simple dbhelper with Isar

lib/models/todo.dart

@@ -1,11 +1,18 @@
+import 'package:isar/isar.dart';
+
+part 'todo.g.dart';
+
+@collection
 class Todo {
+  final int id;
   final String title;
   final String description;
   final DateTime createdAt;
 
   Todo({
+    required this.id,
     required this.title,
-    required this.description,
-    required this.createdAt,
-  });
+    this.description = '',
+    DateTime? createdAt,
+  }) : createdAt = createdAt ?? DateTime.now();
 }