use Illuminate\Database\Eloquent\Attributes\CollectedBy;
 
#[CollectedBy(CustomCollection::class)]
class YourModel extends Model
{
    // Model implementation
}

// Product Collection
<?php
 
namespace App\Collections;
 
use Illuminate\Database\Eloquent\Collection;
 
class ProductCollection extends Collection
{
    public function inStock()
    {
        return $this->filter(fn($product) => $product->stock_count > 0);
    }
 
    public function onSale()
    {
        return $this->filter(fn($product) => $product->discount_percentage > 0);
    }
 
    public function byPriceRange($min, $max)
    {
        return $this->filter(function($product) use ($min, $max) {
            $price = $product->getEffectivePrice();
            return $price >= $min && $price <= $max;
        });
    }
 
    public function topRated()
    {
        return $this->filter(fn($product) => $product->average_rating >= 4)
            ->sortByDesc('average_rating');
    }
}
 
//Product model
namespace App\Models;
 
use App\Collections\ProductCollection;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Attributes\CollectedBy;
 
#[CollectedBy(ProductCollection::class)]
class Product extends Model
{
    public function getEffectivePrice()
    {
        if ($this->discount_percentage > 0) {
            return $this->price * (1 - $this->discount_percentage / 100);
        }
 
        return $this->price;
    }
}