默认值在表单集中不起作用 - django

Question

我正在尝试为我的 django 内联表单集设置默认值，但它只显示第一个表单，其他为空！

class Booking(models.Model):
    admin = models.ForeignKey(User,on_delete=models.CASCADE)
    takes_by = models.ManyToManyField('vistors.Vistor',through='BookingVisitor',related_name='vistors')

class BookingVisitor(models.Model):
    visitor = models.ForeignKey('vistors.Vistor',on_delete=models.PROTECT,related_name='visitor_booking')
    booking = models.ForeignKey(Booking,on_delete=models.PROTECT,related_name='booking_bookingvisitors')
    reason = models.CharField(max_length=50,default='some text')

但它不起作用！？在我看来，我也试过这个

initial_data = {'reason':'some text'}
VistorsInlineFormset(prefix='formset',initial=initial_data) 

但它会引发此错误：

/en/some/url 处的 KeyError 0

这是我的forms.py

class BookingVisitorForm(forms.ModelForm):
    visitor = forms.ModelChoiceField(
    queryset=Vistor.objects.all().order_by('-pk'),empty_label='--------',

    )

    class Meta:
        model = BookingVisitor
        fields = ['visitor','reason']

VistorsInlineFormset = inlineformset_factory(Booking,BookingVisitor,form=BookingVisitorForm,extra=1,can_delete=True)

Answer 1

来自docs：

>>> formset = ArticleFormSet(initial=[
...     {'title': 'Django is now open source',
...      'pub_date': datetime.date.today(),}
... ])

所以你的代码应该是：

initial_data = [{'reason':'some text'},] # a list
VistorsInlineFormset(prefix='formset',initial=initial_data)