Are there any actions I can hook into for update_post_meta()? I don't see anything obvious in the source. Woocommerce lets you change the featured status of items via ajax from the edit screen. I am using a transient to store the featured items in lieu of querying them every time and I'm deleting that transient on the save_post hook, but it isn't getting fired because of the ajax function that directly updates the post meta. Worst case I can unhook woo's action and recreate it myself with the delete transient call, but I'm wondering if there is another hook i could use.
This function is here. And there are plenty of hooks/filters:
(In example of 'post',
Before metadata is updated:
-If this returns anything other than 'null', the metadata won't save
After metadata is updated:
-For posts only
All the actions take