In our tests, I discovered an unexpected behavior where calling
`item.swf_assets << swf_asset` wasn't updating computed fields
correctly.
This isn't something we actually do in-app, I think the modeling system
happened to trigger the callbacks in a way that still worked fine?
But I think this is a good idea for reliability, since caching is such
a notoriously difficult thing to get right anyway! And it makes our
tests simpler and clearer.
Specifically, `compatible_body_ids` references `swf_assets`, which, I'm
kinda surprised, *doesn't* include the newly-added asset yet when the
`ParentSwfAssetRelationship.after_save` hook runs while calling
`item.swf_assets << swf_asset`. Reloading it fixes this!
Emi Matchu
39bed6b157