"""
Validators for validating object fields.
"""
from django.conf import settings
from django.core.validators import EmailValidator
import ipaddress
import netaddr
from . import exc
[docs]def validate_mac_address(value):
"""Validate whether ``value`` is a valid MAC address."""
if value is None:
return value
# If the incoming value is a string, cast it to an int
if isinstance(value, basestring) and value.isdigit():
value = int(value)
# Directly invoke EUI object instead of using MACAddressField
try:
value = netaddr.EUI(value, version=48)
except (ValueError, TypeError, netaddr.AddrFormatError):
raise exc.ValidationError({
'mac_address': 'Enter a valid MAC Address.'
})
return value
[docs]def validate_name(value):
"""Validate whether ``value`` is a valid name."""
if not value:
raise exc.ValidationError({
'name': 'This is a required field.'
})
return value
[docs]def validate_cidr(value):
"""Validate whether ``value`` is a validr IPv4/IPv6 CIDR."""
try:
cidr = ipaddress.ip_network(unicode(value))
except ValueError:
raise exc.ValidationError({
'cidr': '%r does not appear to be an IPv4 or IPv6 network' % value
})
else:
return cidr
[docs]def validate_host_address(value):
"""Validate whether ``value`` is a host IP address."""
cidr = validate_cidr(value)
if cidr.prefixlen not in settings.HOST_PREFIXES:
raise exc.ValidationError({
'address': '%r is not a valid host address!' % value
})
return value
[docs]def validate_email(value):
"""Validate whether ``value`` is an email address."""
validator = EmailValidator()
try:
validator(value)
except exc.DjangoValidationError as err:
raise exc.ValidationError({
'email': err.message
})
return value