From 3078923ea6dcd973fb9d2a19303d477d26542300 Mon Sep 17 00:00:00 2001
From: Dennis Elsinga <personal.elsinga@gmail.com>
Date: Sat, 23 Sep 2023 15:20:27 +0200
Subject: [PATCH] Fixed a bug where `defaultOpenLevel` had to be set

---
 README.md          | 2 ++
 src/SelectTree.php | 2 +-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index da263c6..d3b52f7 100644
--- a/README.md
+++ b/README.md
@@ -29,6 +29,8 @@ php artisan filament:assets
 ## Usage
 
 ```PHP
+use CodeWithDennis\FilamentSelectTree\SelectTree;
+
 // Create a tree based on a 'BelongsToMany' relationship
 SelectTree::make('categories')
     ->relationship('categories', 'name', 'parent_id', function ($query) {
diff --git a/src/SelectTree.php b/src/SelectTree.php
index bf1623e..31907b3 100644
--- a/src/SelectTree.php
+++ b/src/SelectTree.php
@@ -45,7 +45,7 @@ class SelectTree extends Field
 
     protected ?Closure $modifyQueryUsing;
 
-    protected Closure|int $defaultOpenLevel;
+    protected Closure|int $defaultOpenLevel = 0;
 
     protected string $direction = 'auto';