diff --git a/ckanext/collection/utils/serialize/__init__.py b/ckanext/collection/utils/serialize/__init__.py
index 2faaaab..af6bb49 100644
--- a/ckanext/collection/utils/serialize/__init__.py
+++ b/ckanext/collection/utils/serialize/__init__.py
@@ -78,10 +78,10 @@ class Serializer(
 
     """
 
-    value_serializers: dict[
-        str, types.ValueSerializer
-    ] = internal.configurable_attribute(
-        default_factory=lambda self: {},
+    value_serializers: dict[str, types.ValueSerializer] = (
+        internal.configurable_attribute(
+            default_factory=lambda self: {},
+        )
     )
     row_dictizer: Callable[[Any], dict[str, Any]] = internal.configurable_attribute(
         basic_row_dictizer,
@@ -108,16 +108,11 @@ def serialize_value(self, value: Any, name: str, record: Any):
     def dictize_row(self, row: Any) -> dict[str, Any]:
         """Transform single data record into serializable dictionary."""
         result = self.row_dictizer(row)
-        if fields := self.attached.columns.names:
-            visible = self.attached.columns.visible
-        else:
-            fields = list(result)
-            visible = set(fields)
+        fields = self.attached.columns.names or list(result)
 
         return {
             field: self.serialize_value(result.get(field), field, row)
             for field in fields
-            if field in visible
         }