Here's what I came up with, in case someone else finds this useful.
I'm quite proud, actually.
from django.core.management.base import BaseCommand, CommandError
from hostdb.models import Device, Interface
def sanitized_value(v):
if v == None:
return ""
return v
class Command(BaseCommand):
args = '<hostname1 hostname2...>'
help = 'Display host information for the specified host(s)'
def handle(self, *args, **options):
for hostname in args:
if hostname.find('.mitre.org') == -1:
hostname = hostname + '.mitre.org'
try:
dev = Interface.objects.get(fqdn=hostname).device
except Device.DoesNotExist:
raise CommandError('Host "%s" does not exist' % hostname)
# pk, the object defining the primary key of our model
pk = Device._meta.pk
# We turn this on because we know in our case our pk is "id"
# which is pointless to print out in this context
skip_pk = True
# Iterate over all field objects (ManyToMany are not included
# in this for some reason), in the order they are defined
# in the model (thankfully!).
for field in Device._meta.fields:
if (field == pk) and skip_pk: continue
vname = field.verbose_name
val = sanitized_value(field.value_from_object(dev))
self.stdout.write("%s: %s\n" % (vname, val))
# Now handle the ManyToMany fields
for field in dev._meta.many_to_many:
m2m_manager = getattr(dev, field.name)
vname = field.verbose_name
l = []
# Using ','.join(m2m_manager.all()) doesn't work because
# ManyRelatedManager objects are not iterable. We have to do
this.
for t in m2m_manager.all():
l.append(str(t))
val = ','.join(l)
self.stdout.write("%s: %s\n" % (vname, val))
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