Inline formset causing error: 'NoneType' object has no attribute 'is_ajax'

Question

我正在使用 bootstrap-modal-forms 向用户显示带有一些内联表单的表单集。如果数据仅输入到原始表单中，用户可以保存表单，但如果内联表单集有数据，则会出现以下错误：

'NoneType' object has no attribute 'is_ajax'

在我尝试以模态形式实现内联表单集之前，它们工作正常。问题似乎只有在保存内联表单集 (projectimages) 时才会出现，它是 NoneType。

我的views.py

class ProjectCreate(BSModalCreateView):
    form_class = ProjectForm
    template_name = 'project_form.html'
    success_message = 'Success: %(project_name)s was created.'

    def get_success_url(self):
        return reverse_lazy('project-detail', kwargs={'project': self.object.slug})

    def get_context_data(self, **kwargs):
        data = super(ProjectCreate, self).get_context_data(**kwargs)
        if self.request.POST:
            data['projectimages'] = ProjectFormSet(self.request.POST, self.request.FILES,)
        else:
            data['projectimages'] = ProjectFormSet()
        return data

    def form_valid(self, form):
        form.instance.date_created = timezone.now()
        context = self.get_context_data()
        projectimages = context['projectimages']
        with transaction.atomic():
            self.object = form.save()

            if projectimages.is_valid():
                projectimages.instance = self.object
                projectimages.save()

        return super(ProjectCreate, self).form_valid(form)

我的forms.py

class ProjectForm(BSModalForm):
    class Meta:
        model = Project
        exclude = ['date_created', 'slug']

ProjectFormSet = inlineformset_factory(
    Project,
    ProjectImage,
    can_delete=True,
    form=ProjectForm,
    extra=1,
)

我的models.py

class Project(models.Model):
    project_name = models.CharField(max_length=100)
    date_created = models.DateTimeField('Created on')
    slug = models.SlugField(unique=True)

    def __str__(self):
        return self.project_name

    def save(self, *args, **kwargs):
        self.slug = slugify(str(self))
        super(Project, self).save(*args, **kwargs)

    def get_absolute_url(self):
        return reverse('project-list')

class ProjectImage(models.Model):
    image =  models.ImageField(verbose_name='Additional Images', upload_to=project_directory_path)
    project = models.ForeignKey(Project, on_delete=models.PROTECT)
    annotation = models.CharField(max_length=200, blank=True)

我希望用户能够向模态表单集添加任意数量的图像。

Answer 1

BSModalForm 希望您使用 request 对其进行初始化。这发生在您的 BSModalCreateView 主表单中，但不是您的表单集，因为您手动初始化它。

所以在初始化时，只需添加form_kwargs属性：

 if self.request.POST:
     data['projectimages'] = ProjectFormSet(
         self.request.POST, self.request.FILES,
         form_kwargs={'request': self.request})
 else:
     data['projectimages'] = ProjectFormSet(form_kwargs={'request': self.request})

请注意，我认为您在ProjectFormSet中设置的form是错误的，因为它应该是ProjectImage模型的形式，而不是Project。它实际上应该被称为 ProjectImageFormSet 以更好地反映它是什么。

您可能想要删除 form=ProjectForm，因为它可能不需要是 BSModalForm（对此不确定）。在那种情况下，您不应在 form_kwargs 中传递 request。如果没有，你只需要创建另一个 ProjectImageForm class.

最后，您不应该 return super().form_valid() 因为那样会再次保存主窗体（您已经这样做了）。自己做重定向。

Inline formset causing error: 'NoneType' object has no attribute 'is_ajax'

Inline formset causing error: 'NoneType' object has no attribute 'is_ajax'

python

django

ajax

inline-formset

bootstrap-modal