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named_scope with joins

/ Published in: Rails
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  1. class Post < ActiveRecord::Base
  2.   has_many :comments
  3.   named_scope :commented_by, lambda { |user_id| { :joins => :comments, :conditions => ["comments.user_id = ?", user_id] } }
  4. end
  5.  
  6. class Comment < ActiveRecord::Base
  7.   belongs_to :user
  8.   belongs_to :post
  9. end

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