从 Django ModelForm 中动态排除字段

Question

我想以编程方式排除表单中的一个字段。 目前我有这个：

class RandomForm(BaseForm):
    def __init__(self, *args, **kwargs):

        # This doesn't work
        if kwargs["instance"] is None:
            self._meta.exclude = ("active",)

        super(ServiceForm, self).__init__(*args, **kwargs)

        # This doesn't work either
        if kwargs["instance"] is None:
            self._meta.exclude = ("active",)

    class Meta:
        model = models.Service
        fields = (...some fields...)

如何仅在创建新模型时排除 active 字段？

Answer 1

你可以这样解决：

class RandomForm(ModelForm):
    def __init__(self, *args, **kwargs):
        super(RandomForm, self).__init__(*args, **kwargs)
        if not self.instance:
            self.fields.pop('active')

    class Meta:
        model = models.Service
        fields = (...some fields...)

Answer 2

Django ModelForm 提供 exclude 属性。你试过了吗？

class RandomForm(ModelForm):

    class Meta:
        model = models.Service
        exclude = ['is_active']