Okay, the NamedObject table was a mistake. Let's use the existing registration system.

django_kepi/__init__.py

@@ -1,3 +1,5 @@
+from collections import Iterable
+
 __title__ = 'django_kepi'
 __version__ = '0.0.16'
 VERSION = __version__
@@ -31,13 +33,30 @@ ATSIGN_CONTEXT = [
             }
         ]
 
-
 object_type_registry = {
-        'Object': None,
         }
 
-def register_type(a_typename, a_typeclass):
-    object_type_registry[a_typename] = a_typeclass
+def register_type(atype, handler):
+    object_type_registry[atype] = handler
+
+def resolve(identifier, atype=None):
+
+    if atype is None:
+        atype = object_type_registry.keys()
+    elif not isinstance(atype, Iterable):
+        atype = [atype]
+
+    for t in atype:
+
+        if t not in object_type_registry:
+            continue
+
+        result = object_type_registry[t].find_activity(url=identifier)
+
+        if result is not None:
+            return result
+
+    return None
 
 class TombstoneException(Exception):
 

django_kepi/migrations/0010_auto_20180906_1657.py

@@ -0,0 +1,20 @@
+# Generated by Django 2.1 on 2018-09-06 16:57
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('django_kepi', '0009_namedobject'),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name='namedobject',
+            name='content_type',
+        ),
+        migrations.DeleteModel(
+            name='NamedObject',
+        ),
+    ]

django_kepi/models.py

@@ -373,48 +373,4 @@ class RequestingAccess(UserRelationship):
                 self.following.name,
                 )
 
-class UnexpiredNamedObjectsManager(models.Manager):
-    def get_queryset(self):
-        return super().get_queryset().exclude(
-                #expiry==datetime.datetime.now(),
-                )
 
-class NamedObject(models.Model):
-    """
-    This table maps URL identifiers to Django objects, using the
-    contenttypes mechanism. It also keeps track of the object's
-    ActivityObject type.
-
-    Any object we know about on a remote server must be listed
-    here. Objects on this server *may* be listed here; if they're not,
-    django_kepi.resolve() can also find them
-    through following the URL path.
-    """
-
-    url = models.URLField(
-            max_length=255,
-            primary_key=True,
-            )
-
-    activity_type = models.CharField(
-            max_length=255,
-            )
-
-    expiry = models.DateTimeField(default=None)
-
-    content_type = models.ForeignKey(ContentType, on_delete=models.CASCADE)
-    object_id = models.PositiveIntegerField()
-    content_object = GenericForeignKey('content_type', 'object_id')
-
-    objects = UnexpiredNamedObjectsManager()
-    all_objects = models.Manager()
-
-def resolve(identifier):
-
-    try:
-        result = NamedObject.objects.get(url=identifier)
-        return result
-    except NamedObject.DoesNotExist:
-        pass
-
-    return None

tests/tests_resolve.py

@@ -1,5 +1,5 @@
 from django.test import TestCase
-from django_kepi.models import resolve
+from django_kepi import resolve
 
 class ResolveTests(TestCase):
 

things_for_testing/models.py

@@ -51,6 +51,10 @@ class ThingUser(models.Model):
                 self.name,
                 )
 
+    @classmethod
+    def find_activity(self, url):
+        return None # XXX stub
+
 register_type('Person', ThingUser)
 
 class ThingArticle(models.Model):
@@ -86,5 +90,10 @@ class ThingArticle(models.Model):
     def activity_like(cls, type_name, actor, fobject):
         pass
 
+    @classmethod
+    def find_activity(self, url):
+        return None # XXX stub
+
+
 register_type('Article', ThingArticle)