jlindley (owner)

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gist: 189211 Download_button fork
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multiple_per_attr_only.rb #
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  named_scope :multiple_per_zip, lambda{
    zip_counts = Site.count(
      :all, :group => 'addresses.zip', :joins => :addresses
    )
    multi_site_zip_counts = zip_counts.reject{|k,v| v < 2}
    just_zips = multi_site_zip_counts.map{|pair| pair[0]}.compact
    {:conditions => ['addresses.zip in (?)', just_zips.join(",")]}
  }