Quantity Increase / Decrease upon cart add

-- HikaShop version -- : 2.4.0
-- Joomla version -- : 3.4.1
-- PHP version -- : 5.3.13

How can I deduct from the product quantity immediately when any use add the items to the cart and then add the quantity back in case of empty the cart or cart expiry?

Hi,

This will require custom code, you can potentially create a plugin based on the function "onBeforeCartUpdate()" for that.
In this function, you will have the product ids of the added products and their quantity, so in this function you can change the product stock and save it thanks to the hikashop product class and the save() function.

Then, use the function "onBeforeOrderCreate()" in the same plugin to cancel the HikaShop product stock update, else for one product bought, the stock will be decremented twice.

It require good PHP knowledges, here is the documentation:
www.hikashop.com/support/support/documen...r-documentation.html

This behavior (not removing the item from stock) seems very strange to me. So strange that I am looking for confirmation that it is correct. Is the model that the item is not removed from stock until after checkout? That would make it possible for two different people to have the same item in their cart if there was only one. What happens at checkout in that scenario? Does the second buyer suddenly see that it is out of stock when they are checking out?

What happens when the item has multiple variants? Say that I sell t-shirts that come in multiple colors and sizes. I setup characteristics for Color and for Size. How do I setup the quantities for each characteristic? I assume that it is not possible to track small-yellow vs small-red or large-yellow, correct? If I sell a shirt that is size: small and color: yellow, will the system try to subtract from both the yellow variant and the small variant? Or will it not subtract at all, or only subtract from one or the other?

So I'm writing a plugin to adjust the inventory level when an item is added to the cart . As you suggested in the first response of this thread, I am using the onBeforeCartUpdate() function. I have most everything worked out, with one exception.When an item is deleted from the cart, I need to add it back into stock. Items can be deleted by changing the quantity or deleting the entire line. But in the onBeforeCartUpdate() function, I don't see any way to know what the previous quantity in the cart was. In other words if someone had five(5) of "item A" in their cart and then they edited it to three(3), the only number that I can access in onBeforeCartUpdate() is three(3). Since I don't know how many were in the cart previously, I can't know how many to return to stock. Any Ideas?

Hi, I may buy this plugin if you already did it.
I want to update the quantity on when the use just add the product to cart and keep it for certain time, like 5 minutes before releasing it back to stock.

Thank you.

did Bssimbg create the plugin or is this feature available now ?
if not it is a pity because othes market extensions do it

No dear, I didn't develop it and since long time I am not following on new features of Hikashop, so I don't know if they implemented it.