A foreign key on a model is not appearing in the Django admin site. This is irrespective of whether the field is explicitly specified in a ModelAdmin instance (fields = ('title', 'field-that-does-not-show-up')) or not.
I realize there are many variables that could be causing this behavior.
class AdvertiserAdmin(admin.ModelAdmin):
    search_fields = ['company_name', 'website']
    list_display = ['company_name', 'website', 'user']
class AdBaseAdmin(admin.ModelAdmin):
    list_display = ['title', 'url', 'advertiser', 'since', 'updated', 'enabled']
    list_filter = ['updated', 'enabled', 'since', 'updated', 'zone']
    search_fields = ['title', 'url']
The problem is the advertiser foreign key is not showing up in the admin for AdBase
class Advertiser(models.Model):
    """ A Model for our Advertiser
    """
    company_name = models.CharField(max_length=255)
    website = models.URLField(verify_exists=True)
    user = models.ForeignKey(User)
    def __unicode__(self):
        return "%s" % self.company_name
    def get_website_url(self):
        return "%s" % self.website
class AdBase(models.Model):
    """
    This is our base model, from which all ads will inherit.
    The manager methods for this model will determine which ads to
    display return etc.
    """
    title = models.CharField(max_length=255)
    url = models.URLField(verify_exists=True)
    enabled = models.BooleanField(default=False)
    since = models.DateTimeField(default=datetime.now)
    expires_on=models.DateTimeField(_('Expires on'), blank=True, null=True)
    updated = models.DateTimeField(editable=False)
    # Relations
    advertiser = models.ForeignKey(Advertiser)
    category = models.ForeignKey(AdCategory)
    zone = models.ForeignKey(AdZone)
    # Our Custom Manager
    objects = AdManager()
    def __unicode__(self):
        return "%s" % self.title
    @models.permalink
    def get_absolute_url(self):
        return ('adzone_ad_view', [self.id])
    def save(self, *args, **kwargs):
        self.updated = datetime.now()
        super(AdBase, self).save(*args, **kwargs)
    def impressions(self, start=None, end=None):
        if start is not None:
            start_q=models.Q(impression_date__gte=start)
        else:
            start_q=models.Q()
        if end is not None:
            end_q=models.Q(impression_date__lte=end)
        else:
            end_q=models.Q()
        return self.adimpression_set.filter(start_q & end_q).count()
    def clicks(self, start=None, end=None):
        if start is not None:
            start_q=models.Q(click_date__gte=start)
        else:
            start_q=models.Q()
        if end is not None:
            end_q=models.Q(click_date__lte=end)
        else:
            end_q=models.Q()
        return self.adclick_set.filter(start_q & end_q).count()
class BannerAd(AdBase):
    """ A standard banner Ad """
    content = models.ImageField(upload_to="adzone/bannerads/")
The mystery deepens. I just tried to create a ModelForm object for both AdBase and BannerAd, and both generated fields for the advertiser. Some crazy admin things going on here...
 
     
     
     
     
     
     
     
     
     
     
    