django-parler does not honor validators attribute -- validation possible at all?

[mij]

Hello folks,

I applied validators=[myfun] to a TranslatedFields's field today. It looked like this:

def validate_commonmark(value: str) -> str:
    raise ValidationError("I don't like anything")

class MyModel(TranslatableModel):
    name = models.SlugField(primary_key=True)

    translations = TranslatedFields(
        description = models.TextField(validators=[validate_commonmark]),
    )

The validators field is ignored – i.e. calling MyModel(name='foo', description='bar').full_clean() is always accepted.

The only way I found to get validation to work was the following:

class MyModel(TranslatableModel):
    name = models.SlugField(primary_key=True)

    translations = TranslatedFields(
        description = models.TextField(),
    )

    def clean(self):
        self.description = validate_commonmark(self.description)

The downside of this obviously being that validation errors are no longer linked to the affected field. I was surprised to find no mention of this limitation in the documentation nor online.

I had no success locating the issue in the limited time I put into looking at parler's code -- my bad.

If there's any guidance into where the problem lies, and the solution isn't a major refact, I'm happy to look into it and contribute a PR.