reset_counters

# File activerecord/lib/active_record/counter_cache.rb, line 20
      def reset_counters(id, *counters)
        object = find(id)
        counters.each do |counter_association|
          has_many_association = _reflect_on_association(counter_association)
          unless has_many_association
            has_many = reflect_on_all_associations(:has_many)
            has_many_association = has_many.find { |association| association.counter_cache_column && association.counter_cache_column.to_sym == counter_association.to_sym }
            counter_association = has_many_association.plural_name if has_many_association
          end
          raise ArgumentError, "'#{self.name}' has no association called '#{counter_association}'" unless has_many_association

          if has_many_association.is_a? ActiveRecord::Reflection::ThroughReflection
            has_many_association = has_many_association.through_reflection
          end

          foreign_key  = has_many_association.foreign_key.to_s
          child_class  = has_many_association.klass
          reflection   = child_class._reflections.values.find { |e| e.belongs_to? && e.foreign_key.to_s == foreign_key && e.options[:counter_cache].present? }
          counter_name = reflection.counter_cache_column

          stmt = unscoped.where(arel_table[primary_key].eq(object.id)).arel.compile_update({
            arel_table[counter_name] => object.send(counter_association).count(:all)
          }, primary_key)
          connection.update stmt
        end
        return true
      end