wc-variations-data

To sync WooCommerce product variations, create the variation with WC_Product_Variation, save it, then call wc_delete_product_transients and WC_Product_Variable::sync to refresh the parent product and invalidate stale pricing caches.

Stale variation pricing occurs when transients like wc_var_prices_<parent_id> are not invalidated after mutations. Clearing these transients and running WC_Product_Variable::sync forces the data layer to refresh inherited pricing and stock data.

Retrieve UI-ready WooCommerce variation data by calling get_available_variations on the parent variable product, which prepares formatted and validated variation attributes, pricing, and stock status for front-end display.

Writing WooCommerce variation data programmatically requires instantiating WC_Product_Variation, assigning the parent ID and attribute attributes, saving the object, and then executing parent syncing via WC_Product_Variable::sync to maintain data integrity.

Yes, updating WooCommerce variation stock requires parent product syncing. Programmatic writes must invalidate pricing transients using wc_delete_product_transients and trigger WC_Product_Variable::sync to ensure accurate stock inheritance across parent-child relationships.