Yeah, the Nested Set model is cool but it does not use recursive postgresql queries under the hood: http://mikehillyer.com/articles/managing-hierarchical-data-i

Yeah, the Nested Set model is cool but it does not use recursive postgresql queries under the hood: http://mikehillyer.com/articles/managing-hierarchical-data-in-mysql/ http://mikehillyer.com/articles/managing-hierarchical-data-i...