How to prevent adding the same item to the cart twice as a quantity increase?

[titolin10]

Hello, my friends.

I would like to know how to prevent buyers from adding the same item to the cart twice. Normally the buyer can click the button "add to cart" unlimited times and then the quantity will increase as well as the total amount to pay.

In my case, I sell items with variants of the same product but the person who wants to buy are not allowed to buy the item more than 1 time. instead, he can choose from the variants that available. It seems strange but to make it clear my items are not physical products but "Services" Each service has a variant of options but quantity definition can't be applied to selling services.

So how to prevent multiple "add to cart" and enable choosing or change variant?

Also, by mention services. what is your recommendation regarding using VM to sell virtual services?


Best Regards.

VM3.6.10
j3.9.16

[pinochico]

Normally the buyer can click the button "add to cart" unlimited times and then the quantity will increase as well as the total amount to pay.

No, it is no normally, it is as VM configuration

Can You try setup Maximum Purchase Quantity == 1?