Allows user to pass an object to extendsTo.setAccessor instead of an instance (detected via #250)

Author: dresende

lib/Associations/Extend.js

@@ -108,6 +108,10 @@ function extendInstance(Model, Instance, Driver, association, opts) {
 
 					var fields = Object.keys(association.field);
 
+					if (!Extension.isInstance) {
+						Extension = new association.model(Extension);
+					}
+
 					for (var i = 0; i < Model.id.length; i++) {
 						Extension[fields[i]] = Instance[Model.id[i]];
 					}

lib/Instance.js

@@ -123,6 +123,7 @@ function Instance(Model, opts) {
 	};
 	var afterSave = function (cb, create, err) {
 		emitEvent("save", err, instance);
+
 		if (create) {
 			Hook.trigger(instance, opts.hooks.afterCreate, !err);
 		}