Accessory Lock prevents customers from purchasing accessory products without having the required main product in their cart. Validation is fully server-side and cannot be bypassed via JavaScript or browser manipulation.
What the plugin does
Some products only make sense when the matching main product is also purchased — for example, a camera strap without a camera, or a charging cable without the compatible device. The plugin lets you configure these dependencies directly in the Shopware Admin and automatically enforces them at checkout.
Key features:
Cart validation: Accessories cannot be ordered without a matching main product in the cart. The error message names the missing product by name.
Admin UI: Every product detail page gets a dedicated "Accessory Lock" tab where you can assign and review dependencies.
Storefront hints: Customers are guided on accessory product pages by a "Buy Together" widget. Main product pages automatically display a compatible accessories section.
Variant inheritance: Configure the lock once on the parent product — all variants inherit the setting automatically.
n:n relationships: An accessory can accept multiple main products (any one of them in the cart is sufficient).
Storefront views
"Compatible accessories" section on the main product page
On a main product's detail page, a section with all compatible accessories is automatically displayed below the product description. Customers can add both products to the cart together with a single click.
Compatible accessories section on the main product page
"Buy Together" widget on the accessory product page
On an accessory product's detail page, a widget replaces the standard purchase area. It lists all compatible main products as selectable options. Once a main product is already in the cart, the widget switches to an adapted view — showing the in-cart product as such and revealing the standard buy button.
Buy Together widget on the accessory product page
Technical details
Compatible with Shopware ~6.6.0
Requires PHP 8.2+
No external services or API connections required
Server-side validation via CartValidatorInterface
Variant inheritance via Shopware's native DAL inheritance mechanism
