python-3.x - Django 表单验证检查不起作用

Question

我在我的 Django 表单中给出了这个验证规则，所以当该字段为空时，它会出现验证错误，但验证时间到了，我的意思是什么时候没有或没有我每次都收到验证错误，我如何解决这个问题。模型.py

class Check(models.Model):
  use_for_car = models.BooleanField(default=False)

表格.py

class CheckForm(forms.ModelForm):
    translated_names = TranslationField()

    def clean(self):
        cleaned_data = super(CheckForm, self).clean()
        use_for_car = self.cleaned_data.get("use_for_car")
        
        if use_for_car is None:  
            raise ValidationError("Use For Car NEED TO BE FILLED ")
        return use_for_registrations

    class Meta:
        fields = "__all__"
        model = models.Check

Answer 1

情况已经如此，因为您没有指定 blank=True ^[Django-doc] ，这意味着表单字段是必需的，所以这意味着对于表单字段，required=True ^[Django-doc] , 而对于 BooleanField form field ^[Django-doc] ，这意味着:

Since all Field subclasses have required=True by default, the validation condition here is important. If you want to include a boolean in your form that can be either True or False (e.g. a checked or unchecked checkbox), you must remember to pass in required=False when creating the BooleanField.

因此您可以简单地让 Django 完成工作:

class CheckForm(forms.ModelForm):
    translated_names = TranslationField()

    # no clean override

    class Meta:
        model = models.Check
        fields = '__all__'