This article only applies to the Variant Dependant Method of Bold Bundles. The Draft Orders Method does not have variant inventory to manually sync. Visit Discounting Methods & How-to Switch Methods in Bold Bundles for more information on how to switch.
While Bold Bundles is set to the Variant Dependant Method, hidden variants are created on each product that is added into an active bundle group. The hidden variants will not be seen visually on the product page. These hidden variants will only be seen on the cart page and checkout page when a bundle is either added into the cart from a product page or when each product that make up a bundle is added individually into the cart page.
When a bundle variant is created, as long as the parent variant has inventory, then the bundle variant will have infinite inventory, simply marked as N/A and will deduct inventory from the base variant when purchases are made:
When the base variant runs out of inventory, the Bundle variants will show as 0.
When the base variant gets more stock, the Sync Inventory button will have to be selected to set the variants inventory back to infinite. Using Sync Inventory will also set the bundle variants to 0 if the parent variant is already out of stock.
From the Bold Bundles admin, select Product Bundles. You will see the Sync Inventory button on this screen.
This button should be selected after you change a regular variant's stock level from 0 to a positive number or if it's already at 0 and isn't displaying as sold out. Because app variants need to be created as having an inventory of "N/A" due to a Shopify API limitation, it's a good practice to select this button whenever creating or editing a Bundle group, so the app's variants will have the appropriate inventory level.
It's also good to use the Sync Inventory button to avoid overselling on your store:
Bundles handles inventory within the limitations of the Shopify Framework. Because of this, there is the potential for an item to be oversold, but it will only happen once.
If only the base item is being purchased, inventory is being counted toward that variant inventory. Generally, if they are trying to buy more than what is available, the checkout page would state that there isn't enough inventory and will reduce the quantity of the product.
When eligible for special pricing, the customer is purchasing the bundle variant, the one where the inventory is N/A. Within Shopify, N/A means that the inventory is unlimited and not being tracked. Because that variant is technically in stock, Shopify's inventory validation doesn't kick in.
After the sale, the app does a little bit of magic, reducing the base variant inventory by the quantity purchased. Once the base variant has been reduced to zero, the bundle variant will switch from N/A to zero, making the product unavailable for purchase. So until this occurs the bundle variant is able to be purchased.
To better illustrate this, suppose a t-shirt has 3 in stock. When looking at the product within Shopify, it would look like this:
- shirt - 3 in stock
- shirt (wholesale) - N/A
If the first customer buys the shirt and nothing else, inventory is reduced as normal. The 3 now becomes 2.
The next customer logs into their wholesale tagged customer account and buys 2 of the shirt. What they are actually purchasing is 2 of the bundle variant (the N/A variant one). After the sale, the base variant is reduced by 2, down to zero. As the base variant is now zero, the bundle variant is automatically switched from N/A to zero until stock is re-added.
If instead of 2, the second customer purchases 3 shirts, the same process happens. Order proceeds through as they are purchasing the N/A variant that does not track inventory. After the sale, the base variant is reduced from 2 down to -1. The bundle variant is also switched from N/A to zero, preventing any further items from being purchased.
There are a couple workarounds. Something simple is showing the base inventory quantity on the product page, informing the customer how much is on hand. This doesn't prevent overselling, but the customer would know up-front what is available. Preventing overselling, even on bundle variants, could be done with some custom, theme-specific enhancements.