为什么不在 Form 中定义 name 字段，并覆盖save方法以将其保存到模型字段中，如下所示：

Why don't you define the name field in Form and override the save method to save to the model fields like this:

class SomeForm(forms.ModelForm):
    name = forms.CharField(max_length=255, required=True)

    class Meta:
        model = YourModel
        fields = ['name', 'and_other_fields']

    def save(self, commit=True)
        instance = super(SomeForm, self).save(commit=False)
        _name = self.cleaned_data.get('first_name').split(' ')
        instance.first_name = _name[0]
        instance.last_name = ' '.join(_name[1:])
        instance.save()
        return instance