stefankroes/ancestry — pull request #190 by ShunsukeAida (2014-05-10 12:08:27+00:00)
Title: Migrating from other plugins with a column named differently than 'parent_id'

That's the case with me, and I had to write a migration file to rename my column to parent_id. Since some gems offer an option to specify the name of a parent column, it's not always named as such. I think it's helpful if build_ancestry_from_parent_ids! can take options to handle cases like that.