delete_records

# File activerecord/lib/active_record/associations/has_and_belongs_to_many_association.rb, line 41
        def delete_records(records, method)
          if sql = options[:delete_sql]
            records = load_target if records == :all
            records.each { |record| owner.class.connection.delete(interpolate(sql, record)) }
          else
            relation  = join_table
            condition = relation[reflection.foreign_key].eq(owner.id)

            unless records == :all
              condition = condition.and(
                relation[reflection.association_foreign_key]
                  .in(records.map { |x| x.id }.compact)
              )
            end

            owner.class.connection.delete(relation.where(condition).compile_delete)
          end
        end