use custom event emitter to drop the table during sync instead of extending mode…

…l factory with eventemitter

lib/model-factory.js

@@ -18,7 +18,6 @@ var ModelFactory = module.exports = function(name, attributes, options) {
   this.__addOptionalClassMethods()
   this.__findAutoIncrementField()
 }
-Utils.addEventEmitter(ModelFactory)
 
 ModelFactory.prototype.__defineGetter__('QueryGenerator', function() {
   return this.modelManager.sequelize.connectorManager.getQueryGenerator()
@@ -28,21 +27,23 @@ ModelFactory.prototype.sync = function(options) {
   options = Utils.merge(options || {}, this.options)
 
   var self = this
-  var doQuery = function() {
-    self.__query(self.QueryGenerator.createTableQuery(self.tableName, self.attributes, options))
-      .on('success', function() { self.emit('success', self) })
-      .on('failure', function(err) { self.emit('failure', err) })
-  }
+  var eventEmitter = new Utils.CustomEventEmitter(function() {
+    var doQuery = function() {
+     self.__query(self.QueryGenerator.createTableQuery(self.tableName, self.attributes, options))
+      .on('success', function() { eventEmitter.emit('success', self) })
+      .on('failure', function(err) { eventEmitter.emit('failure', err) })
+    }
 
-  if(options.force) {
-    this.drop()
-      .on('success', function() { doQuery() })
-      .on('failure', function(err) { self.emit('failure', err) })
-  } else {
-    doQuery()
-  }
+    if(options.force) {
+      self.drop()
+        .on('success', function() { doQuery() })
+        .on('failure', function(err) { eventEmitter.emit('failure', err) })
+    } else {
+      doQuery()
+    }
+  })
 
-  return this
+  return eventEmitter.run()
 }
 
 ModelFactory.prototype.drop = function() {