remove_duplicate_results!

# File activerecord/lib/active_record/associations/join_dependency.rb, line 61
      def remove_duplicate_results!(base, records, associations)
        case associations
        when Symbol, String
          reflection = base.reflections[associations]
          remove_uniq_by_reflection(reflection, records)
        when Array
          associations.each do |association|
            remove_duplicate_results!(base, records, association)
          end
        when Hash
          associations.keys.each do |name|
            reflection = base.reflections[name]
            remove_uniq_by_reflection(reflection, records)

            parent_records = []
            records.each do |record|
              if descendant = record.send(reflection.name)
                if reflection.collection?
                  parent_records.concat descendant.target.uniq
                else
                  parent_records << descendant
                end
              end
            end

            remove_duplicate_results!(reflection.klass, parent_records, associations[name]) unless parent_records.empty?
          end
        end
      end