Django - 如何使 CloudinaryField 不是强制性的以及如何允许用户删除他们上传的图像?

Django - how to make a CloudinaryField not mandatory and how to allow user to delete their uploaded image?

嘿,我刚开始学习Django,我希望我的用户能够上传个人资料图片,所以我用个人资料模型扩展了用户模型,但是,到目前为止我还没有弄清楚如何使图像上传成为非强制性的。当用户添加图片时,我希望他们也能够将其删除。

Screenshot - Not able to Submit without adding file

Screenshot - Not able to remove the added file

models.py

class Profile(models.Model):
user = models.OneToOneField(User, on_delete=models.CASCADE)
bio = models.TextField()
profile_image = CloudinaryField('profile_image')

def __str__(self):
    return self.user.username

forms.py

class ProfileForm(ModelForm):
class Meta:
    model = Profile
    fields = ('bio', 'profile_image',)

views.py

@login_required(login_url='login')
def createPost(request):
form = PostForm()

if request.method == "POST":
    form = PostForm(request.POST, request.FILES)
    # request.FILES necessary so that file is submitted
    # also required to add enctype to the form
    if form.is_valid():
        post = form.save(commit=False)
        post.author = request.user
        post.save()
        return redirect('home')

context = {'form': form}
return render(request, 'my8gag/post_form.html', context)

无法在文档中或 SO 此处找到任何关于此的内容,因此将不胜感激 help/hints!提前致谢。

允许字段为空

class Profile(models.Model):
  user = models.OneToOneField(User, on_delete=models.CASCADE)
  bio = models.TextField()
  profile_image = CloudinaryField('profile_image', null=True, default=None, blank=True)

  def __str__(self):
    return self.user.username