如何使用RequireJS加载Typeahead/Bloodhound

项目是用 Marionette+RequireJS. 最近要使用TypeaheadJS（0.11.1） 但是始终无法加载Bloodhound。麻烦各位帮忙看看错在哪里？错误信息：“Cannot read property 'tokenizers' of undefined”

paths: {

'jquery'                : 'assets/lib/jquery.min',
'underscore'            : 'assets/lib/underscore-min',         
'backbone'              : 'assets/lib/backbone.min',
'marionette'            : 'assets/lib/backbone.marionette.min',
'bootstrap'             : 'assets/lib/bootstrap.min',
'typeahead'             : 'assets/lib/typeahead.bundle.min',       

},

shim: {

typeahead:{
    deps: ['jquery'],
    exports:'Bloodhound',
    init: function ($) {
        return require.s.contexts._.registry['typeahead.js'].factory( $                          );
    }
}

}

Marionette view code:

define(['jquery', 'marionette','templates', 'underscore','typeahead'],

function $,Marionette, templates, _,Bloodhound) {
          'use strict';
      ..................
    onShow:function(){
       var tours = new Bloodhound({
          datumTokenizer: function (datum) {
              return Bloodhound.tokenizers.whitespace(datum.value);
          },
          queryTokenizer: Bloodhound.tokenizers.whitespace,
          remote: {
              url: '/api/infos?t=ALL',
          }
      });

      // Initialize the Bloodhound suggestion engine
      tours.initialize();
      // Instantiate the Typeahead UI
      $('.typeahead').typeahead(null, {
          displayKey: 'value',
          source: tours.ttAdapter()
      });

},