diff --git a/example/lib/task.dart b/example/lib/task.dart
index c66741a2..b6042a1c 100644
--- a/example/lib/task.dart
+++ b/example/lib/task.dart
@@ -57,7 +57,11 @@ class Task {
         id,
         isRead ?? false,
         message ?? 'empty',
-        timestamp!,
+        timestamp ??
+            Timestamp(
+              createdAt: DateTime.now(),
+              updatedAt: DateTime.now(),
+            ),
         status,
         type,
       );
diff --git a/example/lib/timestamp.dart b/example/lib/timestamp.dart
index 8428e419..5b568c6f 100644
--- a/example/lib/timestamp.dart
+++ b/example/lib/timestamp.dart
@@ -14,10 +14,10 @@ class Timestamp {
   @override
   bool operator ==(Object other) =>
       identical(this, other) ||
-          other is Timestamp &&
-              runtimeType == other.runtimeType &&
-              createdAt == other.createdAt &&
-              updatedAt == other.updatedAt;
+      other is Timestamp &&
+          runtimeType == other.runtimeType &&
+          createdAt == other.createdAt &&
+          updatedAt == other.updatedAt;
 
   @override
   int get hashCode => createdAt.hashCode ^ updatedAt.hashCode;
@@ -27,6 +27,6 @@ class Timestamp {
     final DateFormat formatter = DateFormat('yyyy-MM-dd');
     final String formattedCreatedAt = formatter.format(createdAt);
     final String formattedUpdatedAt = formatter.format(updatedAt);
-    return 'Timestamp{createdAt: $formattedCreatedAt, updatedAt: $formattedUpdatedAt}';
+    return 'createdAt: $formattedCreatedAt \n updatedAt: $formattedUpdatedAt';
   }
 }
diff --git a/floor_generator/lib/processor/queryable_processor.dart b/floor_generator/lib/processor/queryable_processor.dart
index 0faf23a7..b498bb30 100644
--- a/floor_generator/lib/processor/queryable_processor.dart
+++ b/floor_generator/lib/processor/queryable_processor.dart
@@ -14,6 +14,7 @@ import 'package:floor_generator/value_object/field.dart';
 import 'package:floor_generator/value_object/queryable.dart';
 import 'package:floor_generator/value_object/type_converter.dart';
 import 'package:meta/meta.dart';
+import 'package:source_gen/source_gen.dart';
 
 import '../value_object/embed.dart';
 
@@ -90,13 +91,26 @@ abstract class QueryableProcessor<T extends Queryable> extends Processor<T> {
     final String prefix = '',
   }) {
     final parameterName = parameterElement.displayName;
-    final field = fields.firstWhereOrNull(
-        (field) => field.fieldElement.displayName == parameterName);
+    final field =
+        fields.firstWhereOrNull((field) => field.name == parameterName);
     if (field != null) {
       final databaseValue = "row['$prefix${field.columnName}']";
 
       String parameterValue;
-      if (parameterElement.type.isDefaultSqlType ||
+
+      final typeConverter = [...queryableTypeConverters, field.typeConverter]
+          .whereNotNull()
+          .getClosestOrNull(parameterElement.type);
+
+      if (typeConverter != null) {
+        final castedDatabaseValue = databaseValue.cast(
+          typeConverter.databaseType,
+          parameterElement,
+        );
+
+        parameterValue =
+            '_${typeConverter.name.decapitalize()}.decode($castedDatabaseValue)';
+      } else if (parameterElement.type.isDefaultSqlType ||
           parameterElement.type.isEnumType) {
         parameterValue = databaseValue.cast(
           parameterElement.type,
@@ -108,18 +122,11 @@ abstract class QueryableProcessor<T extends Queryable> extends Processor<T> {
             field.embedConverter!.classElement, field.embedConverter!.fields,
             prefix: '$prefix$embedVar');
       } else {
-        final typeConverter = [
-          ...queryableTypeConverters,
-          field.typeConverter,
-        ].whereNotNull().getClosest(parameterElement.type);
-
-        final castedDatabaseValue = databaseValue.cast(
-          typeConverter.databaseType,
-          parameterElement,
+        throw InvalidGenerationSourceError(
+          'Column type is not supported for ${parameterElement.type}',
+          todo:
+              'Either use a supported type https://pinchbv.github.io/floor/entities/#supported-types or supply a type converter.',
         );
-
-        parameterValue =
-            '_${typeConverter.name.decapitalize()}.decode($castedDatabaseValue)';
       }
 
       if (parameterElement.isNamed) {