✨ Feature: allow configs to turn off mongoose autoIndex feature

lib/mongoose-connection-configurer.js

@@ -5,18 +5,6 @@ var mongodbArbiterDiscover = require('mongodb-arbiter-discovery');
 var mongoDogStats = require('mongodb-datadog-stats');
 var shutdown = require('shutdown');
-var MONGO_CONNECTION_OPTIONS = {
-  server: {
-    keepAlive: 1,
-    auto_reconnect: true,
-    socketOptions: { keepAlive: 1, connectTimeoutMS: 60000 }
-  },
-  replset: {
-    keepAlive: 1,
-    auto_reconnect: true,
-    socketOptions: { keepAlive: 1, connectTimeoutMS: 60000 }
-  }
-};
 module.exports = function mongooseConnectionConfigurer(options) {
   var mongoose = options.mongoose;
@@ -35,10 +23,34 @@ module.exports = function mongooseConnectionConfigurer(options) {
   var mongoConnection = config.get("mongo:connection");
   var mongooseConnectionUrl = config.get("mongo:url");
+  var autoIndex;
+  if (config.get('mongo:noAutoIndex')) {
+    autoIndex = false;
+  } else {
+    autoIndex = true;
+  }
+
+  var mongooseConnectOptions = {
+    server: {
+      keepAlive: 1,
+      auto_reconnect: true,
+      socketOptions: { keepAlive: 1, connectTimeoutMS: 60000 }
+    },
+    replset: {
+      keepAlive: 1,
+      auto_reconnect: true,
+      socketOptions: { keepAlive: 1, connectTimeoutMS: 60000 }
+    },
+    config: {
+      autoIndex: autoIndex
+    }
+  };
+
+
   if (mongoConnection) {
     mongooseConnectionUrl = mongodbConnString.mongo(mongoConnection);
   }
-  mongoose.connect(mongooseConnectionUrl, MONGO_CONNECTION_OPTIONS);
+  mongoose.connect(mongooseConnectionUrl, mongooseConnectOptions);
   shutdown.addHandler('mongo', 1, function(callback) {
     mongoose.disconnect(callback);
@@ -90,7 +102,7 @@ module.exports = function mongooseConnectionConfigurer(options) {
       if(err) return die(err);
       mongoConnection.hosts = hosts;
-      mongoose.connect(mongodbConnString.mongo(mongoConnection), MONGO_CONNECTION_OPTIONS);
+      mongoose.connect(mongodbConnString.mongo(mongoConnection), mongooseConnectOptions);
     });
   }