The relations return null when using RequestCriteria in Repository

use Prettus\Repository\Eloquent\BaseRepository;
use Prettus\Repository\Criteria\RequestCriteria;

class PostRepository extends BaseRepository {

```
/**
* @var array
*/
protected $fieldSearchable = [
'name',
'email'
];

public function boot(){
$this->pushCriteria(app('Prettus\Repository\Criteria\RequestCriteria'));
...
}

function model(){
return "App\\Post";
}
```

}