以django形式覆盖max_value

Question

我使用a ModelForm并且我想为一个设置max_value而IntegerField不会丢失从模型创建的其他属性(verbose_name等).

这是我的ModelForm:

class DataForm(ModelForm):
    def __init__(self, *args, **kwargs):
        super(DataForm, self).__init__(*args, **kwargs)
        self.fields['start_range_points'].max_value = 1000
    class Meta():
        model = DataModel

这不起作用,django不对大数应用验证.如果我按以下方式创建字段,验证工作,但我丢失了从模型创建的信息.

class DataForm(ModelForm):
    start_range_points = forms.IntegerField(min_value=0, max_value=1000)
    class Meta():
        model = DataModel

我能做些什么来实现类似于尝试#1的东西？

Answer 1

__init__如果存在max_value,则在IntegerField的函数中添加max_value的验证器.因此,您需要手动添加验证器,例如:

from django.core.validators import MaxValueValidator
class DataForm(ModelForm):
    def __init__(self, *args, **kwargs):
        super(DataForm, self).__init__(*args, **kwargs)
        validators = [ v for v in self.fields['start_range_points'].validators if not isinstance(v, MaxValueValidator) ]
        validators.append( MaxValueValidator(1000) )
        self.fields['start_range_points'].validators = validators

    class Meta():
        model = DataModel