A bit cleaner way of selecting map pairs, bunch of other cleanup crap generally characterized as removing generated Rails code

rails/map-mash/app/models/map.rb

@@ -2,42 +2,22 @@ require 'fastercsv'
 
 
 class Map < ActiveRecord::Base
+  named_scope :lowest_scoring, :conditions => [
+      %{`maps`.`points` = (
+          SELECT `points` FROM `maps`
+          ORDER BY `points` ASC
+          LIMIT 1
+      )}]
+
   def self.from_city_name(city_name)
     self.find_or_initialize_by_name(city_name).save!
   end
 
   def self.pair
     if Mash.count == 0
-      self.all(:order => 'RANDOM()', :limit => count)
+      self.all(:order => 'RANDOM()', :limit => 2)
     else
-      first_conditions = <<-SQL
-      NOT EXISTS (
-          SELECT * FROM `mashes`
-          WHERE `winner` = `maps`.`id`
-      )
-      SQL
-      second_conditions = <<-SQL
-      `maps`.`id` != :first_id
-          AND (
-              SELECT COUNT(*) FROM `mashes`
-              WHERE `winner` = :first_id
-          ) = (
-              SELECT COUNT(*) FROM `mashes`
-              WHERE `winner` = `maps`.`id`
-          )
-      SQL
-
-      first = self.all(
-          :order => 'RANDOM()',
-          :limit => 1,
-          :conditions => [first_conditions]
-      ).first
-      second = self.all(
-          :order => 'RANDOM()',
-          :limit => 1,
-          :conditions => [second_conditions, {:first_id => first.id}]
-      ).first
-      [first, second]
+      self.lowest_scoring.all(:order => 'RANDOM()', :limit => 2)
     end
   end
 
@@ -54,23 +34,7 @@ class Map < ActiveRecord::Base
     end
   end
 
-  def >(other)
-    self.points > other.points
-  end
-
-  def <(other)
-    self.points < other.points
-  end
-
-  def ==(other)
-    self.points == other.points
-  end
-
   def rounds
     Mash.count(:conditions => ['map_a = :id OR map_b = :id', {:id => self.id}])
   end
-
-  def points
-    Mash.count(:conditions => ['winner = ?', self.id])
-  end
 end