如果电子邮件存在，如何在 Django 模型中引发 ValidationError

Question

I am trying to raise ValidationError through validators.py or def clean(self) on an email field in the Django model to know if an email exists in the DB.

Below is a brief of my model:

class Profile(models.Model)
   ...
   email = models.EmailField()
   ...

   def __str__(self)
       return self.f_name

I know I can add unique=True to the model field to ensure that, or simply do a cleaned_data in forms, but the solution I want is that of validator.py or def clean(self) in models.py .

Answer 1

For future reference, if anyone comes across the same issue, all thanks to @dirkgroten, I was able to resolve the problem with clean() in my models.py :

def clean(self)
     if Profile.objects.filter(email=self.email).exclude(pk=self.pk).exists():
            raise ValidationError({'email': _('Email already exists.')})