如何在Django中修复表单验证“ unknow”

Question

当我使用单一形式没有问题，但是当我在基于类的视图中使用多重形式时，图像字段的验证失败。我试图修复堆栈溢出中提供的先前解决方案，但无法解决。

views.py

视图中的代码

class ProfileEditView(View):
    profile_class = ProfileForm
    profile_image_class = ProfileImageForm
    template_name = 'user/profile_edit.html'

    def get(self,request,pk):
        if pk:
            user = User.objects.get(pk=pk)
            profile = Profile.objects.get(user = user)
            profile_image = ProfileImage.objects.get(user = user)
            profile_form = self.profile_class(instance = profile)
            profile_image_form = self.profile_image_class(instance = profile_image)

            context = {
            'profile_form':profile_form,
            'profile_image_form':profile_image_form
            }
            return render(request, self.template_name, context)
        else:
            profile_form = self.profile_class(None)
            profile_image_form = self.profile_image_class(None)
            context = {
                'profile_form':profile_form,
                'profile_image_form':profile_image_form
            }
            return render(request, self.template_name, context)

    def post(self,request,pk=None, **kwargs):

        profile_form = self.profile_class(request.POST,instance=Profile())
        profile_image_form = self.profile_image_class(request.POST,instance=ProfileImage())

        if profile_image_form.is_valid(): #and profile_image_form.is_valid():
            profile = profile_form.save(commit=False)
            profile_image = profile_image_form.save(commit=False)


            profile.user = self.request.user
            profile_image.user = self.request.user

            profile.save()
            profile_image.save()

            return redirect('music:album_list')

        context = {
                'profile_form':profile_form,
                'profile_image_form':profile_image_form,
                'error_message':'Something went wrong',
            }
        return render(request, self.template_name, context)

models.py

模型中的代码

def get_profile_upload_to(instance,filename):
    new_filename = '{}.{}'.format(uuid4,filename.split('.')[-1])
    return "profile/{}/{}".format(instance.user.id, new_filename)


class ProfileImage(models.Model):
    user = models.OneToOneField(User,on_delete=models.CASCADE)
    image = models.ImageField(upload_to=get_profile_upload_to)
    uploaded = models.DateTimeField(auto_now=True)

class Profile(models.Model):
    user = models.OneToOneField(User,on_delete=models.CASCADE)
    bio = models.TextField(max_length=500,null=True, blank=True)
    location = models.CharField(max_length=50,null=True, blank=True)
    birth_date = models.DateField(null=True, blank=True)
    email_confirmed = models.BooleanField(default=False)

form.py

form.py中的代码

class ProfileImageForm(forms.ModelForm):

    class Meta:
        model = ProfileImage
        fields = ['image']

class ProfileForm(forms.ModelForm):

    class Meta:
        model = Profile
        fields = ['birth_date']

profile_edit.html

HTML页面中的代码。

<form method="post" enctype="multipart/form-data">{% csrf_token %}
    {{error_message}}

    {{profile_form}}
    {{profile_image_form}}
    <button type="submit">Submit</button>
</form>

错误代码

当我打印表单时，is_valid出现在行下方。不知道为什么图像字段验证为假

[21/Oct/2019 08:24:24] "POST /user/profile/46/ HTTP/1.1" 200 2861
profile_form is : True
profile_image_form is : False
profile_form is : <bound method BaseForm.is_valid of <ProfileForm bound=True, valid=True, fields=(birth_date)>>
profile_image_form is : <bound method BaseForm.is_valid of <ProfileImageForm bound=True, valid=False, fields=(image)>>

Answer 1

这里有很多错误。例如，您的profile_form甚至似乎都不是表格。

但是您的直接错误是您没有将FILES数据传递给图像表单。应该是：

    profile_image_form = self.profile_image_class(request.POST, request.FILES)

（请注意，没有必要传递一个空实例，请将其忽略。）

还要确保模板中的表单具有正确的enctype：

<form action="" method="post" enctype="mulitpart/form-data">