Question

您好我最近为管理我的联系表单创建了一个新的应用程序。我有一个名为“手册”的模型和一个模型，其中包含从网站上的联系表单填写的所有信息。但是，当我尝试添加“手册”条目时，我会收到上面显示的错误。这是我的代码，不知道错误出现的原因。

models.py

from django.db import models



class ContactForm(models.Model):
    name = models.CharField(max_length="300")

    company = models.CharField(max_length="200")

    email = models.CharField(max_length="300")

    subject = models.TextField()

    message = models.TextField()

    address = models.TextField()

    brochure = models.ManyToManyField("Brochure", null=True)

    def __unicode__(self):
        self.name

    class Meta:
        verbose_name = "Contact Enquiry"
        verbose_name_plural = "Contact Enquiries"

class Brochure(models.Model):



    title = models.CharField(max_length="200")


    def __unicode__(self):
        self.title


    class Meta:
        verbose_name = "Brochure"
        verbose_name_plural = "Brochures"

views.py

from contact_enquiries import forms
from django.shortcuts import render
from django.http import HttpResponseRedirect


    def contact(request):
        if request.method == 'POST':
            form = forms.ContactEnquiryForm(request.POST)
                    en_form = forms.BrochureRequestForm(request.POST)

                    print(request.POST)
            if form.is_valid():
                #print "Form looks good!"
                #e = models.ContactEnquiry(form.cleaned_data)
                #e.save()
                form.save()
                return HttpResponseRedirect('/thanks/')
        else:
            form = forms.ContactEnquiryForm()
                    en_form = forms.BrochureRequestForm()

        return render(request, 'contact.html', {
                'contact_form' : form,
                            'enquiry_form' : en_form,

                })

forms.py 来自django.forms导入ModelForm 来自django进口表格

from contact_enquiries import models

class ContactEnquiryForm(ModelForm):

    class Meta:
        model = models.ContactForm

        fields=('name','email','company', 'subject', 'message')




class BrochureRequestForm(ModelForm):

    class Meta:
        model = models.ContactForm

        fields = ('name', 'email', 'company', 'address', 'brochure',)

        widgets = {'brochure': forms.CheckboxSelectMultiple()}

非常感谢任何帮助

STACK TRACE

Traceback:
File "/var/www/website.co.uk/website/lib/python2.6/site-packages/django/core/handlers/base.py" in get_response
  115.                         response = callback(request, *callback_args, **callback_kwargs)
File "/var/www/website.co.uk/website/lib/python2.6/site-packages/django/contrib/admin/options.py" in wrapper
  372.                 return self.admin_site.admin_view(view)(*args, **kwargs)
File "/var/www/website.co.uk/website/lib/python2.6/site-packages/django/utils/decorators.py" in _wrapped_view
  91.                     response = view_func(request, *args, **kwargs)
File "/var/www/website.co.uk/website/lib/python2.6/site-packages/django/views/decorators/cache.py" in _wrapped_view_func
  89.         response = view_func(request, *args, **kwargs)
File "/var/www/website.co.uk/website/lib/python2.6/site-packages/django/contrib/admin/sites.py" in inner
  202.             return view(request, *args, **kwargs)
File "/var/www/website.co.uk/website/lib/python2.6/site-packages/django/utils/decorators.py" in _wrapper
  25.             return bound_func(*args, **kwargs)
File "/var/www/website.co.uk/website/lib/python2.6/site-packages/django/utils/decorators.py" in _wrapped_view
  91.                     response = view_func(request, *args, **kwargs)
File "/var/www/website.co.uk/website/lib/python2.6/site-packages/django/utils/decorators.py" in bound_func
  21.                 return func(self, *args2, **kwargs2)
File "/var/www/website.co.uk/website/lib/python2.6/site-packages/django/db/transaction.py" in inner
  223.                 return func(*args, **kwargs)
File "/var/www/website.co.uk/website/lib/python2.6/site-packages/django/contrib/admin/options.py" in add_view
  1009.                 self.log_addition(request, new_object)
File "/var/www/website.co.uk/website/lib/python2.6/site-packages/django/contrib/admin/options.py" in log_addition
  530.             action_flag     = ADDITION
File "/var/www/website.co.uk/website/lib/python2.6/site-packages/django/contrib/admin/models.py" in log_action
  18.         e = self.model(None, None, user_id, content_type_id, smart_text(object_id), object_repr[:200], action_flag, change_message)

Exception Type: TypeError at /admin/contact_enquiries/brochure/add/
Exception Value: 'NoneType' object is unsubscriptable

Answer 1

在您的__unicode__模型方法中ContactForm需要return某事

你可以改变

def __unicode__(self):
    self.name

要

def __unicode__(self):
    return "%s" % self.name

与班级Brochure

相同

异常值：'NoneType'对象是不可取消的

1 个答案: