FormView控件不显示验证错误

Question

我model.py样子：

class VehicleInquiry(TimeStampedModel): 
    inquiry_status = models.PositiveSmallIntegerField(_("inquiry status"), choices=INQUIRY_STATUS_CHOICES, default=1) 
    ip = models.GenericIPAddressField(_("IP"), blank=True, null=True) 
    full_name = models.CharField(_("full name"), max_length=100) 
    address = models.CharField(_("address"), max_length=200) 
    phone_code = models.PositiveSmallIntegerField(_("phone code") 
    ) 
    phone = models.CharField(_("phone"), max_length=20) 
    email = models.EmailField(_("email")) 

is_subscribed = models.BooleanField(_("subscribed"), default=True) 
vehicle = models.ForeignKey(VehicleStock, on_delete=models.SET_NULL, blank=True, null=True, 
         related_name="inquiries", verbose_name=_("vehicle") 
) 
country = models.ForeignKey(Country, on_delete=models.SET_NULL, blank=True, null=True, 
         related_name="inquiries", verbose_name=_("country") 
) 
arrival_port = models.ForeignKey(CountryPorts, on_delete=models.SET_NULL, blank=True, null=True, 
         related_name="inquiries", verbose_name=_("arrival port") 
) 

current_price = models.PositiveIntegerField(_('current price'), null=True, blank=True) 
inspection = models.BooleanField(_("pre-export inspection"), default=False) 
insurance = models.BooleanField(_("insurance"), default=True) 
total = models.PositiveIntegerField(_('total price'), null=True, blank=True) 

我form.py：

class VehicleInquiryForm(forms.ModelForm): 
    country2 = forms.TypedChoiceField(
     label=_("Country"), 
     choices=[('','Arrival Country')]+[(country.id, country.name) for country in Country.objects.all().filter(visible=True).order_by('name')], 
     required=True, 
    ) 
    phone_code = ChoiceFieldWithTitles(
     label=_("Country dialing code"), 
     choices=[('','Dailing Code', 'Dailing Code')]+[(country.id, '{} (+{})'.format(country.name, country.phone_code), '+{}'.format(country.phone_code)) for country in Country.objects.all().filter(visible=True).order_by('name')], 
     required=True, 
    ) 
    arrival_port = forms.TypedChoiceField(
     label=False, 
     widget=forms.RadioSelect 
    )  

    phone = forms.CharField(
     label=_("Phone"), 
     max_length=20, 
     required=True, 
     validators=[phone_number_validator] 
     ) 

    full_name = StrippedCharField(
     label=_("Full name"), 
     max_length=30, 
     required=True, 
     validators=[full_name_validator] 
     ) 

    address = StrippedCharField(
     label=_("Address"), 
     max_length=200, 
     required=True 
     )   

    class Meta: 
     model = VehicleInquiry 
     exclude = ('inquiry_status', 'vehicle', 'current_price', 'total')  


    def clean_country2(self): 
     country_id = self.cleaned_data['country2'] 
     try: 
      country = Country.objects.get(id=country_id) 
     except Country.DoesNotExist: 
      raise forms.ValidationError(_('Please select the country')) 
     return country_id 

    def clean(self): 
     cleaned_data = super(VehicleInquiryForm, self).clean() 
     dialing_code = cleaned_data['phone_code'] 
     try: 
      dialing_country = Country.objects.get(id=dialing_code) 
     except Country.DoesNotExist: 
      raise forms.ValidationError(_('Please select the phone code')) 
     return self.cleaned_data 

    def __init__(self, *args, **kwargs): 
     dialing_code = kwargs.pop('phone_code', None) 
     super(VehicleInquiryForm, self).__init__(*args, **kwargs) 
     self.fields['is_subscribed'].label = _("Keep me updated with news, specials offers and more.") 
     self.helper = FormHelper() 
     self.helper.template_pack = "bootstrap3" 
     self.helper.form_method = "post" 
     self.helper.form_id = "vehicle-shipping-form" 
     self.helper.form_show_errors = True 
     self.initial['insurance'] = True 
     self.fields['phone_code'].initial = dialing_code 
     self.helper.add_input(
      Submit('inquiry', _('Inquiry'), css_class='btn btn-default',) 
     ) 
     self.helper.form_method = 'post' 
     self.helper.layout = Layout(
      Fieldset(
      _("1. Choose Your Final Destination"), 
      Div(
       Field('country2', css_class="order-select-country"), 
      ), 
-- other fields -- 
) 

view.py

class VehicleStockDetailView(FormView): 
    template_name = "site/product/vehicle-detail.html" 
    template_name_done = "site/contact/contact-us-done.html" 
    template_name_done_email = "site/contact/emails/contact-us-done.html" 
    form_class = VehicleInquiryForm 
    model = VehicleStock 

    def get(self, request, slug, *args, **kwargs): 
     form_class = self.get_form_class() 
     form = self.get_form(form_class) 
     vehicle = get_object_or_404(VehicleStock, slug=slug) 
     similar_vehicles = VehicleStock.objects.get_public_available().filter(model__id=vehicle.model.id).exclude(slug=slug)[:6] 
     page_title = vehicle.model 

     return render(request, self.template_name, {'page_title': page_title, 'similar_products': similar_vehicles, 'stock_product': vehicle, 'shipping_form': form}) 

    def post(self, request, slug, *args, **kwargs): 
     form_class = self.get_form_class() 
     form = self.get_form(form_class) 
     vehicle = get_object_or_404(VehicleStock, slug=slug) 
     similar_vehicles = VehicleStock.objects.get_public_available().filter(model__id=vehicle.model.id).exclude(slug=slug)[:6] 
     page_title = vehicle.model 
     if form.is_valid(): 
      form.save() 
      return render(self.request, self.template_name_done, {'full_name': request.POST['full_name'], 'email': request.POST['email']}) 

     return render(self.request, self.template_name, {'page_title': page_title, 'similar_products': similar_vehicles, 'stock_product': vehicle, 'shipping_form': form}) 

url.py

url(r'^vehicle/(?P<slug>[-_\w]+)/$', VehicleStockDetailView.as_view(), name='vehicle-detail'), 

现在，当我填写表单并发送查询时，它不会显示任何错误，但会再次显示除phone_code（它显示默认值）之外的输入字段值的表单。没有错误显示，但表单未经验证。我用TemplateView和FormView尝试了不同的方法。但没有成功。不需要任何帮助。

Answer 1

您尚未将POST数据传递到任何地方的表单。

这是你不应该凌驾get和post方法的原因之一。各种基于班级的观点的重点是，他们几乎为你做了所有这些。您应该从CreateView继承，以便表单在有效时保存，并且您添加的额外逻辑应该在get_context_data之间 - 如您所见，这样可避免必须包含相同的代码两次。

class VehicleStockDetailView(CreateView): 
    template_name = "site/product/vehicle-detail.html" 
    template_name_done = "site/contact/contact-us-done.html" 
    template_name_done_email = "site/contact/emails/contact-us-done.html" 
    form_class = VehicleInquiryForm 
    model = VehicleStock 

    def get_context_data(self, *args, **kwargs): 
     context = super(VehicleStockDetailView, self).get_context_data(*args, **kwargs) 
     context['vehicle'] = get_object_or_404(VehicleStock, slug=self.kwargs['slug']) 
     context['similar_vehicles'] = VehicleStock.objects.get_public_available().filter(model__id=vehicle.model.id).exclude(slug=slug)[:6] 
     context['page_title'] = vehicle.model 

     return context 

    def form_valid(self, form, *args, **kwargs): 
     obj = form.save() 
     return render(self.request, self.template_name_done, {'full_name': self.request.POST['full_name'], 'email': self.request.POST['email']}) 

请注意，你真的不应该直接渲染模板成功;你应该总是重定向。同样，表单视图为您处理此问题。