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本篇文章给大家分享的是有关如何理解select两级联动查询,小编觉得挺实用的,因此分享给大家学习,希望大家阅读完这篇文章后可以有所收获,话不多说,跟着小编一起来看看吧。
写故障管理系统时,根据主类-平台进行故障搜索,需要用到select两级联动查询
前端html
<form id="tab" class="form-inline" role="form" action='/search/' method='GET' > <!--<div class="panel-heading">--> <div class="form-group"> <select class="form-control" name="Program" id="se_program"> <option value="test_program">请选择主类</option> {% for val in search %} <option value="{{ val }}" {% if val == query %}selected{% endif %}>{{ val }}</option> {% endfor %} </select> <select class="form-control" name="PlatForm" id="se_platform"> <option value="test_platform">请选择平台</option> </select> </div> <button class="btn btn-primary" type="submit"><i class="fa fa-save"></i>search</button> <!--</div>--> </form> <script type="application/javascript"> $(document).ready(function() { $('#se_program').change(function () { se_program = $('#se_program').val(); data = {se_program: se_program}; $.ajax({ url:"/liandong/", data:data, type:'post', success: function(platform){ $("#se_platform").empty(); $("#se_platform").append("<option value='test_platform'>"+"请选择平台"+"</option>"); $.each(platform,function(i){ $("#se_platform").append("<option "+"value=\""+platform[i]+"\">"+platform[i]+"</option>") }) } }) })}) </script>
django后端view
def search(request,page): """ 搜索view,接收前端传来的主类名,匹配数据库获得数据,返回给前端,自定义分页 """ check_Program=request.GET['Program'] check_PlatForm=request.GET['PlatForm'] check_Program=check_Program.encode("utf-8") check_PlatForm=check_PlatForm.encode("utf-8") if check_Program == 'test_program': return HttpResponseRedirect('/index/') if check_Program != 'test_program' and check_PlatForm=='test_platform': ch_result = FaultReports.objects.filter(Program = check_Program) plat=FaultReports.objects.values_list('PlatForm',flat=True).filter(Program = check_Program) plat=set(plat) if ch_result: islogin=False page=gb001.try_int(page, 1) totalitems=FaultReports.objects.filter(Program = check_Program).count() pageInofobj=html.PageInfo(page,totalitems) pager=html.Search_Program_page('/search/',page,pageInofobj.TotalPage(),check_Program) all_data=FaultReports.objects.filter(Program = check_Program).order_by("-id")[pageInofobj.From():pageInofobj.To()] data=FaultReports.objects.values_list("Program",flat=True) data=set(data) try: islogin=request.session['islogin'] except Exception,e: pass if islogin: name =request.session['username'] return render_to_response('search.html',{'login_user':name,'pager':pager,'result':all_data,'search':data,'query':check_Program,'plat':plat}) else: return HttpResponseRedirect('/login/') else: ch_result = FaultReports.objects.filter(Program = check_Program,PlatForm=check_PlatForm) plat=FaultReports.objects.values_list('PlatForm',flat=True).filter(Program = check_Program) plat=set(plat) print plat if ch_result: islogin=False page=gb001.try_int(page, 1) totalitems=FaultReports.objects.filter(Program = check_Program,PlatForm=check_PlatForm).count() pageInofobj=html.PageInfo(page,totalitems) pager=html.Search_Program_page('/search/',page,pageInofobj.TotalPage(),check_Program,check_PlatForm) all_data=FaultReports.objects.filter(Program = check_Program,PlatForm=check_PlatForm).order_by("-id")[pageInofobj.From():pageInofobj.To()] data=FaultReports.objects.values_list("Program",flat=True) data=set(data) try: islogin=request.session['islogin'] except Exception,e: pass if islogin: name =request.session['username'] return render_to_response('search.html',{'login_user':name,'pager':pager,'result':all_data,'search':data,'query':check_Program,'query_platform':check_PlatForm,'plat':plat}) else: return HttpResponseRedirect('/login/')
def liandong(request): if request.method == 'POST': data=request.POST.get('se_program') print request.POST PlatFormList=[] contents = FaultReports.objects.filter(Program=data) for line in contents: if PlatFormList.count(line.PlatForm) ==0: PlatFormList.append(line.PlatForm) platform = PlatFormList #platform=set(platform) #print platform return HttpResponse(json.dumps(platform),content_type="application/json")
以上就是如何理解select两级联动查询,小编相信有部分知识点可能是我们日常工作会见到或用到的。希望你能通过这篇文章学到更多知识。更多详情敬请关注亿速云行业资讯频道。
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