# File lib/rolify/adapters/active_record/resource_adapter.rb, line 13
      def resources_find(roles_table, relation, role_name)
        klasses   = self.relation_types_for(relation)
        relations = klasses.inject('') do |str, klass|
          str = "#{str}'#{klass.to_s}'"
          str << ', ' unless klass == klasses.last
          str
        end

        resources = relation.joins("INNER JOIN #{quote_table(roles_table)} ON #{quote_table(roles_table)}.resource_type IN (#{relations}) AND
                                    (#{quote_table(roles_table)}.resource_id IS NULL OR #{quote_table(roles_table)}.resource_id = #{quote_table(relation.table_name)}.#{quote_column(relation.primary_key)})")
        resources = resources.where("#{quote_table(roles_table)}.name IN (?) AND #{quote_table(roles_table)}.resource_type IN (?)", Array(role_name), klasses)
        resources = resources.select("#{quote_table(relation.table_name)}.*")
        resources
      end