Django FormWizard滤波ChoiceField

Question

这是我的表格代码：

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 in get_form()中，在步骤0中，我用我的ProviderForm加载数据，就像我们在上面看到的那样，然后在第2步，我使用下面的代码在get_form()中加载数据，并尝试使用步骤0使用的值来过滤数据：

def get_form(self, step=None, data=None, files=None):
    if step == '2':
        data = self.get_cleaned_data_for_step('0')
        consummer = ServicesActivated.objects.filter(status=1)
        consummer = consummer.exclude(name__exact=data['provider'])
        form = ConsummerForm(instance=consummer)

但是，当我访问ConsummerForm时，我得到了错误：

'QuerySet' object has no attribute '_meta'

对于Django来说，我试图处理多个模型

那么，我如何过滤我的选择领域消费者的数据呢？

Answer 1

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

您正在传递一个QuerySet来形成，而不是一个模型实例：https://docs.djangoproject.com/en/1.5/topics/forms/modelforms/