Django modelform 根据其他字段选择删除 "required"属性

Question

我有几个字段的 ModelForm。有些字段是必需的，有些则不是。此外，我有具有不同选择的 Select 字段，我想根据此 Select 字段选择使某些字段“必填”或不“必填”。

我在 Form 的 clean() 方法中尝试过

def clean(self):
    cleaned_data = self.cleaned_data
    some_field = cleaned_data.get("some_field")
    if some_field == 'some_value':
          self.fields['other_field'].required = False
    return cleaned_data

但它不起作用

Answer 1

请参阅 Cleaning and validating fields that depend on each other 上的 Django 文档.标准做法是执行以下处理:

def clean(self):
    cleaned_data = self.cleaned_data
    some_field = cleaned_data.get("some_field")
    if some_field == 'some_value':
          # 'other_field' is conditionally required.
          if not cleaned_data['other_field']:
              raise forms.ValidationError("'Other_field' is required.")
    return cleaned_data