form表单属性多选一并实现提交多条数据

<%form_for (@checkin) do|f|%>
<%=f.hidden_field :event_id, :value =>@event.id%>
<%=f.hidden_field :student_class_id, :value =>@student_class.id%>
<%=f.hidden_field :course_id, :value =>@course.id%>
 <table style="border:solid 1px;border-color:#FFE66F">
	<tr class="even"><td><b>学生名称</b></td><td><b>迟到</b></td><td><b>早退</b></td><td><b>旷课</b></td><td><b>跨班上</b></td></tr>
	<%if @team&&@team!=""%>
	<!--<%=f.hidden_field :team_id, :value => @team.id%>-->
	<%for team in @teams%>
	<%if team.stu_reg_infs.size>0%>
	<%sameevent=Event.find(:last,:conditions=>"team_id=#{team.id} and course_order=#{@event.course_order}")%>
	<tr class="even"><td colspan="1"><font color="#FF0000"><%=team.name%></font></td><td colspan="4"><font color="#FF0000"><%=sameevent.starttime.strftime("%Y年%m月%d日%H时")%></font></td></tr>	
	<%end%>
	 <%for stu_reg_inf in team.stu_reg_infs%>
	<tr class="even"><td><%=stu_reg_inf.name%></td><td><div><div style="float:left;"><input id="checkin_late_stu_reg_inf_<%=stu_reg_inf.id%>_" name="checkin[late_stu_reg_inf_<%=stu_reg_inf.id%>][]" type="checkbox" value="<%=stu_reg_inf.id%>" onclick="buttonDisable('<%=stu_reg_inf.id%>')"/>迟到</div><div id="latediv<%=stu_reg_inf.id%>" name="latediv<%=stu_reg_inf.id%>" style="display:none;"><input name="late<%=stu_reg_inf.id%>" type="text" class="late" id="late<%=stu_reg_inf.id%>"  style="width:20px;"/>分钟</div></div></td>
	<td><div><div style="float:left;"><input id="checkin_leaver_stu_reg_inf_<%=stu_reg_inf.id%>_" name="checkin[leaver_stu_reg_inf_<%=stu_reg_inf.id%>][]" type="checkbox" value="<%=stu_reg_inf.id%>" onclick="leaverbuttonDisable('<%=stu_reg_inf.id%>')"/>早退</div><div id="leaverdiv<%=stu_reg_inf.id%>" name="leaverdiv<%=stu_reg_inf.id%>" style="display:none;"><input name="leaver<%=stu_reg_inf.id%>" type="text" class="leaver" id="leaver<%=stu_reg_inf.id%>" style="width:20px;"/>分钟</div></div></td>	
	<td><div><div style="float:left;"><input id="checkin_truant_stu_reg_inf_<%=stu_reg_inf.id%>_" name="checkin[truant_stu_reg_inf_<%=stu_reg_inf.id%>][]" type="checkbox" value="<%=stu_reg_inf.id%>" onclick="truantbuttonDisable('<%=stu_reg_inf.id%>')"/>旷课</div><div id="truantdiv<%=stu_reg_inf.id%>" name="truantdiv<%=stu_reg_inf.id%>" style="display:none;"><input name="truant<%=stu_reg_inf.id%>" type="text" class="truant" id="truant<%=stu_reg_inf.id%>"  style="width:20px;"/>记录</div></div></td>
	<td><div><div style="float:left;"><input id="checkin_kuaban_stu_reg_inf_<%=stu_reg_inf.id%>_" name="checkin[kuaban_stu_reg_inf_<%=stu_reg_inf.id%>][]" type="checkbox" value="<%=stu_reg_inf.id%>" onclick="kuabanbuttonDisable('<%=stu_reg_inf.id%>')"/>跨班</div><div id="kuabandiv<%=stu_reg_inf.id%>" name="kuabandiv<%=stu_reg_inf.id%>" style="display:none;"><input name="kuaban<%=stu_reg_inf.id%>" type="text" class="kuaban" id="kuaban<%=stu_reg_inf.id%>"  style="width:20px;"/>记录</div></div></td>
	</tr>
	<%end%>
	<%end%>




courses_stu_reg_infs=CoursesStuRegInf.find(:all,:conditions=>"student_class_id=#{params[:checkin][:student_class_id]} and course_id=#{params[:checkin][:course_id]} and (situation='已选' or situation='通过' or situation='不过')")
    stu_reg_infs=[]
    for courses_stu_reg_inf in courses_stu_reg_infs
    stu_reg_infs<<courses_stu_reg_inf.stu_reg_inf
    end
 
  for stu_reg_inf in stu_reg_infs
    if params["checkin"]["late_stu_reg_inf_#{stu_reg_inf.id}"] || params["checkin"]["leaver_stu_reg_inf_#{stu_reg_inf.id}"] || params["checkin"]["truant_stu_reg_inf_#{stu_reg_inf.id}"]|| params["checkin"]["kuaban_stu_reg_inf_#{stu_reg_inf.id}"]
      checkin = Checkin.new
      checkin.stu_reg_inf_id=stu_reg_inf.id
      checkin.event_id=params[:checkin][:event_id]
      checkin.student_class_id=params[:checkin][:student_class_id]
      checkin.course_id=params[:checkin][:course_id]
      if params["checkin"]["late_stu_reg_inf_#{stu_reg_inf.id}"]
      checkin.late="迟到"  
      checkin.latetime=params["late#{stu_reg_inf.id}"]
      end
      if params["checkin"]["leaver_stu_reg_inf_#{stu_reg_inf.id}"]
      checkin.leaver="早退"  
      checkin.leavertime=params["leaver#{stu_reg_inf.id}"]
      end
      if params["checkin"]["truant_stu_reg_inf_#{stu_reg_inf.id}"]
      checkin.truant="旷课"  
      checkin.truantrecord=params["truant#{stu_reg_inf.id}"]
      end
      if params["checkin"]["kuaban_stu_reg_inf_#{stu_reg_inf.id}"]
      checkin.kuaban="跨班"  
      checkin.kuabanrecord=params["kuaban#{stu_reg_inf.id}"]
      end
      checkin.save
    end
  end
    redirect_to :action =>"show",:id=>params[:checkin][:event_id]