From dcb0edcbd8aadf46d9ba916618ecbdd4186d934f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Laura=20Kl=C3=BCnder?= <laura@codingcatgirl.de>
Date: Sat, 18 Nov 2017 23:30:10 +0100
Subject: [PATCH] fix missing columns

---
 src/c3nav/mapdata/render/data.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/c3nav/mapdata/render/data.py b/src/c3nav/mapdata/render/data.py
index c5775c03..b201d635 100644
--- a/src/c3nav/mapdata/render/data.py
+++ b/src/c3nav/mapdata/render/data.py
@@ -455,6 +455,9 @@ class LevelGeometries:
             subtract = []
             if space.outside:
                 subtract.append(buildings_geom)
+            columns = [c.geometry for c in space.columns.all()]
+            if columns:
+                subtract.extend(columns)
             if subtract:
                 space.geometry = space.geometry.difference(unary_union(subtract))