Hi,
I have a model called ‘Building’, which uses a UUID as its primary key. Each Building instance is linked to a scheme via a foreign key, and I want the detail view URL to include both the scheme and building UUIDs. My URL pattern is defined as follows:

PYTHONCopied
urlpatterns += [path('scheme/uuid:pk1/building/uuid:pk2/', comp_view.BuildingDetailView.as_view(), name='building-detail'),]

Here is my model definition:

PYTHONCopied
class Building(models.Model):
    """Model representing a building instance of a specific scheme."""

    id = models.UUIDField(
        primary_key=True, default=uuid.uuid4, editable=False,
        help_text="Unique ID for the building instance",
    )

    scheme = models.ForeignKey(
        WaterScheme, on_delete=models.CASCADE,
        related_name='buildings'
    )

    building_type = models.ForeignKey(
        BuildingType, on_delete=models.RESTRICT,
    )

    name = models.CharField("Building name", max_length=128)

    updated_by = models.ForeignKey(
        settings.AUTH_USER_MODEL, related_name='buildings',
        on_delete=models.SET_NULL, blank=True, null=True
    )
    updated_on = models.DateTimeField(auto_now=True)

    def __str__(self) -> str:
        return f"{self.scheme.name.split(' ', 1)[0]} {self.name}"

    def get_absolute_url(self):
        return reverse('schemes:building-detail', kwargs={'pk1': scheme.id, 'pk2': scheme.id})

    class Meta:
        ordering = ['name', 'id',]

I’ve experimented with different variations of the kwargs in get_absolute_url, but when I use it in my template I get this error:

Invalid block tag on line 14: ‘building.get_aboslute_url’, expected ‘empty’ or ‘endfor’. Did you forget to register or load this tag?

My template is defined as follows:

DJANGOCopied
{% block content %}
<h3>Scheme buildings</h3>

<ul>
    {% for building in building_list %}
        <li>
            <a href="{% building.get_aboslute_url %}">{{ building.name }}</a>
            ({{ building.building_type }})
        </li>
    {% empty %}
        <li>No buildings have been added...</li>
    {% endfor %}
</ul>
{% endblock %}

Am I making an error by trying to pass two variables in get_absolute_url, or is the issue somewhere else? Any help would be much appreciated.