How to display models.full_clean() ValidationError in django admin?

[ivory 954]

Copy from:

https://stackoverflow.com/questions/71231549/how-to-display-models-full-clean-validationerror-in-django-admin

Question:

https://docs.djangoproject.com/en/4.0/ref/models/instances/#validating-objects

from django.core.exceptions import ValidationError

    try: 

        article.full_clean()

    except ValidationError as e:

        # Do something based on the errors contained in e.message_dict. 

        # Display them to a user, or handle them programmatically. 

     pass

There tell us can Display them to a user, how to display errors in Admin?

When I do nothing:

• When Settings.py Debug = True, it always render a ValidationError at /admin/xxx/xxx/xxx/change/ page.
• When Settings.py Debug = False, it always render a HTTP 500 page.