Laravel 8 how to implement whereNot - eloquent

Question

In Laravel 9 you have a new method called whereNot but not in Laravel 8. I cannot upgrade to Laravel 9 right now so I am looking for an alternative solution.
The goal is to exclude products that both have zero in stock and stock_date older than one month. The trick is both conditions should be considered or they are disregarded. So a product can have zero stock and less than one month old and still be part of the result.
Here is how I would probably do it in Laravel 9:
$query = Product::select('id')
->where('status', 1)
->where('type', 1)
->whereNot(function ($q) {
$q->where('stock', 0)
->where('stock_date', '<', Carbon::now()->subMonths(1));
});
I would probably write this in pure MySQL:
# The assumption is that the current date is: 2022-10-31
SELECT
id
FROM
products
WHERE
status = 1
AND type = 1
AND NOT (stock = 0 AND stock_date < '2022-09-31')

Answer 1

Well, if you cannot use new features, which is understandable, then you should invert your query like so:
$query = Product::select('id')
->where('status', 1)
->where('type', 1)
->where(function ($q) {
$q->where('stock', '<>', 0)
->where('stock_date', '>=', Carbon::now()->subMonths(1));
})
->get();