https://ruby-china.org/lijie_1010 en-us <p>model validates_length_of :content, :maximum =&gt; 400, :message =&gt; "店铺描述小于 200 字"</p> <p>view form_for <a href="/seo" class="user-mention" title="@seo"><i>@</i>seo</a>, :url =&gt; "#{url}",:method =&gt; "post" do |f| error_messages_for :name </p> lijie_1010 Wed, 14 Jan 2015 17:40:58 +0800 https://ruby-china.org/topics/23737 https://ruby-china.org/topics/23737 <p>rails 'paperclip' gem 包如何使用，自己参考 git 上的说明尝试了几次都没成功，有谁使用过，说下步骤，最好有具体的案例代码，谢谢</p> lijie_1010 Mon, 12 Jan 2015 18:46:57 +0800 https://ruby-china.org/topics/23689 https://ruby-china.org/topics/23689