From 6cff5dd78e17be3d18b4187f426a516f2d371bf6 Mon Sep 17 00:00:00 2001
From: vamonte <valentin.monte@yahoo.fr>
Date: Thu, 3 Dec 2015 23:41:25 +0100
Subject: [PATCH] Fix the ability to use a function for the  option.

The lookup function worked only for the first time.
---
 index.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/index.js b/index.js
index a613cfa..ab8675b 100644
--- a/index.js
+++ b/index.js
@@ -49,8 +49,9 @@ module.exports = function (app, db) {
       })
     }
     if (typeof(opts.lookup) === 'function') {
+      var callableLookup = opts.lookup;
       middleware = function (middleware, req, res, next) {
-        return opts.lookup(req, res, opts, function () {
+        return callableLookup(req, res, opts, function () {
           return middleware(req, res, next)
         })
       }.bind(this, middleware)