2017-03-09 37 views
3

存在我正面临的问题。我需要上传包含相关数据的学生的Excel。作为用户输入,我还需要有一批学生。以下是我的代码:Django上传表单,导致错误的其他字段

Views.py

def import_student(request): 
    this_tenant=request.user.tenant 
    if request.method == "POST": 
     form = UploadFileForm(request.POST, request.FILES) 

     def choice_func(row): 
      data=student_validate(row, this_tenant, batch_selected) 
      return data 

     if form.is_valid(): 
      data = form.cleaned_data 
      batch_data= data['batch'] 
      batch_selected=Batch.objects.for_tenant(this_tenant).get(id=batch_data) 

      with transaction.atomic(): 
       try: 
        request.FILES['file'].save_to_database(
         model=Student, 
         initializer=choice_func, 
         mapdict=['first_name', 'last_name',  'dob','gender','blood_group', 'contact', 'email_id', \ 
         'local_id','address_line_1','address_line_2','state','pincode','batch','key','tenant','user']) 
        return redirect('student:student_list') 
       except: 
        transaction.rollback() 
        return HttpResponse("Error") 
     else: 
      print (form.errors) 
      return HttpResponseBadRequest() 
    else: 
     form = UploadFileForm(tenant=this_tenant) 

    return render(request,'upload_form.html',{'form': form,}) 

Forms.py

class UploadFileForm(forms.Form): 
    file = forms.FileField() 
    batch = forms.ModelChoiceField(Batch.objects.all()) 
    def __init__(self,*args,**kwargs): 
     self.tenant=kwargs.pop('tenant',None) 
     super (UploadFileForm,self).__init__(*args,**kwargs) # populates the post 
     self.fields['batch'].queryset =  Batch.objects.for_tenant(self.tenant).all() 
     self.helper = FormHelper(self) 
     self.helper.add_input(Submit('submit', 'Submit', css_class="btn-xs")) 
     self.helper.form_class = 'form-horizontal' 
     self.helper.label_class = 'col-sm-2' 
     self.helper.field_class = 'col-sm-4' 

但是,错误,(我打印的错误)被提交上显示形式是:

<ul class="errorlist"><li>batch<ul class="errorlist"><li>Select a valid choice. That choice is not one of the available choices.</li></ul></li></ul> 

如果我删除批次字段,表单工作得很好。谁能帮我这个?

的后始终得到第一个选项,那就是:不获取选定

<option value="">---------</option> 

与其他值和名称(而不是-------)的其他选项。尽管客户实际上正在选择其他选项。现在

,我发现这个错误是因为下面一行的发生:

self.fields['batch'].queryset = Batch.objects.for_tenant(self.tenant).all() 

没有这一点,形式的伟大工程。但是这条线是必须的。查询集必须动态更新。如何才能做到这一点?

回答

0

当您保存表单时,您必须传递租户参数,否则其查询集将为空,您的选择将不会被选中。

此代码必须工作:

if request.method == "POST": 
    form = UploadFileForm(request.POST, request.FILES, tenant=this_tenant) 
+0

哇,通过化险为夷。谢谢Amin! – Sayantan