nabilhassen/larasense

use Illuminate\Contracts\Database\Eloquent\Builder;

class Material extends Model
{
    // ...

    public function scopeDisplayed(Builder $query): void
    {
        $query
            ->where("{$this->getTable()}.is_displayed", 1)
            ->whereHas('source', fn (Builder $q) => $q->displayed());
    }

    // ...
}