.extend({
  events: {
    'click a.delete': 'onDestroy'
  },

  onDestroy: function(event){
    event.preventDefault();
    this.model.destroy({
      success: function(model, response){
        console.log "Success";
      },
      error: function(model, response){
        console.log "Error";
      }
    });
  }
});

当我在浏览器中单击delete链接时，我总是会将Error记录到控制台，即使我的服务器记录了相关数据库记录的成功销毁并返回200响应.当我刷新页面(导致集合从数据库重新呈现)时，我删除的模型将消失.

有趣的是，当我在错误回调中记录response时，它的状态码200表示成功，但它也报告statusText: "parseerror"，不管这意味着什么.我的服务器日志(log)中没有错误.

我做错了什么？

这是来自服务器的响应:

  Object
    abort: function ( statusText ) {
    always: function () {
    complete: function () {
    done: function () {
    error: function () {
    fail: function () {
    getAllResponseHeaders: function () {
    getResponseHeader: function ( key ) {
    isRejected: function () {
    isResolved: function () {
    overrideMimeType: function ( type ) {
    pipe: function ( fnDone, fnFail ) {
    promise: function ( obj ) {
    readyState: 4
    responseText: " "
    setRequestHeader: function ( name, value ) {
    status: 200
    statusCode: function ( map ) {
    statusText: "parsererror"
    success: function () {
    then: function ( doneCallbacks, failCallbacks ) {
    __proto__: Object

下面是destroy与(Ruby on Rails)交互的服务器操作

  # DELETE /team/listing_saves/1.json
  def destroy
    @save = current_user.team.listing_saves.find(params[:id])
    @save.destroy
    respond_to do |format|
      format.json { head :ok }
    end
  end

下面是主干视图的实际CoffeeScript实现，供喜欢它的人使用:

class MoveOutOrg.Views.ListingSaveView extends Backbone.View
  tagName: 'li'
  className: 'listing_save'
  template: JST['backbone/templates/listing_save']
  events:
    'click a.delete_saved': 'onDestroy'

  initialize: ->
    @model.bind 'change', this.render
  render: =>
    renderedContent = @template(@model.toJSON())
    $(@el).html(renderedContent)
    this
  onDestroy: (event) ->
    event.preventDefault() # stop the hash being added to the URL
    console.log "Listing Destroyed"
    @model.destroy
      success: (model, response)->
        console.log "Success"
        console.log model
        console.log response

      error: (model, response) ->
        console.log "Error"
        console.log model # this is the ListingSave model
        console.log response