Disclaimer: My original exposure to Ruby on Rails was literally years ago, and a great many things are new to me now that I'm picking it back up. One of these things is named scopes. They seem great, but I'm not getting the result I expect. Here's a for-instance:Disclaimer: My original exposure to Ruby on Rai
阅读背景：
如果我使用：join，则named_scope正在创建新对象
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