bug#2878:公共贴吧：编辑帖子、编辑回帖的时候建议不要显示主题

app/controllers/memos_controller.rb

@@ -157,7 +157,7 @@ class MemosController < ApplicationController
 
   def update
     respond_to do |format|
-      if( @memo.update_column(:subject, params[:memo][:subject]) && 
+      if( #@memo.update_column(:subject, params[:memo][:subject]) &&
            @memo.update_column(:content, params[:memo][:content]) &&
            @memo.update_column(:sticky, params[:memo][:sticky]) &&
            @memo.update_column(:lock, params[:memo][:lock])) 

app/views/memos/edit.html.erb

@@ -21,9 +21,9 @@
   <div class="actions">
     <p>
       <% if @memo.parent.nil? && @memo.children.first.nil? %>
-         <%= f.text_field :subject, :required => true, :size => 96 ,:readonly => false,  :maxlength => 50%>
+         <%#= f.text_field :subject, :required => true, :size => 96 ,:readonly => false,  :maxlength => 50%>
       <% else %>
-          <%= f.text_field :subject, :required => true, :size => 96 ,:readonly => true, :style => "border: 1px solid gray", :maxlength => 50%>
+          <%#= f.text_field :subject, :required => true, :size => 96 ,:readonly => true, :style => "border: 1px solid gray", :maxlength => 50%>
       <% end %>
       </p>
     <% if User.current.admin?%>