Django FormWizard筛选选项字段

Question

以下是我表格的代码：

class ServiceChoiceForm(forms.ModelForm):

    def activated_services(self):
    """
        get the activated services added from the administrator
    """
    all_datas = ()
    data = ()

        services = ServicesActivated.objects.filter(status=1)
        for class_name in services:
            data = (class_name, class_name.name.rsplit('Service', 1)[1])
            all_datas = (data,) + all_datas
        return all_datas


class ProviderForm(ServiceChoiceForm):

    provider = forms.ChoiceField()
    def __init__(self, *args, **kwargs):
        super(ProviderForm, self).__init__(*args, **kwargs)
        self.fields['provider'].choices = self.activated_services()                

    class Meta:
        model = TriggerService
        fields = ('provider', )


class ConsummerForm(ServiceChoiceForm):

    consummer = forms.ChoiceField()

    class Meta:
        model = TriggerService
        fields = ('consummer', )

在我的views.py中，get_form()中，在第0步，我用我的ProviderForm加载数据，如上面所示，然后在第2步，我使用以下代码加载我的ChoiceField中的数据，并尝试用我在步骤0中使用的值过滤数据：

^{pr2}$

但是当我访问ConsummerForm时，我得到了一个错误：

^{3}$

看起来，对于Django，我尝试处理多个模型

那么，如何过滤choicefield消费者的数据呢？在

Answer 1

consummer = ServicesActivated.objects.filter(status=1)
consummer = consummer.exclude(name__exact=data['provider'])
form = ConsummerForm(instance=consummer)

将QuerySet传递给form而不是模型实例： https://docs.djangoproject.com/en/1.5/topics/forms/modelforms/