Fixes to {{#groupedEach}}

app/assets/javascripts/discourse/helpers/grouped_each.js

@@ -10,6 +10,7 @@ var DiscourseGroupedEach = function(context, path, options) {
   this.normalizedRoot = normalized.root;
   this.normalizedPath = normalized.path;
   this.content = this.lookupContent();
+  this.destroyed = false;
 
   this.addContentObservers();
   this.addArrayObservers();
@@ -41,6 +42,8 @@ DiscourseGroupedEach.prototype = {
   },
 
   addArrayObservers: function() {
+    if (!this.content) { return; }
+
     this.content.addArrayObserver(this, {
       willChange: 'contentArrayWillChange',
       didChange: 'contentArrayDidChange'
@@ -48,6 +51,8 @@ DiscourseGroupedEach.prototype = {
   },
 
   removeArrayObservers: function() {
+    if (!this.content) { return; }
+
     this.content.removeArrayObserver(this, {
       willChange: 'contentArrayWillChange',
       didChange: 'contentArrayDidChange'
@@ -65,6 +70,8 @@ DiscourseGroupedEach.prototype = {
   },
 
   render: function() {
+    if (!this.content) { return; }
+
     var content = this.content,
         contentLength = Em.get(content, 'length'),
         data = this.options.data,
@@ -72,18 +79,28 @@ DiscourseGroupedEach.prototype = {
 
     data.insideEach = true;
     data.insideGroup = true;
+
     for (var i = 0; i < contentLength; i++) {
       template(content.objectAt(i), { data: data });
     }
   },
 
   rerenderContainingView: function() {
-    Ember.run.scheduleOnce('render', this.containingView, 'rerender');
+    var self = this;
+    Ember.run.scheduleOnce('render', this, function() {
+      // It's possible it's been destroyed after we enqueued a re-render call.
+      if (!self.destroyed) {
+        self.containingView.rerender();
+      }
+    });
   },
 
   destroy: function() {
     this.removeContentObservers();
-    this.removeArrayObservers();
+    if (this.content) {
+      this.removeArrayObservers();
+    }
+    this.destroyed = true;
   }
 };
 

app/assets/javascripts/discourse/templates/topic_summary/info.js.handlebars

@@ -10,7 +10,6 @@
   {{/if}}
 </nav>
 
-
 {{#if summaryCollapsed}}
   <section class='summary collapsed'>
     <ul class="clearfix">
@@ -42,7 +41,7 @@
       </li>
       {{#if details.fewParticipants}}
       <li class='avatars'>
-        {{#each details.fewParticipants}}{{participant participant=this}}{{/each}}
+        {{#groupedEach details.fewParticipants}}{{participant participant=this}}{{/groupedEach}}
       </li>
       {{/if}}
     </ul>
@@ -74,20 +73,22 @@
 
   {{#if details.participants}}
     <section class='avatars clearfix'>
-      {{#each details.participants}}{{participant participant=this}}{{/each}}
+      {{#groupedEach details.participants}}{{participant participant=this}}{{/groupedEach}}
     </section>
   {{/if}}
 
   {{#if view.parentView.infoLinks}}
     <section class='links'>
         <ul class='topic-links'>
-          {{#collection contentBinding="view.parentView.infoLinks" itemTagName="li"}}
-            <span class='badge badge-notification clicks' title='{{i18n topic_summary.clicks}}'>{{clicks}}</span>
-            <a href="{{unbound url}}" target="_blank" class='topic-link track-link' data-user-id="{{unbound user_id}}" data-ignore-post-id="true" title="{{unbound url}}">
-              {{#if title}}{{shorten title}}{{else}}{{shortenUrl url}}{{/if}}
-              {{#if internal}}<i class='icon-arrow-right' title='{{i18n topic_summary.topic_link}}'></i>{{/if}}
-            </a>
-          {{/collection}}
+          {{#groupedEach view.parentView.infoLinks}}
+            <li>
+              <span class='badge badge-notification clicks' title='{{i18n topic_summary.clicks}}'>{{clicks}}</span>
+              <a href="{{unbound url}}" target="_blank" class='topic-link track-link' data-user-id="{{unbound user_id}}" data-ignore-post-id="true" title="{{unbound url}}">
+                {{#if title}}{{shorten title}}{{else}}{{shortenUrl url}}{{/if}}
+                {{#if internal}}<i class='icon-arrow-right' title='{{i18n topic_summary.topic_link}}'></i>{{/if}}
+              </a>
+            </li>
+          {{/groupedEach}}
         </ul>
 
         {{#if view.parentView.showAllLinksControls}}

app/assets/javascripts/discourse/templates/topic_summary/private_message.js.handlebars

@@ -1,11 +1,11 @@
 <h3><i class='icon icon-envelope'></i> {{i18n private_message_info.title}}</h3>
 <div class='participants clearfix'>
-  {{#each details.allowed_groups}}
+  {{#groupedEach details.allowed_groups}}
   <div class='user group'>
     #{{unbound name}}
   </div>
-  {{/each}}
-  {{#each details.allowed_users}}
+  {{/groupedEach}}
+  {{#groupedEach details.allowed_users}}
   <div class='user'>
     <a href='/users/{{lower username}}'>
       {{avatar this imageSize="small"}}
@@ -17,7 +17,7 @@
     <a class='remove-invited' {{action removeAllowedUser username}}><i class="icon-remove"></i></a>
     {{/if}}
   </div>
-  {{/each}}
+  {{/groupedEach}}
 </div>
 {{#if details.can_invite_to}}
   <div class='controls'>

app/assets/javascripts/discourse/templates/user/stream.js.handlebars

@@ -0,0 +1,23 @@
+{{#groupedEach model.content}}
+  <div {{bindAttr class=":item hidden deleted moderator_action"}}>
+    <div class='clearfix info'>
+      <a href="{{unbound userUrl}}" class='avatar-link'><div class='avatar-wrapper'>{{avatar this imageSize="large" extraClasses="actor" ignoreTitle="true"}}</div></a>
+      <span class='time'>{{date path="created_at" leaveAgo="true"}}</span>
+      <span class="title">
+        <a href="{{unbound postUrl}}">{{unbound title}}</a>
+      </span>
+      <span class="type">{{unbound descriptionHtml}}</span>
+    </div>
+    <p class='excerpt'>
+    {{{unbound excerpt}}}
+    </p>
+    {{#groupedEach children}}
+      <div class='child-actions'>
+        <i class="icon {{unbound icon}}"></i>
+      {{#groupedEach items}}
+        <a href="{{unbound userUrl}}" class='avatar-link'><div class='avatar-wrapper'>{{avatar this imageSize="tiny" extraClasses="actor" ignoreTitle="true"}}</div></a>
+      {{/groupedEach}}
+      </div>
+    {{/groupedEach}}
+  </div>
+{{/groupedEach}}

app/assets/javascripts/discourse/templates/user/stream_item.js.handlebars

@@ -1,21 +0,0 @@
-<div {{bindAttr class=":item hidden deleted moderator_action"}}>
-  <div class='clearfix info'>
-    <a href="{{unbound userUrl}}" class='avatar-link'><div class='avatar-wrapper'>{{avatar this imageSize="large" extraClasses="actor" ignoreTitle="true"}}</div></a>
-    <span class='time'>{{date path="created_at" leaveAgo="true"}}</span>
-    <span class="title">
-      <a href="{{unbound postUrl}}">{{unbound title}}</a>
-    </span>
-    <span class="type">{{unbound descriptionHtml}}</span>
-  </div>
-  <p class='excerpt'>
-  {{{unbound excerpt}}}
-  </p>
-  {{#each children}}
-    <div class='child-actions'>
-      <i class="icon {{unbound icon}}"></i>
-    {{#each items}}
-    <a href="{{unbound userUrl}}" class='avatar-link'><div class='avatar-wrapper'>{{avatar this imageSize="tiny" extraClasses="actor" ignoreTitle="true"}}</div></a>
-    {{/each}}
-    </div>
-  {{/each}}
-</div>

app/assets/javascripts/discourse/views/replies_view.js

@@ -12,7 +12,7 @@ Discourse.RepliesView = Ember.CollectionView.extend({
   classNames: ['replies-list', 'embedded-posts', 'bottom'],
   itemViewClass: Discourse.EmbeddedPostView,
 
-  repliesShown: (function() {
+  repliesShownChanged: function() {
     var $this = this.$();
     if (this.get('parentView.repliesShown')) {
       Em.run.schedule('afterRender', function() {
@@ -23,7 +23,7 @@ Discourse.RepliesView = Ember.CollectionView.extend({
         $this.slideUp();
       });
     }
-  }).observes('parentView.repliesShown')
+  }.observes('parentView.repliesShown')
 
 });
 

app/assets/javascripts/discourse/views/topic_summary/topic_summary_view.js

@@ -41,9 +41,8 @@ Discourse.TopicSummaryView = Discourse.ContainerView.extend({
 
     this.attachViewWithArgs({
       templateName: 'topic_summary/info',
-      topic: this.get('topic'),
-      summaryView: this
-    });
+      content: this.get('controller')
+    }, Discourse.GroupedView);
 
     this.trigger('appendSummaryInformation', this);
   },
@@ -59,8 +58,9 @@ Discourse.TopicSummaryView = Discourse.ContainerView.extend({
       container.attachViewWithArgs({
         templateName: 'topic_summary/best_of_toggle',
         tagName: 'section',
-        classNames: ['information']
-      });
+        classNames: ['information'],
+        content: this.get('controller')
+      }, Discourse.GroupedView);
     }
 
     // If we have a private message
@@ -68,8 +68,9 @@ Discourse.TopicSummaryView = Discourse.ContainerView.extend({
       container.attachViewWithArgs({
         templateName: 'topic_summary/private_message',
         tagName: 'section',
-        classNames: ['information']
-      });
+        classNames: ['information'],
+        content: this.get('controller')
+      }, Discourse.GroupedView);
     }
   }
 });

app/assets/javascripts/discourse/views/user/user_stream_view.js

@@ -7,14 +7,11 @@
   @uses Discourse.LoadMore
   @module Discourse
 **/
-Discourse.UserStreamView = Ember.CollectionView.extend(Discourse.LoadMore, {
+Discourse.UserStreamView = Discourse.View.extend(Discourse.LoadMore, {
   loading: false,
-  content: Em.computed.alias('controller.model.content'),
   eyelineSelector: '#user-activity .user-stream .item',
   classNames: ['user-stream'],
 
-  itemViewClass: Discourse.GroupedView.extend({ templateName: 'user/stream_item' }),
-
   loadMore: function() {
     var userStreamView = this;
     if (userStreamView.get('loading')) { return; }
@@ -26,6 +23,3 @@ Discourse.UserStreamView = Ember.CollectionView.extend(Discourse.LoadMore, {
     });
   }
 });
-
-
-Discourse.View.registerHelper('userStream', Discourse.UserStreamView);