sql - 将 SQL 语句翻译成 named_scope？

Question

如何将此 SQL 转换为 named_scope？另外，我希望总评论参数通过 lambda 传递。

“选择用户。，计数（）作为来自用户的total_comments，其中（users.id = comments.user_id）和（comments.public_comment = 1）和（comments.aasm_state ='posted'）和（comments.forum_user_id为空）的评论按 users.id 分组，total_comments > 25"

Answer 1

named_scope :comments_count_gt, lambda { |count|
  { :select => "users., count() as total_comments",
    :joins => :comments,
    :conditions => { :comments => { :public_comment => 1, :aasm_state => 'posted' } },
    :group => "users.id",
    :having => "total_comments > #{count.to_i}"
  }
}