diff --git a/src/grung/db.py b/src/grung/db.py
index 00c7629..ddce634 100644
--- a/src/grung/db.py
+++ b/src/grung/db.py
@@ -52,8 +52,8 @@ class RecordTable(table.Table):
 
     def _check_unique(self, document) -> bool:
         matches = [
-            match
-            for match in self.search(
+            dict(match)
+            for match in super().search(
                 reduce(
                     ior,
                     [
diff --git a/src/grung/types.py b/src/grung/types.py
index cda5f6b..48a5004 100644
--- a/src/grung/types.py
+++ b/src/grung/types.py
@@ -140,7 +140,7 @@ class Pointer(Field):
     def reference(cls, value: Record | str):
         # XXX This could be smarter
         if isinstance(value, str):
-            if '::' not in value:
+            if "::" not in value:
                 raise PointerReferenceError("Value {value} does not look like a reference!")
             return value
         if value:
@@ -203,5 +203,3 @@ class Collection(Field):
             for backref in target._metadata.backrefs(type(record)):
                 target[backref.name] = record
                 db.save(target)
-
-