Merge pull request #478 from urakozz/v5

update getRelationCountHash (support laravel 8.17+)

Author: lazychaser

src/BaseRelation.php

@@ -128,11 +128,12 @@ public function getRelationQuery(
     /**
      * Get a relationship join table hash.
      *
+     * @param  bool $incrementJoinCount
      * @return string
      */
-    public function getRelationCountHash()
+    public function getRelationCountHash($incrementJoinCount = true)
     {
-        return 'nested_set_'.self::$selfJoinCount++;
+        return 'nested_set_'.($incrementJoinCount ? static::$selfJoinCount++ : static::$selfJoinCount);
     }
 
     /**
@@ -208,4 +209,4 @@ protected function matchForModel(Model $model, EloquentCollection $results)
 
         return $result;
     }
-}
+}