https://ruby-china.org/Hobo en-us <p>表关联能定义主键不，比如我想通过 tmp 表的一个 a_id 做自连接</p> <p>tmp table id a_id ……</p> <p>这样该怎么实现</p> <p>可能类似这样的！！！ class tmp &lt; ActiveRecord::Base has_many :tmps, :class_name =&gt; "tmp", :foreign_key =&gt; "a_id", :primary_key =&gt; "a_id" end</p> Hobo Mon, 27 May 2013 19:37:17 +0800 https://ruby-china.org/topics/11269 https://ruby-china.org/topics/11269