Question

我使用相同的crispy形式进行添加和编辑，并添加了一个变量，因此我可以将提交按钮文本从添加更改为编辑，反之亦然。

但是，添加视图会出现以下错误：

Traceback: (removed the in built references) 

...

File "/itapp/itapp/sites/views.py" in dispatch
  954.         return super(AddSubnet, self).dispatch(*args, **kwargs)

...

File "/itapp/itapp/sites/views.py" in get_context_data
  969.         context = super().get_context_data(**kwargs)

File "/usr/local/lib/python3.6/site-packages/django/views/generic/edit.py" in get_context_data
  93.             kwargs['form'] = self.get_form()

File "/usr/local/lib/python3.6/site-packages/django/views/generic/edit.py" in get_form
  45.         return form_class(**self.get_form_kwargs())

Exception Type: TypeError at /sites/site/add_subnet/7
Exception Value: 'SubnetForm' object is not callable

我不确定为什么因为表格的代码看起来对我不熟练的眼睛来说至少无论如何

forms.py：

class SubnetForm(forms.ModelForm):
    class Meta:
        model = SiteSubnets
        fields = ['subnet', 'subnet_type', 'circuit', 'device_data', 'vlan_id', 'peer_desc']

    def __init__(self, *args, **kwargs):
        site_id = kwargs.pop('site_id', None)
        self.is_add = kwargs.pop("is_add", False)
        super(SubnetForm, self).__init__(*args, **kwargs)
        self.fields['circuit'].queryset = Circuits.objects.filter(site_data=site_id)
        self.helper = FormHelper(self)
        self.helper.form_id = 'subnet_form'
        self.helper.form_method = 'POST'
        self.helper.add_input(Submit('submit', 'Add Subnet' if self.is_add else 'Edit Subnet', css_class='btn-primary'))
        self.helper.layout = Layout(
            Div(    
                Div(
                    Field('subnet', placeholder='Subnet'),
                    Div('subnet_type', title="Subnet Type"),
                    css_class='col-lg-3'
                ),
                Div(
                    Div('circuit', title='Circuit'),
                    Div('device_data', title="Device Data"),
                    css_class='col-lg-3'
                ),
                Div(
                    Field('vlan_id', placeholder='VLAN ID'),
                    Field('peer_desc', placeholder="Peer Description"),
                    css_class='col-lg-3'
                ),
            css_class='row'
            )
        )

查看：

class AddSubnet(CreateView):
    form_class = SubnetForm(is_add=True)
    template_name = "sites/subnet_form.html"

    @method_decorator(user_passes_test(lambda u: u.has_perm('config.add_subnet')))
    def dispatch(self, *args, **kwargs):
        self.site_id = self.kwargs['site_id']
        self.site = get_object_or_404(SiteData, pk=self.site_id) 
        return super(AddSubnet, self).dispatch(*args, **kwargs)

    def get_success_url(self, **kwargs):         
            return reverse_lazy("sites:site_detail_subnets", args=(self.site_id,))

    def form_valid(self, form):
        form.instance.site_data = self.site
        return super(AddSubnet, self).form_valid(form)

    def get_form_kwargs(self, *args, **kwargs):
        kwargs = super().get_form_kwargs()
        kwargs['site_id'] = self.site_id
        return kwargs

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        context['SiteID']=self.site_id
        context['SiteName']=self.site.location
        context['FormType']='Add'
        context['active_subnets']='class="active"'

        return context

class EditSubnet(UpdateView):
    model = SiteSubnets
    form_class = SubnetForm
    template_name = "sites/subnet_form.html"

    @method_decorator(user_passes_test(lambda u: u.has_perm('config.edit_subnet')))
    def dispatch(self, *args, **kwargs):
        self.site_id = self.kwargs['site_id']
        self.site = get_object_or_404(SiteData, pk=self.site_id) 
        return super(EditSubnet, self).dispatch(*args, **kwargs)

    def get_success_url(self, **kwargs):         
            return reverse_lazy("sites:site_detail_subnets", args=(self.site_id,))

    def form_valid(self, form):
        form.instance.site_data = self.object.site_data
        return super(EditSubnet, self).form_valid(form)

    def get_form_kwargs(self, *args, **kwargs):
        kwargs = super().get_form_kwargs()
        return kwargs

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        context['SiteID']=self.site_id
        context['SiteName']=self.site.location
        context['FormType']='Edit'
        context['active_subnets']='class="active"'

        return context

Answer 1

这是罪魁祸首：form_class = SubnetForm(is_add=True)。 form_class应该是名称所指示的内容，只是class，而不是实例。使用get_form_kwargs将初始化参数添加到表单构造函数调用中（正如您对site_id所做的那样）：

class AddSubnet(CreateView):
    form_class = SubnetForm   # just the form CLASS
    # ...

    def get_form_kwargs(self, *args, **kwargs):
        kwargs = super().get_form_kwargs()
        kwargs['is_add'] = True  # you can set 'is_add' here
        kwargs['site_id'] = self.site_id
        return kwargs

Django Update和CreateView使用相同的Crispy Form，添加视图错误

1 个答案: