贝特虫子的专栏

查询某一记录的某一个值：code = Public::Group.find(:all, :conditions => ['id=?',group_id])[0].code查询记录：scores = Public::Score.find(:all, :conditions=>['id=?',field_id_v])v1=0;v2=0;#获取记录中的值for item ...

更新符合条件的记录：result = true; begin Public::Score.update_all("checked=true","group_id=#{group_id} and teacher_id=#{teacher_id}" );rescue ＃ 异常 result = falseend更新某一记录某一字...

       添加一条新记录：    area_room = Public::Room.new        area_room.id = Public::Room.get_valid_id()  ＃ 获取新的id     area_room.title = "XXX"        area_room.num = 50         rsp = area_room.sa...

删除主键为100的记录： rsp = true    id ＝ 100     begin       Public::Room.destroy(id)    rescue      rsp = false    end