Question

我似乎无法在表单的ModelChoiceField中重新标记空标签。我试过了。（注意我使用django crispy表单进行表单布局 - 不应该干扰它）

Forms.py

class PaymentForm(forms.ModelForm):
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.fields['payment_day'].empty_label = 'test something'
        self.helper = FormHelper(self)
        self.helper.label_class = 'sr-only'
        self.helper.form_tag = False
        self.helper.layout = Layout(
            ......
            PrependedText('payment-day', '<i class="fa fa-calendar"></i>', placeholder="What"),
        )

    class Meta:
        model = DirectDebit
        fields = [
                  ......
                  'payment_day',
                  ]

models.py

class DirectDebit(models.Model):
    user = models.ForeignKey(settings.AUTH_USER_MODEL)
    ......

    DAYS_OF_MONTH_CHOICES = [(i, i) for i in range(32)]
    payment_day = models.IntegerField(choices=DAYS_OF_MONTH_CHOICES)

    time_stamp = models.DateField(auto_now=True)

Answer 1

当您设置empty_label时，可能为时已晚，因为已经计算了字段的选择。尝试将查询集重新分配给自己，以查看是否触发了重新计算的选择。

super().__init__(*args, **kwargs)
self.fields['payment_day'].empty_label = 'test something'
self.fields['payment_day'].queryset = self.fields['payment_day'].queryset

Answer 2

解决：

self.fields['payment_day'].choices = [('', '---- Please select your payment day ----')] + list(
            self.fields['payment_day'].choices[1:])

django不能重新标记TypedChoiceField中的空标签

2 个答案: