Object.type and object_ids fixes to handle missing as1

fixes https://console.cloud.google.com/errors/detail/CJ-U7Zq_s4bxgwE;time=P30D?project=bridgy-federated

models.py

@@ -301,10 +301,12 @@ class Object(StringIdModel):
 
     @ndb.ComputedProperty
     def type(self):  # AS1 objectType, or verb if it's an activity
-        return as1.object_type(self.as1)
+        if self.as1:
+            return as1.object_type(self.as1)
 
     def _object_ids(self):  # id(s) of inner objects
-        return as1.get_ids(self.as1, 'object')
+        if self.as1:
+            return as1.get_ids(self.as1, 'object')
     object_ids = ndb.ComputedProperty(_object_ids, repeated=True)
 
     deleted = ndb.BooleanProperty()

tests/test_models.py

@@ -294,6 +294,9 @@ class ObjectTest(testutil.TestCase):
         self.assertNotIn(common.get_object.cache_key('x#y'), common.get_object.cache)
         self.assertNotIn(common.get_object.cache_key('x'), common.get_object.cache)
 
+    def test_computed_properties_without_as1(self):
+        Object(id='a').put()
+
 
 class FollowerTest(testutil.TestCase):