Laravel 8 - Issues with using Query Scopes for dynamic filtering in Eloquent
I'm building a feature where I'm writing unit tests and I'm working on a Laravel 8 application where I need to implement dynamic filtering using query scopes in Eloquent models. I've defined a scope in my `Product` model for filtering by price range. Here's the scope definition: ```php public function scopePriceRange($query, $min, $max) { return $query->whereBetween('price', [$min, $max]); } ``` I am trying to use this scope in my controller to retrieve products based on user input from a form, like this: ```php $minPrice = request('min_price'); $maxPrice = request('max_price'); $products = Product::priceRange($minPrice, $maxPrice)->get(); ``` However, I'm running into an issue where, when I pass in `null` for either `min_price` or `max_price`, the query returns an empty collection instead of all products in that case. The code looks like this: ```php $minPrice = request('min_price') ?: 0; $maxPrice = request('max_price') ?: PHP_INT_MAX; $products = Product::priceRange($minPrice, $maxPrice)->get(); ``` I've tried modifying the scope to handle null values directly by adjusting the query like so: ```php public function scopePriceRange($query, $min = null, $max = null) { if ($min !== null) { $query->where('price', '>=', $min); } if ($max !== null) { $query->where('price', '<=', $max); } return $query; } ``` But despite these changes, when I pass `null`, the filtering doesn't seem to work as expected, and I'm still not getting all products back. Instead, I just see an empty collection. I checked the database and confirmed there are products with various price values. Is there a better way to handle such dynamic filtering in query scopes? What should I change in my implementation to ensure it works correctly when one of the price boundaries is not provided? For context: I'm using Php on CentOS.