django - Django - 以 __init__ 形式更改 min_length？

Question

有什么办法可以在表单构造函数中更改字段的 *min_length* 参数？这不起作用：

def __init__(self, *args, **kwargs):
    super(CreateTeamForm, self).__init__(*args, **kwargs)
    self.fields['primary_color'].min_length = 4

Answer 1

尝试validators在方法中设置字段的属性__init__。

from django.core.validators import MinLengthValidator

class MyForm(forms.Form):
    primary_color = forms.CharField()
    def __init__(self, *args, **kwargs):
        super(MyForm, self).__init__(*args, **kwargs)
        # get all the validators on the field which are not MinLengthValidator
        validators = [v for v in self.fields['primary_color'].validators if not isinstance(v, MinLengthValidator)]
        min_length = 10
        validators.append(MinLengthValidator(min_length))
        self.fields['primary_color'].validators = validators