https://ruby-china.org/jypandjip en-us <p>有同学对 rails2 的源代码感兴趣吗？前段时间我研究了一下<code>ActiveRecord</code>里的<code>named_scope</code>,感觉真的是可以学到很多东西和技巧，相信研究过的同学对会它的实现拍手叫绝，真的是把 ruby 的特性发挥到了极致，在这里我贴出两个 github 链接，感兴趣的同学快去研究研究吧，我个人觉得能读懂这段代码并且在自己的项目中灵活运用，你的编码水平会提高一大截。</p> <p><a href="https://github.com/rails/rails/blob/2-3-stable/activerecord/lib/active_record/named_scope.rb" rel="nofollow" target="_blank">https://github.com/rails/rails/blob/2-3-stable/activerecord/lib/active_record/named_scope.rb</a> <a href="https://github.com/rails/rails/blob/2-3-stable/activerecord/lib/active_record/base.rb#L2132L2190" rel="nofollow" target="_blank">https://github.com/rails/rails/blob/2-3-stable/activerecord/lib/active_record/base.rb#L2132L2190</a></p> <p>祝你好运！</p> jypandjip Mon, 04 Aug 2014 21:28:10 +0800 https://ruby-china.org/topics/20839 https://ruby-china.org/topics/20839