带有 Laravel 和 Spatie 查询生成器的愿望清单系统

Question

I need to create a wishlist with laravel, I already use spatie/query-builder to get products. At this time everything works fine and I can retrieve products already added to wishlist. I need help for reverse the process.

Three tables are used:

• users
• products
• products_favorites (pivot table) with user_id and product_id

If record exists in pivot table product is in wishlist

So with this custom query builder filter:

return $query->join('product_favorites', function ($query) {
    $query->on('product_favorites.product_id', '=', 'products.id');
})->where('product_favorites.user_id', '=', Auth::id());

I can get products who are in current user wishlist. I want to reverse the process. Get all products who aren't in product_favorites table.

How do you think I can achieve this?

Thank's for your help

Answer 1

I'm not sure but this on seems to work:

return $query->leftJoin('product_favorites', function ($query) {
    $query->on('product_favorites.product_id', '=', 'products.id');
})->where('product_favorites.user_id', '=', null);