Hi,
I have the following simplified models. Then I create a number of IP
addresses and interfaces, with not all IP addresses being related to
an interface.
class IPAddress(models.Model):
address = models.CharField(maxlength=15)
class Admin: pass
class Interface(models.Model):
name = models.CharField(maxlength=15)
ipaddress = models.ForeignKey(IPAddress)
class Admin: pass
Then when I try:
>>> IPAddress.objects.filter(interface__isnull=False)
I get a list of IPAddresses that have related interfaces.
Then if I try:
>>> IPAddress.objects.filter(interface__isnull=True)
I get an empty list when I expected to be getting the IP addresses
that are not related to any interfaces. Right?
Ultimately I'd like to do this:
class Interface(models.Model):
name = models.CharField(maxlength=15)
ipaddress = models.ForeignKey(IPAddress,
limit_choices_to={'interface__isnull':True})
class Admin: pass
so that the admin will only should "free" ip addresses not ones that
ae already used.
Is this a bug? Am I doing the wrong lookup?
regards
matthew
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