Backbone.Paginator:无法读取属性'requestPager'

时间:2014-04-09 23:20:58

标签: backbone.js pagination backbone.paginator

question 21560374类似。

我正在尝试实现Backbone.Paginator版本0.8并且在页面加载时我遇到了错误:Uncaught TypeError:无法读取未定义的属性'requestPager'。

首先我提到了CDNJS文件,然后我下载了原始代码并将其放在app / assets / javascripts中。我还在application.js'// = require backbone.paginator.min.js'中要求它。

以下是我在application.html.erb中的部分代码:

<head>
  <title>D2jive</title>
  <link href='http://fonts.googleapis.com/css?family=Audiowide' rel='stylesheet' type='text/css'>
  <link href="//netdna.bootstrapcdn.com/font-awesome/4.0.3/css/font-awesome.css" rel="stylesheet">
  <%= stylesheet_link_tag    "application", media: "all" %>
  <%= javascript_include_tag "application" %>
  <script type="text/javascript" src="assets/backbone.paginator.min.js"></script>
  <%= csrf_meta_tags %>
</head>

在窗口中我实例化我的路由器:

window.D2Jive = {
  Views: {},
  Routers: {},
  Events: {},
  Models: {},
  Collections: {},

  initialize: function() {
    D2Jive.router = new this.Router();
    Backbone.history.start({pushState: true});
  },

};

位于我的路由器中,我指的是我的PaginatedCollection:

this.collection = new D2Jive.Collections.PaginatedCollections( [], { location: location });

然后出现Backbone.Paginator.requestPager的实际代码,弹出错误。

D2Jive.Collections.PaginatedCollection = Backbone.Paginator.requestPager.extend({
 initialize: function(attributes, options){
    this.city = options.location;
  },

我仍然习惯使用JavaScript,但似乎在window initialize函数创建新路由器并检查我创建的Backbone.Paginator集合后,Backbone.Paginator代码正在加载。我只是不确定如何避免这种情况。

弹出错误后,在控制台中我可以加载Backbone.Paginator.requestPager。

Backbone.Paginator.requestPager.extend
function (protoProps, staticProps) {
    var parent = this;
    var child;

    // The constructor function for the new subclass is either defined by you
    // (the "constructor" property in your `extend` definition), or defaulted
    // by us to simply call the parent's constructor.
    if (protoProps && _.has(protoProps, 'constructor')) {
      child = protoProps.constructor;
    } else {
      child = function(){ return parent.apply(this, arguments); };
    }

    // Add static properties to the constructor function, if supplied.
    _.extend(child, parent, staticProps);

    // Set the prototype chain to inherit from `parent`, without calling
    // `parent`'s constructor function.
    var Surrogate = function(){ this.constructor = child; };
    Surrogate.prototype = parent.prototype;
    child.prototype = new Surrogate;

    // Add prototype properties (instance properties) to the subclass,
    // if supplied.
    if (protoProps) _.extend(child.prototype, protoProps);

    // Set a convenience property in case the parent's prototype is needed
    // later.
    child.__super__ = parent.prototype;

    return child;
  } 

任何帮助将不胜感激!

1 个答案:

答案 0 :(得分:0)

确保在启动应用之前包含骨干分页器库。弹出错误后可以访问requestPager的原因可能是因为在该阶段已经加载了lib。

要确保这不是您的代码的问题,请尝试在主页<head>部分中包含主干分页器代码。

根据评论进行编辑:

您需要更改“app / assets / javascripts / application.js”,以便按正确顺序包含文件。类似的东西:

//= require jquery
//= require jquery_ujs
//= require underscore
//= require backbone
//= require bacbkone.paginator.min
//= require_tree .

如果您只是依靠require_tree来包含这些文件,那么它们不一定会包含在正确的顺序中,这正是您所遇到的。

此外,由于Backbone paginator包含在应用程序文件中,因此它应该不再存在。