Question

每当我将数据输入数据库时，然后单击提交时，我都会遇到代码问题，这将导致错误Multyvaluekeyerror。我更改了表单值很多次，但是没有任何效果。请帮我解决这个问题.....非常感谢。

control.addOption({id: data.agentType, text: data.agentType});


    MultiValueDictKeyError at /admin/criminals
    'gender'
    Request Method: POST
    Request URL:    http://127.0.0.1:8000/admin/criminals
    Django Version: 2.2.4
    Exception Type: MultiValueDictKeyError
    Exception Value:    
    'gender'
    Exception Location: C:\Users\lenovo\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\utils\datastructures.py in __getitem__, line 80
    Python Executable:  C:\Users\lenovo\AppData\Local\Programs\Python\Python37-32\python.exe
    Python Version: 3.7.4
    Python Path:    
    ['D:\\django project\\gadmin3',
     'C:\\Users\\lenovo\\AppData\\Local\\Programs\\Python\\Python37-32\\python37.zip',
     'C:\\Users\\lenovo\\AppData\\Local\\Programs\\Python\\Python37-32\\DLLs',
     'C:\\Users\\lenovo\\AppData\\Local\\Programs\\Python\\Python37-32\\lib',
     'C:\\Users\\lenovo\\AppData\\Local\\Programs\\Python\\Python37-32',
     'C:\\Users\\lenovo\\AppData\\Roaming\\Python\\Python37\\site-packages',
     'C:\\Users\\lenovo\\AppData\\Local\\Programs\\Python\\Python37-32\\lib\\site-packages']
    Server time:    Mon, 7 Oct 2019 04:35:54 +0000

查看侧码：-

MAIN FORM CODE:-
    <div class="form-group">
       <label class="control-label col-md-3 col-sm-3 col-xs-12">Gender</label>
       <div class="col-md-6 col-sm-6 col-xs-12">
          <div name="gender" id="" class="btn-group" data-toggle="buttons">
             <label class="btn btn-default" data-toggle-class="btn-primary" 
                data-toggle-passive-class="btn-default">
             <input type="radio" name="" value="male" data-parsley- 
                multiple="gender"> &nbsp; Male &nbsp;
             </label>
             <label class="btn btn-primary" data-toggle-class="btn-primary" 
                data-toggle-passive-class="btn-default">
             <input type="radio" name="" value="female" data-parsley- 
                multiple="gender"> Female
             </label>
          </div>
       </div>
    </div>

Answer 1

cache-and-network:是单选按钮（也可以在表单中添加名称），如果未选择任何选项，则不会得到任何输入。

为避免此问题，请使用gender方法从get请求中提取值。

POST

这将消除crgen = request.POST.get('gender', default_value)问题

Answer 2

您的输入中有名称，例如

<input type="radio" name="" value="female" data-parsley-

应该是

<input type="radio" name="gender" value="female" data-parsley-

您的代码可以进一步重构为：

def criminals(request):
             if request.method=="POST":
                    s= Criminals(mname=request.POST['crname'],
                                ccrime=request.POST['crime'], 
                                mage=request.POST['age'],
                                mheight= request.POST['height'],
                                mbody=request.POST['bodymark'], 
                                mgender=request.POST['gender'])
                    s.save()
                    messages.success(request,"Criminal Added Successfully.")
                    return render(request,'criminal.html')
                else:
                    return render(request,'criminal.html')

/ admin / criminals'gender'处的MultiValueDictKeyError

2 个答案: