From 3507ac4a07efc66727a4c8478d46bce57d30ea88 Mon Sep 17 00:00:00 2001
From: Dane Springmeyer <dane@dbsgeo.com>
Date: Fri, 20 Apr 2012 14:40:17 -0700
Subject: [PATCH] ensure keys are strings before inserting into sqlite - closes
 #20

---
 lib/mbtiles.js | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/lib/mbtiles.js b/lib/mbtiles.js
index 66f99a1..054f052 100644
--- a/lib/mbtiles.js
+++ b/lib/mbtiles.js
@@ -549,7 +549,11 @@ MBTiles.prototype.putTile = function(z, x, y, data, callback) {
 
     // Tilelive may pass us a data.key. If not, generate an md5
     // from the image buffer data.
-    var id = data.key || crypto.createHash('md5').update(data).digest('hex');
+    var id;
+    if (data.key)
+        id = String(data.key);
+    else
+        id = crypto.createHash('md5').update(data).digest('hex');
     if (!this._tileCache[id]) {
         // This corresponds to the images table.
         this._tileCache[id] = data;