I have a store where I selle unique products, so every product has a quantity of 1. When the order is placed, the quantity is decreased to 0 and the product changes to out of stock and it's no longer available. This is correct.
My issue is that if the product is already in the cart of a user (the order is not placed yet, the user has only added the product into cart) it cannot be added to the cart by another user. So:
- user A adds product to the cart and does NOT proceed to place order
- user B tries to add the same product to the cart but magento doesn't let him because there is no quantity available
So my question is:
- is the quantity decreased when the order is placed or when the product is added to cart?
- is there a way to have the quantity available always, until one of the users finally places the order?