fix the aspect stream

app/helpers/interim_stream_hackiness_helper.rb

@@ -21,10 +21,10 @@ module InterimStreamHackinessHelper
   end
 
   def from_group(post)
-    if params[:controller]== 'soups'
+    if defined?(@stream) && params[:controller]== 'soups'
       @stream.post_from_group(post)
     else
-      nil
+     [] 
     end
   end
 

lib/stream/base.rb

@@ -30,7 +30,7 @@ class Stream::Base
   end
 
   def post_from_group(post)
-    nil
+    []
   end
 
   # @return [String]