我试图将动态选择字段添加到adimin形式，但出现错误：
The value of 'form' must inherit from 'BaseModelForm'.
我究竟做错了什么？
（属于admin.py）
class ReservationForm(forms.Form):
class Meta:
model = Reservation
def __init__(self,*args, **kwargs):
super(ReservationForm, self).__init__(*args, **kwargs)
if not self.request.user.is_superuser:
self.fields['status'] = forms.ChoiceField(STATUS_CHOICES = ( (PENDING,'Pending'),(APPROVED, 'Approved'), (CANCELED, 'Canceled') ))
# Reservation
class ReservationAdmin(admin.ModelAdmin):
form = ReservationForm
您ReservationForm不扩展BaseModelForm其任何子类。更改为：
class ReservationForm(forms.ModelForm):
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