Fall back to author if the diaspora_handle isn't set, that column just needs to be removed

app/models/post.rb

@@ -29,6 +29,9 @@ class Post < ActiveRecord::Base
   cattr_reader :per_page
   @@per_page = 10
 
+  def diaspora_handle
+    read_attribute(:diaspora_handle) || self.author.diaspora_handle
+  end
   def user_refs
     if AspectVisibility.exists?(:post_id => self.id)
       self.post_visibilities.count + 1

spec/models/activity_streams/photo_spec.rb

@@ -27,10 +27,16 @@ JSON
   end
 
   describe 'serialization' do
+    before do
+      @photo = Factory(:activity_streams_photo)
+      xml = @photo.to_diaspora_xml.to_s
+      @marshalled = Diaspora::Parser.from_xml(xml)
+    end
     it 'Diaspora::Parser should pick the right class' do
-      photo = Factory(:activity_streams_photo)
+      @marshalled.class.should == ActivityStreams::Photo
-      xml = photo.to_diaspora_xml.to_s
+    end
-      Diaspora::Parser.from_xml(xml).class.should == ActivityStreams::Photo
+    it 'marshals the author' do
+      @marshalled.author.should == @photo.author
     end
   end
 end