内联表单验证错误不在模板中

Question

我有这个型号：

class dateEvent(models.Model):

link = models.URLField(null=True, blank=True)
link_description = models.CharField(max_length=30, null=True, blank=True)
event = models.ForeignKey('Event', on_delete=models.CASCADE)

class Event(models.Model):
    title = models.CharField(max_length=200)

[...]

views.py:

def event_edit_view(request, id):
    event = get_object_or_404(Event, id=id)
    form_event = EventForm(request.POST or None), instance=event)
    DateEventFormSet = inlineformset_factory(Event, dateEvent, extra=5, can_delete=True, fields=('event', 'start_date_time', 'venue', 'link', 'link_description'),
    widgets={
    'venue': s2forms.Select2Widget(),
    'link': forms.TextInput(attrs={'placeholder': 'http://'}),
    'start_date_time': CalendarWidget(),
    'description_link': forms.TextInput(attrs={'placeholder': 'Link description'}),
    })
    form_date_event = DateEventFormSet(request.POST or None, instance=Event.objects.get(id=id), prefix="dateEvent", queryset=dateEvent.objects.filter(event__id=id))

    if request.method == "POST":

        if form_event.is_valid() and request.POST['action'] == 'submit':
            if form_date_event.is_valid():
                form_event.save()
                form_date_event.save()
                messages.success(request, 'Event updated successfully. See the <a href="/event-detail/' + str(id) + '">detail page</a>')
                return redirect('my-events')
            else:
                raise forms.ValidationError(form_date_event.errors)

        elif form_event.is_valid() and form_date_event.is_valid() and request.POST['action'] == 'update':
            form_event.save()
            form_date_event.save()

        else:
            raise forms.ValidationError([form_event.errors, form_date_event.errors])

    context = {
        'event': event,
        'id': event.id,
        'form_event': form_event,
        'form_date_event': form_date_event,

        }

    return render(request, "events/event-edit.html", context)

和模板：

 <tbody id='date_body'>
  {{ form_date_event.management_form }}
  {{form_date_event}}
 </tbody>

当我在模板上输入非法数据时（例如，URL 字段中的非 URL）Django 通过丑陋的调试界面抛出错误：

ValidationError at myurl...

['Enter a valid URL.']

Request Method:     POST

或者如果关闭调试，则会出现服务器错误 500。为什么我没有在模板上显示错误？

Answer 1

应该在表单而不是视图中引发 ValidationError。通过在视图中引发 ValidationError，您不会呈现模板。这解释了为什么您可以在调试数据中看到错误，但没有呈现页面。 500 错误很可能是因为您的视图在引发错误时未返回 HTTP 响应。该文档包含如何引发视图和表单错误的示例。

Django HTTP View Errors

Django Form Validation Errors

内联表单验证错误不在模板中

inline forms validation errors not in template

django

django-forms

django-views

inline-formset