From 1d7cf4c2476cfb1d6be767ed24f5f7f38380a6d0 Mon Sep 17 00:00:00 2001
From: Tom Russell <tomalrussell@gmail.com>
Date: Thu, 25 Oct 2018 22:23:54 +0100
Subject: [PATCH] Use revision id in data-layer tile request

---
 app/src/frontend/map.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/app/src/frontend/map.js b/app/src/frontend/map.js
index d686f633..a1fb294e 100644
--- a/app/src/frontend/map.js
+++ b/app/src/frontend/map.js
@@ -80,8 +80,10 @@ class ColouringMap extends Component {
             like: 'likes',
         }
         const data_tileset = tileset_by_cat[cat];
+        // pick revision id to bust browser cache
+        const rev = this.props.building? this.props.building.revision_id : '';
         const dataLayer = data_tileset?
-            <TileLayer key={data_tileset} url={`/tiles/${data_tileset}/{z}/{x}/{y}.png`} />
+            <TileLayer key={data_tileset} url={`/tiles/${data_tileset}/{z}/{x}/{y}.png?rev=${rev}`} />
             : null;
 
         // highlight