symfony2: how to use group_concat in QueryBuilder

Question

I am having nested-set (using Gedmo tree) entity called \"Location\". Entity \"Appartment\" has location_id and what I need to do it to map scalar value called eg \"path\" t

Answer 1

I had similar problem. GROUP_CONCAT does not allow using CASE-WHEN inside. This library fixed my issues, so maybe it will be helpful.