Django updateView saving another instance instead of updating

问题

im trying to update my model but it just creates another instance and i cant figure out why. i was under the impression that all i needed was:

class QuestionUpdate(generic.UpdateView):
    model = models.Question
    form_class = QuestionForm

and it would take care of it for me but that doesnt seem to be the case. im in django 1.11 and running python 3.6. Any and all help is appreciated.

models.py

class Question(models.Model):
    class Meta:
        ordering = ['-date_updated']
    # user = models.ForeignKey(User, related_name="question", default='')
    question = models.TextField(unique=False, blank=False, null=False)
    question_html = models.TextField(blank=False, null=False)
    answer = models.TextField(blank=False, null=False)
    answer_html = models.TextField(blank=False,null=False)
    date_created = models.DateTimeField(auto_now=True, null=True)
    date_updated = models.DateTimeField(auto_now=True, null=True)

    def __str__(self):
        return self.question
        # ^ to display an object in the Django admin site and
        # as the value inserted into a template when it displays an object.

    def save(self, *args, **kwargs):
        self.question_html = misaka.html(self.question)
        self.answer_html = misaka.html(self.answer)
        super().save(*args, **kwargs)

views.py

class QuestionUpdate(generic.UpdateView):
    model = models.Question
    form_class = QuestionForm
    # fields = ('question', 'answer')

    def edit_question(self, request, id):
        question = get_object_or_404(Question, id=id)
        form = QuestionForm(request.POST, instance=question)
        if form.is_valid():
            form.save()

forms.py

class QuestionForm(forms.ModelForm):
# your_name = forms.CharField(label='Your name', max_length=100)

    class Meta:
        fields = ("question", 'answer')
        model = models.Question

urls.py

url(r'questionupdate/(?P<pk>\d+)/$', views.QuestionUpdate.as_view(), name='update'),

来源：https://stackoverflow.com/questions/49341267/django-updateview-saving-another-instance-instead-of-updating

标签

python

django

django-models

django-views