I listed items on a products collection. Added a button on the list. When click on the button, the item is added to another cart collection.
But couldn`t find a way to update the number of items on cart collection.
Buttons do have actions to create collection, but don`t have or very limited actions to update or delete items in the same collection.
I checked the Odering template for a solution. But they also used only create collection action. When you click on couple of times, you add the same product couple of times to the cart, and you see list of same products in the cart. Not the product and the amount of the product in a single line.
Hope I could make it clear, and find a solution:)