Extract method to retrieve searchable attributes

src/Query.php

@@ -95,10 +95,7 @@ public function where(array|string $attribute, mixed $value = null): self
     {
         $wheres = is_string($attribute) ? [$attribute => $value] : $attribute;
 
-        $searchable = [
-            $this->model->getKeyName(),
-            ...$this->model->getSearchable(),
-        ];
+        $searchable = $this->getSearchableAttributes();
 
         foreach ($wheres as $key => $value) {
             if (! in_array($key, $searchable)) {
@@ -115,6 +112,17 @@ public function where(array|string $attribute, mixed $value = null): self
         return $this;
     }
 
+    /**
+     * Get the searchable attributes for the model.
+     */
+    protected function getSearchableAttributes(): array
+    {
+        return [
+            $this->model->getKeyName(),
+            ...$this->model->getSearchable(),
+        ];
+    }
+
     /**
      * Prepare a value for a where clause.
      */