The parent record is a Release record. The child record is a Build record. It is possible to associate builds with different releases and to remove builds from releases. For the first step, I want to allow the user to associate a build record (child) with a parent record from within the parent record.
From within the Release record, the user clicks a button to Add an Existing build. I want the user to be able to specific the build number, which is also the record ID of the build record. Then I want to associate that build record with this release record.
I believe it can be done with the API's but it has been years since I've done coding and the world has changed.