具有继承模型的ModelForm的表单字段

Question

我有一个抽象模型,定义了一些字段,以及从中继承的其他模型.如果我为这个模型定义一个表单,基本字段没有定义,我不能在表单中使用它.

如果我用字段指定它我会收到此错误:

例外值:为经销商指定的未知字段(created_at,updated_at)

异常位置:C:\ Python27\lib\site-packages\django\forms\models.py in new,line 215

这是我的代码:

class BaseModel(models.Model):
    created_at = models.DateTimeField(default=datetime.now, editable=False)
    updated_at = models.DateTimeField(auto_now=True)
    class Meta:
        abstract = True


class Reseller(BaseModel):
    name = models.CharField(_("name"), max_length=255, unique=True)

class ResellerForm(forms.ModelForm):
    class Meta:
        model = Reseller
        fields = ('name','created_at','updated_at')

UPD

它可以通过这三个类清晰地重现新的空项目.它在表单导入失败

 from jjj.forms import ResellerForm
Traceback (most recent call last):
  File "", line 1, in 
  File "C:\Users\ShapeR\PycharmProjects\djt\jjj\forms.py", line 4, in 
    class ResellerForm(forms.ModelForm):
  File "C:\Python27\lib\site-packages\django\forms\models.py", line 214, in __new__
    raise FieldError(message)
FieldError: Unknown field(s) (created_at, updated_at) specified for Reseller

Answer 1

created_at = models.DateTimeField(default=datetime.now, editable=False)
updated_at = models.DateTimeField(auto_now=True)

http://docs.djangoproject.com/en/dev/ref/models/fields/#editable

Field.editable

如果为False,则该字段将不会在管理员中或通过从模型类自动生成的表单中进行编辑.默认为True.

也

注意

如当前实现的那样,将auto_now或auto_now_add设置为True将导致该字段具有editable = False和blank = True set.