Hi folks --

I'm having a problem with admin inlines on a particular model suddenly
not showing up, even though they were working previously.  Oddly,
they're working just fine on the exact same code in staging (granted,
on a somewhat different server setup) but not in production.

The only changes I've made between versions are to wrap any help text
for each model field in ugettext_lazy.

I've googled, and the only suggestion I've found is that the
__unicode__ methods of the models might be throwing errors -- I tested
them on the command line, on those specific objects, and everything
was fine.

Below are the (simplified) models and admins.  Since I can't reproduce
the problem in staging, can anyone suggest where to start in terms of
tracking down what's going wrong without disrupting production?

Thanks!
Nan


### models.py
class Zone(models.Model):
        name = models.CharField(max_length=100)
        ...

        def __unicode__(self):
                return self.name
        ...


class MyThing(models.Model):
        ticket = models.ForeignKey('Ticket', related_name='played_zones')
        zone = models.ForeignKey(Zone)
        ...

        objects = MyThingManager()

        def __unicode__(self):
                return u'%s / %s' % (self.ticket, self.zone)
        ...



class Ticket(models.Model):
        activation_code = models.CharField(max_length=64, unique=True,
help_text=_l('Max length 64 characters for a regular ticket; 30
characters for demo ticket.'))
        ...

        objects = TicketManager()

        def __unicode__(self):
                return self.activation_code
        ...


### admin.py
class MyThingInline(admin.TabularInline):
        model = MyThing
        extra = 0

class TicketAdmin(admin.ModelAdmin):
        inlines = [MyThingInline,]
        save_as = True
        ...

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