check for AS object in partial hack

app/models/post.rb

@@ -107,5 +107,9 @@ class Post < ActiveRecord::Base
       Rails.logger.info("event=receive payload_type=#{self.class} update=true status=abort sender=#{self.diaspora_handle} reason='update not from post owner' existing_post=#{self.id}")
     end
   end
+
+  def activity_streams?
+    false
+  end
 end
 

app/views/shared/_stream_element.html.haml

@@ -23,7 +23,7 @@
         = person_link(post.author, :class => 'author')
         %time.time.timeago{:datetime => post.created_at, :integer => time_for_sort(post).to_i}
 
-      - if post.respond_to?(:activity_streams?)
+      - if post.activity_streams?
         = image_tag post.image_url
       - else
         = render 'status_messages/status_message', :post => post, :photos => post.photos

app/views/shared/_stream_element.mobile.haml

@@ -9,7 +9,7 @@
     .from
       = person_link(post.author)
 
-    - if post.respond_to?(:activity_streams?)
+    - if post.activity_streams?
       = image_tag post.image_url
     - else
       = render 'status_messages/status_message', :post => post, :photos => post.photos