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![](/icons/34328de.gif)
![](/icons/34328dou2.gif)
![](/icons/34328dou.gif)
![](/icons/34328dou.gif)
![](/icons/34328dou.gif)
![](/icons/34328de.gif)
![](/icons/34328dou.gif)
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![](/icons/34328dou.gif)
Post < ActiveRecord::Base
belongs_to :author
has_many :comments, :order => 'created_on DESC'
end
如果我们遍历所有
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![](/icons/34328dou.gif)
![](/icons/34328dou.gif)
![](/icons/34328yi.gif)
![](/icons/34328de.gif)
![](/icons/34328dou.gif)
![](/icons/34328yi.gif)
![](/icons/34328dou.gif)
![](/icons/34328dou2.gif)
for post in Post.find(:all)
puts "Post: #{post.title}"
puts "Written by: #{post.author.name}"
puts "Last comment _disibledevent=> [:author, :comment])
# ...
end
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