Django模型表单同时保存两次post请求

I am using django-bootstrap-modal-forms 1.3.1 following https://pypi.org/project/django-bootstrap-modal-forms/ but if I run it's project of books it calls the post request to create book twice but saves the from once.

当我使用它时，它会发出两次发布请求，但两个请求都用空文件保存一个，即一个帖子保存模态的所有字段，例如title description, date但不是upload（文件），下一篇文章将保存所有内容upload同时地

这是我的模型：

class File(models.Model):
    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
    author = models.ForeignKey(User, on_delete=models.CASCADE)
    visible_to_home = models.ManyToManyField(Home, blank=True)  # when none visible to all home
    visible_to_company = models.ManyToManyField(Company, blank=True)  # when none visible to all company
# To determine visibility, check if vtc is none or include company of user and if true, check same for home
    created_date = models.DateTimeField(auto_now=True)
    published = models.BooleanField(default=True)
    upload = models.FileField(blank=True, null=True, upload_to=update_filename)
    title = models.CharField(max_length=225, blank=True, null=True)
    description = models.TextField(blank=True, null=True)

如果我删除作者，那么它工作正常，但根据我的要求，我需要作者。

class FileForm(PopRequestMixin, CreateUpdateAjaxMixin, forms.ModelForm):
    class Meta:
        model = File
        fields = ('title', 'description', 'upload')

View

class FileCreateView(PassRequestMixin, SuccessMessageMixin,
                 CreateView):
    template_name = 'file/upload-file.html'
    form_class = FileForm
    success_message = 'File was uploaded successfully'
    success_url = reverse_lazy('home')

    def post(self, *args, **kwargs):
        """
        Handle POST requests: instantiate a form instance with the passed
        POST variables and then check if it's valid.
        """
        form = self.get_form()
        # form = self.form_class(self.request.POST, self.request.FILES)
        if self.request.method == 'POST':
            if form.is_valid():
                file = form.save(commit=False)
                file.upload = form.cleaned_data['upload']
                file.author = User.objects.get(pk=self.request.user.pk)
                file.save()
                return self.form_valid(form)
            else:
                return self.form_invalid(form)

首页.html

{% block extrascripts %}
<script type="text/javascript">
$(function () {
  $(".upload-file").modalForm({formURL: "{% url 'file-upload' %}"});
 });
</script>
{% endblock extrascripts %}

其他与示例实现相同。

尝试这个：

 if form.is_valid():
     if not self.request.is_ajax():
         file = form.save(commit=False)
         file.upload = form.cleaned_data['upload']
         file.author = User.objects.get(pk=self.request.user.pk)
         file.save()