Question

我有一个包含ImageField的modelforms的formset。点击初始表格附近的删除复选框，然后提交按钮 - 我在表格集中有相同数量的表格，并且初始表格的数量相同，但现在已经“删除”的表格没有价值且没有删除复选框（复选框已启用）管理面板，我假设它的小部件呈现）。我做错了什么？

Mixin 结合创建和更新视图：

class HumanAddEditMixin(object):
    u"""
    """
    form_class = HumanForm
    model = Human
    template_name = 'human/add_edit.html'
    object = None

    @method_decorator(login_required)
    def dispatch(self, request, *args, **kwargs):
        return super(HumanAddEditMixin, self).dispatch(request, *args, **kwargs)

    def post(self, request, *args, **kwargs):
        if self.object:
            form = self.form_class(request.POST, instance=self.object)
            sign_formset = SignFormSet(request.POST, request.FILES, instance=self.object)
            description_formset = DescriptionFormSet(request.POST, request.FILES, instance=self.object)
            doc_formset = DocFormSet(request.POST, instance=self.object)
        else:
            form = self.form_class(request.POST)
            sign_formset = SignFormSet(request.POST, request.FILES)
            description_formset = DescriptionFormSet(request.POST, request.FILES)
            doc_formset = DocFormSet(request.POST)

        if form.is_valid() and sign_formset.is_valid() and description_formset.is_valid() and doc_formset.is_valid():
            return self.form_valid(form, sign_formset, description_formset, doc_formset)
        else:
            return self.form_invalid(form, sign_formset, description_formset, doc_formset)

    def form_valid(self, form, sign_formset, description_formset, doc_formset):
        if not self.object:
            self.object = form.save()
            sign_formset.instance = self.object
            description_formset.instance = self.object
            doc_formset.instance = self.object

        sign_formset.save()
        description_formset.save()
        doc_formset.save()

        return HttpResponseRedirect(self.get_success_url())

    def form_invalid(self, form, sign_formset, description_formset, doc_formset):
        return self.render_to_response(
            self.get_context_data(
                form=form,
                sign_formset=sign_formset,
                description_formset=description_formset,
                doc_formset=doc_formset
            )
        )

    def get_success_url(self):
        return reverse('human:list')

CreateView 看起来效果很好：

class HumanAddView(HumanAddEditMixin, CreateView):
    def get_context_data(self, **kwargs):
        context = super(HumanAddView, self).get_context_data(**kwargs)

        context['sign_formset'] = SignFormSet(instance=self.model())
        context['description_formset'] = DescriptionFormSet(instance=self.model())
        context['doc_formset'] = DocFormSet(instance=self.model())

        return context

的UpdateView：

class HumanUpdateView(HumanAddEditMixin, UpdateView):
    pk_url_kwarg = 'human_id'

    def dispatch(self, request, *args, **kwargs):
        self.object = get_object_or_404(self.model, pk=kwargs[self.pk_url_kwarg])

        return super(HumanUpdateView, self).dispatch(request, *args, **kwargs)

    def get_context_data(self, **kwargs):
        context = super(HumanUpdateView, self).get_context_data(**kwargs)

        context['sign_formset'] = SignFormSet(instance=self.object)
        context['description_formset'] = DescriptionFormSet(instance=self.object)
        context['doc_formset'] = DocFormSet(instance=self.object)

        return context

Formsets声明：

SignFormSet = inlineformset_factory(Human, HumanSignImage, form=HumanSignImageForm, extra=1)
DescriptionFormSet = inlineformset_factory(Human, HumanDescriptionImage, form=HumanSignImageForm, extra=1)
DocFormSet = inlineformset_factory(Human, HumanDocImage, form=HumanDocImageForm, extra=1)

其中一个带有图像的模型（在SignFormSet中）和它的模型形式（只有crispy-form帮助器）：

class HumanSignImage(models.Model):

    human = models.ForeignKey('Human', related_name='sign_images')
    image = models.ImageField(upload_to=get_file_path, verbose_name=u'', blank=True, null=True)

    def __unicode__(self):
        return self.image.name

class HumanSignImageForm(CommonImageModelFormWithHelper):
    class Meta:
        model = HumanSignImage

Answer 1

最后我发现我的问题是管理员面板上有两种复选框类型：清除和删除。由于某种原因（使用can_delete = True crispy-forms 不呈现删除复选框here is an answer），我误认为清除是删除

或（没有crispy-forms）覆盖ClearableFileInput小部件（没有清除，但删除），类似的东西：

class ImageFileInput(ClearableFileInput): template_with_initial = '{initial} {input} {delete}' def delete_checkbox_name(self, name): """ Given the name of the file input, return the name of the DELETE checkbox input. """ tmp_list = name.split('-') del tmp_list[-1] delete_checkbox_name = '-'.join(tmp_list) return delete_checkbox_name + '-DELETE' def delete_checkbox_id(self, name): """ Given the name of the delete checkbox input, return the HTML id for it. """ return 'id_' + name def render(self, name, value, attrs=None): substitutions = {} template = '{input}' substitutions['input'] = FileInput().render(name, value, attrs) if value and hasattr(value, "url"): template = self.template_with_initial substitutions['initial'] = format_html( self.url_markup_template, value.url, force_text(value) ) checkbox_name = self.delete_checkbox_name(name) checkbox_id = self.delete_checkbox_id(checkbox_name) substitutions['delete'] = CheckboxInput().render(checkbox_name, False, attrs={'id': checkbox_id}) return mark_safe(template.format(**substitutions))

UpdateView清除已删除的表单但实际上并未将其删除

1 个答案: