From 9f252dfac4c58374170bbe74e8c62c97f6ee2b9e Mon Sep 17 00:00:00 2001
From: Raul Ochoa <rochoaf@gmail.com>
Date: Thu, 9 Jul 2015 19:49:11 +0200
Subject: [PATCH] Improve named map config format for cache key

---
 lib/cartodb/models/mapconfig/named_map_provider.js | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/lib/cartodb/models/mapconfig/named_map_provider.js b/lib/cartodb/models/mapconfig/named_map_provider.js
index d8830dd4..f226e172 100644
--- a/lib/cartodb/models/mapconfig/named_map_provider.js
+++ b/lib/cartodb/models/mapconfig/named_map_provider.js
@@ -1,5 +1,6 @@
 var _ = require('underscore');
 var assert = require('assert');
+var crypto = require('crypto');
 var dot = require('dot');
 var step = require('step');
 var MapConfig = require('windshaft').model.MapConfig;
@@ -155,13 +156,20 @@ NamedMapMapConfigProvider.prototype.createKey = function(base) {
         owner: this.owner,
         templateName: this.templateName,
         authToken: this.authToken || '',
-        configHash: this.config && this.config.toString() || '',
+        configHash: configHash(this.config),
         layer: '',
         scale_factor: 1
     });
     return (base) ? baseKeyTpl(tplValues) : rendererKeyTpl(tplValues);
 };
 
+function configHash(config) {
+    if (!config) {
+        return '';
+    }
+    return crypto.createHash('md5').update(JSON.stringify(config)).digest('hex').substring(0,8);
+}
+
 NamedMapMapConfigProvider.prototype.setDBParams = function(cdbuser, params, callback) {
     var self = this;
     step(