oops

app/models/post_action.rb

@@ -78,7 +78,7 @@ class PostAction < ActiveRecord::Base
       if message
         [:notify_moderators, :notify_user].each do |k|
           if post_action_type_id == PostActionType.types[k]
-            target_usernames = target_moderators(user)         
+            target_usernames = k == :notify_moderators ? target_moderators(user) : post.user.username        
             title = I18n.t("post_action_types.#{k}.email_title", 
                             title: post.topic.title) 
             body = I18n.t("post_action_types.#{k}.email_body", 

spec/models/post_action_spec.rb

@@ -20,6 +20,15 @@ describe PostAction do
       PostCreator.any_instance.expects(:create).returns(nil) 
       PostAction.act(build(:user), build(:post), PostActionType.types[:notify_moderators], "this is my special message");
     end
+    
+    it "sends an email to user if selected" do 
+      PostAction.stubs(:create)
+      PostAction.expects(:target_moderators).returns("bob")
+      PostCreator.any_instance.expects(:create).returns(nil) 
+      post = build(:post)
+      post.user = build(:user)
+      PostAction.act(build(:user), build(:post), PostActionType.types[:notify_user], "this is my special message");
+    end
   end
 
   describe "flag counts" do