added; support for disabled auto-indexing

closes #984

lib/model.js

@@ -682,7 +682,9 @@ for (var i in EventEmitter.prototype)
  */
 
 Model.init = function init () {
-  this.ensureIndexes()
+  if (this.schema.options.autoIndex)
+    this.ensureIndexes();
+
   this.schema.emit('init', this);
 };
 
@@ -698,7 +700,9 @@ Model.init = function init () {
 
 Model.ensureIndexes = function ensureIndexes (cb) {
   var indexes = this.schema.indexes();
-  if (!indexes.length) return cb && cb();
+  if (!indexes.length) {
+    return cb && cb();
+  }
 
   var self = this
     , safe = self.schema.options.safe

lib/schema.js

@@ -39,6 +39,7 @@ function Schema (obj, options) {
     , capped: false // { size, max, autoIndexId }
     , versionKey: '__v'
     , minimize: true
+    , autoIndex: true
   }, options);
 
   // build paths

test/model.indexes.test.js

@@ -152,6 +152,27 @@ describe('model', function(){
       });
     });
 
+    describe('auto creation', function(){
+      it('can be disabled', function(done){
+        var db = start();
+        var schema = new Schema({ name: { type: String, index: true }})
+        schema.set('autoIndex', false);
+
+        var Test = db.model('AutoIndexing', schema, "x"+random());
+        Test.on('index', function(err){
+          assert.ok(false, 'Model.ensureIndexes() was called');
+        });
+
+        setTimeout(function () {
+          Test.collection.getIndexes(function(err, indexes){
+            assert.ifError(err);
+            assert.equal(0, Object.keys(indexes).length);
+            done();
+          });
+        }, 100);
+      })
+    })
+
     it('can be manually triggered', function(done){
       var db = start();
       var schema = new Schema({ name: { type: String } })