Show an excerpt of a pinned topic's body in the topic list

app/assets/javascripts/discourse/models/topic.js

@@ -368,7 +368,12 @@ Discourse.Topic = Discourse.Model.extend({
     // If the post directly below's reply_to_post_number is our post number, it's
     // considered directly below.
     return (postBelow ? postBelow.get('reply_to_post_number') : void 0) === post.get('post_number');
-  }
+  },
+
+  excerptTruncated: function() {
+    var e = this.get('excerpt');
+    return( e && e.substr(e.length - 8,8) == '…' );
+  }.property('excerpt')
 });
 
 Discourse.Topic.reopenClass({

app/assets/javascripts/discourse/templates/list/topic_list_item.js.handlebars

@@ -28,6 +28,15 @@
     {{#if unseen}}
       <a href="{{lastReadUrl}}" class='badge new-posts badge-notification' title='{{i18n topic.new}}'><i class='icon icon-asterisk'></i></a>
     {{/if}}
+
+    {{#if excerpt}}
+      <div class="topic-excerpt">
+        {{excerpt}}
+        {{#if excerptTruncated}}
+          <a href="{{lastReadUrl}}">{{i18n read_more}}</a>
+        {{/if}}
+      </div>
+    {{/if}}
   </td>
 
   <td class='category'>

app/assets/stylesheets/application/topic-list.css.scss

@@ -105,6 +105,12 @@
     }
   }
 
+  .topic-excerpt {
+    font-size: 14px;
+    margin-top: 8px;
+    color: $dark_gray;
+  }
+
   .rank-details {
     background-color: #eee;
     padding: 6px;

app/serializers/topic_list_item_serializer.rb

@@ -11,7 +11,8 @@ class TopicListItemSerializer < ListableTopicSerializer
              :starred,
              :has_best_of,
              :archetype,
-             :rank_details
+             :rank_details,
+             :excerpt
 
   has_one :category
   has_many :posters, serializer: TopicPosterSerializer, embed: :objects
@@ -54,5 +55,12 @@ class TopicListItemSerializer < ListableTopicSerializer
     PinnedCheck.new(object, object.user_data).pinned?
   end
 
+  def include_excerpt?
+    pinned
+  end
+
+  def excerpt
+    object.posts.first.try(:excerpt,200) || nil
+  end
 
 end

config/locales/client.en.yml

@@ -30,6 +30,7 @@ en:
     you: "You"
     or: "or"
     now: "just now"
+    read_more: 'read more'
 
     suggested_topics:
       title: "Suggested Topics"