Dynamic CustomValidator (With arguments)

[LHBL2003]

Known document::
https://netboxlabs.com/docs/netbox/en/stable/customization/custom-validation/
https://youtu.be/DjwXaLXL3Z8?si=3LcIHNKmzd_EdibJ

Even if the following example works with “Validation Types” = “required”, I would like to know how to pass parameters / arguments.

---

The following example checks whether the vrf parameter is not empty for an ipam prefix.

However, I would like to transfer the value VRF via Configuration.py. So that I can also pass the value Tenent etc. Something like this: FieldNotEmpty(“vrf”)
Everything I have tried has not worked. So how can I pass a value to the function?

/opt/netbox/validators/custom.py

# Dynamischer Validator
class FieldNotEmpty(CustomValidator):
    def validate(self, obj):
      
        # Holt den Wert des angegebenen Feldes
        field_value = getattr(obj, "vrf", None)

        # Wenn das Feld leer ist, Fehler auslösen
        if field_value is None:
            self.fail(f"Custom Validator: Das Feld darf nicht leer sein.", field="vrf")

/opt/netbox/netbox/netbox/configuration.py

from validators.custom import FieldNotEmpty

CUSTOM_VALIDATORS = {
    'ipam.prefix': (
        FieldNotEmpty(),
    ),
}