added support for mongo uri

@@ -6,12 +6,18 @@ var _ = require('underscore')
 
 exports = module.exports = function(logger, settings) {
 
-  var connection = mongoose.createConnection(
-    settings.mongo.host,
-    settings.mongo.dbname,
-    settings.mongo.port,
-    settings.mongo.opts
-  )
+  var connection
+
+  if (_.isString(settings.mongo.uri)) {
+    connection = mongoose.createConnection(settings.mongo.uri, settings.mongo.opts)
+  } else {
+    connection = mongoose.createConnection(
+      settings.mongo.host,
+      settings.mongo.dbname,
+      settings.mongo.port,
+      settings.mongo.opts
+    )
+  }
 
   connection.on('error', function(err) {
     logger.error('mongo connection error: %s', err.message || err)