Laravel Version

12.8.1

PHP Version

8.4

Database Driver & Version

No response

Description

Today we implemented new feature Model::automaticallyEagerLoadRelationships(); into AppServiceProvider boot method. When we try to store Model instance into redis, the exception Serialization of 'Closure' is not allowed is thrown.

If I remove automaticallyEagerLoadRelationships from AppServiceProvider, everything works fine.

After quick check, the problem should be in file src/Illuminate/Database/Eloquent/Concerns/HasRelationships.php because the property $relationAutoloadCallback can contain closure, which cannot be serialized.

Steps To Reproduce

1. Add into boot method in AppService provider Model::automaticallyEagerLoadRelationships();
2. Retrieve data from database into Model, for example: $data = Language::query()->firstWhere('language', $language);
3. Try to save it into redis via Cache::put($cacheKey, $data, Carbon::now()->addDay());
4. Exception Serialization of 'Closure' is not allowed. is thrown