I'd like to vet this through the users here before submitting a bug report.
Per the tutorial, all of my models have a defined __unicode__(self) which
returns a string.
The code is below, but here's the scenario:
1. I add a 'Device' with associated 'Interface'.
2. I edit the 'Device', with the inline 'Interface', add another
'Interface', and save.
3. I edit the 'Device', with the inline 'Interfaces', select the checkbox
to delete the interface
I just added, and click save, which results in the interface actually being
deleted, but
the following error:
...
File "/hostdb/lib/python2.7/site-packages/django/utils/encoding.py" in
force_unicode
71. s = unicode(s)
Exception Type: TypeError at /admin/hostdb/device/MM89999/
Exception Value: coercing to Unicode: need string or buffer, NoneType found
The POST data shows:
...
interface_set-1-primary u'on'
interface_set-1-hostname u'foo.our.org'
interface_set-1-ip_address u'10.1.1.4'
interface_set-1-mac_address u'somestring'
interface_set-1-device u'MM89999'
...
interface_set-0-DELETE u'on'
interface_set-0-ip_address u'10.1.1.1'
interface_set-0-hostname u'test.our.org'
interface_set-0-device u'MM89999'
interface_set-0-mac_address u''
#------------------------------------------------------------------
# myapp/models.py
#------------------------------------------------------------------
class Interface(models.Model):
hostname = models.CharField('Hostname',
primary_key=True,
max_length=80)
ip_address = models.IPAddressField('IP Address',
unique=True)
mac_address = models.CharField('MAC Address',
max_length=40,
blank=True)
primary = models.BooleanField('Primary',
default=False)
# the following on_delete may not be the right thing to do
device = models.ForeignKey('Device',
null=True,
blank=True,
verbose_name='Associated device',
on_delete=models.DO_NOTHING)
def __unicode__(self):
return self.hostname
class Device(models.Model):
propertyno = models.CharField('Property Number',
max_length=10,
primary_key=True)
def primary_hostname(self):
for i in self.interface_set.all():
if i.primary:
return i.hostname
return 'UNKNOWN'
def __unicode__(self):
h = self.primary_hostname()
if h == 'UNKNOWN':
return self.propertyno
return h
#------------------------------------------------------------------
# myapp/admin.py
#------------------------------------------------------------------
from hostdb.models import Device, Interface
class InterfaceInline(admin.TabularInline):
model = Interface
extra = 0
class DeviceAdmin(admin.ModelAdmin):
inlines = [InterfaceInline]
admin.site.register(Device, DeviceAdmin)
admin.site.register(Interface)
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