Django 在运行时形成 integerField 设置 max_value

Question

我有一个这样的表格:

class SomeForm(forms.Form):
 first = forms.IntegerField(max_value= DontWantToSetYet)
 second = forms.IntegerField(max_value= DontWantToSetYet)
 third = forms.IntegerField(max_value= DontWantToSetYet)

如何在运行时设置 max_values？ IE

if request.method == 'POST':
    form = SomeForm(request.POST, max_values = {'first':10,'second':50,'third':666})
    [...]

Answer 1

您可以设置 __init__ 中字段的最大值方法，如下所示

class SomeForm(forms.Form):
    def __init__(self, max_values, *args, **kwargs):
        super(SomeForm, self).__init__(*args, **kwargs)
        self.fields['first'] = forms.IntegerField(max_value=max_values['first'])
        ...

    first = forms.IntegerField(max_value= DontWantToSetYet)
    second = forms.IntegerField(max_value= DontWantToSetYet)
    third = forms.IntegerField(max_value= DontWantToSetYet)

编辑:

self.fields['first'].max_value = max_values['first']

我尝试时没有用，像这样重新定义字段定义有效

self.fields['first'] = forms.IntegerField(max_value=max_values['first'])