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from django.core.validators import EMPTY_VALUES
from django.forms import Field
from django.forms.utils import ValidationError
from django.utils.translation import gettext_lazy as _
from netaddr import EUI, AddrFormatError
class MACAddressField(Field):
default_error_messages = {
"invalid": _("Enter a valid MAC Address."),
}
def clean(self, value):
"""
Validates that EUI() can be called on the input. Returns the result
of EUI(). Returns None for empty values.
"""
value = super().clean(value)
if value in EMPTY_VALUES:
return None
try:
value = EUI(str(value), version=48)
except (ValueError, TypeError, AddrFormatError):
raise ValidationError(self.error_messages["invalid"])
return value
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