Laravel Version

12.20.0

PHP Version

8.4.1

Database Driver & Version

MongoDB 8.0.11

Description

The method Illuminate\Database\Eloquent\Model::offsetUnset is not clean up $this->classCastCache[$offset] it's not affect Laravel DB connection drivers from the box (but reprodused), but it's affected official Laravel MongoDB. When I'm using unset method method getDirty() every time returning attribute (which has class cast) which were unset because it's still in classCastCache .

Steps To Reproduce

Can be reproduced on standard Laravel Eloquient DB driver

1. Create Model
2. Add class cast on attribute
3. Prefetch this attribute value
4. unset this attribute
5. run (Model)->getAttributes()

Expected result: attribute which were unset must not be in result
Actual result: attribute again appeared in list

This behaviour is changed if change Illuminate\Database\Eloquent\Model::offsetUnset to:

unset($this->attributes[$offset], $this->relations[$offset], $this->attributeCastCache[$offset], $this->classCastCache[$offset]);

My opened issue in MongoDB repo: mongodb/laravel-mongodb#3431