Django - form_valid() 变量未定义

Question

我需要获取试图创建评论以存储在模型中的用户的 profile_id。我可以获取用户的属性，因为它们内置在 django 中，但是当我尝试使用下面的内容来获取 profile_id 时，我得到“prof is not defined”错误。

views.py

    class ReviewCreateView(LoginRequiredMixin, CreateView):

      model = Review

      fields = ['rating', 'reviewtext']

      def get_context_data(self, **kwargs):

        context = super(ReviewCreateView, self).get_context_data(**kwargs)

        context['prof'] = Profile.objects.values_list('id', flat=True).filter(user_id=self.request.user.id)

        return context

      def form_valid(self, form):

        form.instance.product = self.request.GET.get('pk')

        form.instance.author = self.request.user

        form.instance.profile = prof

        return super().form_valid(form)

models.py

class Profile(models.Model):

    user = models.OneToOneField(User, on_delete = models.CASCADE)

class Review(models.Model):

    product = models.ForeignKey(Product, on_delete=models.CASCADE)

    profile = models.ForeignKey(Profile, on_delete=models.CASCADE)

    author = models.ForeignKey(User, on_delete=models.CASCADE)

    rating = models.PositiveSmallIntegerField(default=1, validators = [MinValueValidator(1), MaxValueValidator(5)])

    reviewtext = models.TextField()

class Product(models.Model):

    name = models.CharField(max_length=100)

Answer 1

配置文件通过外键链接到用户，所以我可以写下面的行，product_id 也得到一个空约束，直到我添加了 self.kwargs 行。def form_valid(self, form, **kwargs):     form.instance.product_id = self.kwargs['pk']     form.instance.author = self.request.user     form.instance.profile = self.request.user.profile     return super().form_valid(form)