Question

我有一个由动态字段组成的抽象Form类：

class AddressForm(forms.Form):
  def __init__(self, all_required=True, *args, **kwargs):
    super(AddressForm, self).__init__(*args, **kwargs)
    self.fields['street_num'] = forms.CharField(max_length=10, label='Street number', required=all_required)
    self.fields['street_dir'] = DirectionFormField(required=all_required)
    self.fields['street_name'] = forms.CharField(max_length=35, required=all_required)
    self.fields['city'] = forms.CharField(max_length=35, required=all_required)
    self.fields['state'] = forms.ChoiceField(choices=STATE_ABBREVS, required=all_required)
    self.fields['zip'] = ZipCodeFormField(max_length=5, required=all_required)

  class Meta:
    abstract = True

以下是我使用它的方式：

class AddressCreateForm(AddressForm):
  name = forms.CharField(max_length=30)

如果我在视图中的AddressCreateForm对象上调用is_valid（），我发现它总是返回false。但是，不会返回任何错误。如果AddressForm类没有如下的动态字段，那么一切正常：

class AddressForm(forms.Form):
  street_num = forms.CharField(max_length=10, label='Street number')
  street_dir = DirectionFormField()
  street_name = forms.CharField(max_length=35)
  city = forms.CharField(max_length=35)
  state = forms.ChoiceField(choices=STATE_ABBREVS)
  zip = ZipCodeFormField(max_length=5)

  class Meta:
    abstract = True

我在课堂上遗漏了哪些动态字段？

根据Fiver的建议，__init__应该以此开头：

class AddressForm(forms.Form):
  def __init__(self, *args, **kwargs):
    if kwargs.get('all_required') == None:
      all_required = True
    else:
      all_required = kwargs['all_required']
      kwargs.pop('all_required')

    super(AddressForm, self).__init__(*args, **kwargs)
    #...

这很有效。

使用动态字段验证抽象元类

0 个答案: