Set a limit to the quantity on the shopping cart page. So when a customer adds a quantity more that is allowed in the shopping cart a message is displayed that the item quantity exceeds the limit.
Jira Code:CL-484
Requirement
If a customer alters the quantity on the cart page, the maximum quantity will be checked and if the quantity entered is greater than that then a message will be displayed as you

Solution
- A field is added in the item record.The Quantity allowed in the cart is filled in the field QUANTITY ALLOWED IN CART
Then a suitelet is called in the item_list_navigable_macro.txt, Which is in the checkout bundle.In the suitelet the item id,Quantity of the item and item type is passed.Form the suitelet the quantity allowed in the cart field is fetched.