diff --git a/app/api/mobile/apis/new_comment.rb b/app/api/mobile/apis/new_comment.rb
index d98977661..e72daae6d 100644
--- a/app/api/mobile/apis/new_comment.rb
+++ b/app/api/mobile/apis/new_comment.rb
@@ -189,7 +189,7 @@ module Mobile
                     reply.content = params[:content]
                     reply.parent_id = params[:id]
                     reply.subject = "RE: #{topic.subject}"
-                    if topic.children << reply
+                    if message.children << reply
                       result = 2
                       update_id = topic.id
                     end
diff --git a/app/api/mobile/entities/user.rb b/app/api/mobile/entities/user.rb
index 657b1cb7b..30a2a7edd 100644
--- a/app/api/mobile/entities/user.rb
+++ b/app/api/mobile/entities/user.rb
@@ -30,19 +30,24 @@ module Mobile
                   u.nil? ? "" : u.show_name
                 when :roles_id
                   u[:roles_id].nil? ? nil : u.roles_id
+                when :login
+                  u.login
+                when :lastname
+                  u.lastname
+                when :mail
+                  u.mail
               end
             end
           end
-
         end
       end
 
       expose :id 
       #头像
-      expose :login
-      expose :lastname
+      user_expose :login
+      user_expose :lastname
       #邮箱地址
-      expose :mail
+      user_expose :mail
       expose :nickname
       #真名
       user_expose :img_url