将disqus与emberjs集成仅适用于首页加载

Question

我正在运行ember-1.0.0-rc.5并为disqus注释创建了一个视图,我正在传递文章ID.

我的问题是,disqus不知道我何时从一个页面切换到另一个页面.

这是视图代码:

App.DisqusView = Ember.View.extend({
  tagName: 'div',
  elementId: 'disqus_thread',
  didInsertElement: function(){
    var root_url = "http://my-root-url.herokuapp.com"
    var page_id = this.get('identifier');

    /* * * CONFIGURATION VARIABLES: EDIT BEFORE PASTING INTO YOUR WEBPAGE * * */
    var disqus_identifier = "item-" + page_id;
    console.log(disqus_identifier);
     / this outputs the correct id/

    var disqus_title = "the song title" ;
    console.log(disqus_title);
     / this outputs the correct title/

    var disqus_url =  root_url + '/#/song/' + page_id;
    console.log(disqus_url);
     / this outputs the correct url for the page/

    var disqus_shortname = 'example'; 

    /* * * DON'T EDIT BELOW THIS LINE * * */
    (function() {
      var dsq = document.createElement('script'); dsq.type = 'text/javascript'; dsq.async = true;
      dsq.src = 'http://' + disqus_shortname + '.disqus.com/embed.js';
      (document.getElementsByTagName('head')[0] || document.getElementsByTagName('body')[0]).appendChild(dsq);
    })();
  }
});

这是在我的车把模板中:

{{view App.DisqusView identifierBinding="id"}}

因此,评论在所有页面上呈现,但是一条评论仍然存在于所有页面中,就好像disqus认为它们都是同一页面一样.

我正在记录page_id和url以确保我正在为disqus提供正确的url.

当我从一个页面点击另一个页面时都有disqus时,控制台会发出一堆disqus错误:

DISQUS assertion failed: Unsafe attempt to redefine existing module: stringify [VM] embed.js (16737):1
DISQUS assertion failed: Unsafe attempt to redefine existing module: parse [VM] embed.js (16737):1
DISQUS assertion failed: Unsafe attempt to redefine existing module: domready [VM] embed.js (16737):1
DISQUS assertion failed: Unsafe attempt to redefine existing module: on [VM] embed.js (16737):1
DISQUS assertion failed: Unsafe attempt to redefine existing module: once [VM] embed.js (16737):1
DISQUS assertion failed: Unsafe attempt to redefine existing module: off [VM] embed.js (16737):1
DISQUS assertion failed: Unsafe attempt to redefine existing module: trigger [VM] embed.js (16737):1
DISQUS assertion failed: Unsafe attempt to redefine existing module: stopListening [VM] embed.js (16737):1
DISQUS assertion failed: Unsafe attempt to redefine existing module: listenTo [VM] embed.js (16737):1
DISQUS assertion failed: Unsafe attempt to redefine existing module: listenToOnce [VM] embed.js (16737):1
DISQUS assertion failed: Unsafe attempt to redefine existing module: bind [VM] embed.js (16737):1
DISQUS assertion failed: Unsafe attempt to redefine existing module: unbind [VM] embed.js (16737):1
DISQUS assertion failed: Unsafe attempt to redefine existing module: getShortnameFromUrl [VM] embed.js (16737):1
DISQUS assertion failed: Unsafe attempt to redefine existing module: getForum [VM] embed.js (16737):1
DISQUS assertion failed: Unsafe attempt to redefine existing module: isSSL [VM] embed.js (16737):1
DISQUS assertion failed: Unsafe attempt to redefine existing module: guessThreadTitle [VM] embed.js (16737):1
DISQUS assertion failed: Unsafe attempt to redefine existing module: getContrastYIQ [VM] embed.js (16737):1
DISQUS assertion failed: Unsafe attempt to redefine existing module: colorToHex [VM] embed.js (16737):1
DISQUS assertion failed: Unsafe attempt to redefine existing module: getElementStyle [VM] embed.js (16737):1
DISQUS assertion failed: Unsafe attempt to redefine existing module: getAnchorColor [VM] embed.js (16737):1
DISQUS assertion failed: Unsafe attempt to redefine existing module: normalizeFontValue [VM] embed.js (16737):1
DISQUS assertion failed: Unsafe attempt to redefine existing module: isSerif [VM] embed.js (16737):1
DISQUS assertion failed: Unsafe attempt to redefine existing module: getBrowserSupport [VM] embed.js (16737):1
DISQUS assertion failed: Unsafe attempt to redefine existing module: getPermalink [VM] embed.js (16737):1
DISQUS assertion failed: Unsafe attempt to redefine existing module: expose [VM] embed.js (16737):1
DISQUS assertion failed: Unsafe attempt to redefine existing module: BaseApp [VM] embed.js (16737):1
DISQUS assertion failed: Unsafe attempt to redefine existing module: WindowedApp [VM] embed.js (16737):1
DISQUS assertion failed: Unsafe attempt to redefine existing module: ThreadBoundApp [VM] embed.js (16737):1
DISQUS assertion failed: Unsafe attempt to redefine existing module: PublicInterfaceMixin [VM] embed.js (16737):1
DISQUS assertion failed: Unsafe attempt to redefine existing module: Switches [VM] embed.js (16737):1
DISQUS assertion failed: Unsafe attempt to redefine existing module: Profile [VM] embed.js (16737):1
DISQUS assertion failed: Unsafe attempt to redefine existing module: BackplaneIntegration [VM] embed.js (16737):1
DISQUS assertion failed: Unsafe attempt to redefine existing module: Lounge [VM] embed.js (16737):1
DISQUS assertion failed: Unsafe attempt to redefine existing module: Ignition [VM] embed.js (16737):1
DISQUS assertion failed: Unsafe attempt to redefine existing module: HostConfig 

Answer 1

将 Disqus 与 Ember 集成

更新- 这里现在有一个Ember 插件。

我刚刚完成在 ember 博客框架上集成异步 Disqus（请参阅此处的源代码），这就是我的做法：

首先，将选项设置为对象（所有组件都可以轻松访问）：

App.DisqusOptions = Em.Object.create({
  shortname: 'example', // Set this to your Disqus account's shortname
});

接下来，使用他们给您的代码加载一次且仅一次。我在组件中这样做了：

App.DisqusCommentsComponent = Em.Component.extend({
  setupDisqus: function() {
    if (!window.DISQUS) {
      var disqusShortname = App.DisqusOptions.get('shortname');
      window.disqus_shortname = disqusShortname; // Mimic behaviour as if we're setting variable in a script tag

      var dsq = document.createElement('script'); dsq.type = 'text/javascript'; dsq.async = true;
      dsq.src = '//' + disqusShortname + '.disqus.com/embed.js';
      (document.getElementsByTagName('head')[0] || document.getElementsByTagName('body')[0]).appendChild(dsq);
    }
  }.on('didInsertElement'),
});

您还可以通过在运行该方法并检查该方法disqusLoaded后将选项对象上的属性设置为 true 来实现此目的。setupDisqus()

此外，您可以在应用程序模板中使用script标签来执行此操作，但如果您在不包含 and 元素的页面上加载脚本，这会导致id错误#disqus_thread。

接下来，使用您将放置在要显示评论的每个页面上的Em.View或。Em.Component我们就这样称呼它吧App.DisqusCommentsComponent。该组件将没有布局（模板）。由于每次我们更改路线/帖子时都会加载该组件，因此它是调用的完美位置DISQUS.reset()。

App.DisqusCommentsComponent = Em.Component.extend({
  elementId: 'disqus_thread', // ID is used by Disqus to know where to load the comments
  timer: null,

  setupDisqus: function() {
    // setupDisqus() code left out for purposes of not repeating myself
  }.on('didInsertElement'),

  loadNewPostComments: function() {
    if (window.DISQUS) {
      this.reset();
    } else {
      // If DISQUS hasn't finished async loading yet, check again in 100 ms. Once it's loaded, the above this.reset() will be called.
      this.set('timer', Em.run.debounce(this, this.loadNewPostComments, 100));
    }
  },

  reset: function() {
    var controller = this.get('parentView.controller');
    var postIdentifier = controller.get('urlString');
    var postUrl = window.location.href;

    // Since this view has the elementId Disqus targets, we need to wait until after the view has finished rendering to call the reset function, which searches for #disqus_thread
    Em.run.scheduleOnce('afterRender', function() {
      window.DISQUS.reset({
        reload: true,
        config: function () {
          this.page.identifier = postIdentifier;
          this.page.url = postUrl;
        }
      });
    });
  },
});

注意：该变量postIdentifier是在控制器上为每个博客文章设置的属性，作为控制器的模型加载。您将需要一种类似的方式来识别每条路线以跟踪评论。

等等，瞧！每次用户将路由更改为模板中包含评论组件的路由时，都会进行异步调用。例如：

// Some random hbs here for your blog post
{{disqus-comments}}

Disqus JS 配置变量

每当您设置像这样的配置变量时，您都需要在窗口上设置它们的属性。例如：

var disqusShortname = App.DisqusOptions.get('shortname');
window.disqus_shortname = disqusShortname;

// Do stuff with disqusShortname here

旁注：评论数

如果你想使用Disqus的评论计数功能，可以采取与上面类似的方法。但是，您还需要重新打开助手调用的视图，{{link-to}}如下所示：

Em.LinkView.reopen({

  addDisqusTag: function() {
    var commentCount = this.get('commentCount');

    if (commentCount) {
      var isLinkToPost = this.get('isLinkToPost');
      var href = this.get('href');
      var disqusTag = '#disqus_thread';

      this.set('href', href + disqusTag);
    }
  }.on('willInsertElement'),
});

现在，如果您在模板中执行以下操作，它将返回 commentCount：

{{#link-to 'post' this.urlString commentCount='true'}}{{/link-to}}

希望有帮助。如果您有任何疑问，请告诉我！