Merge pull request #2329 from werk85/master

Fix for #2327

lib/associations/has-one.js

@@ -145,6 +145,7 @@ module.exports = (function() {
 
     instancePrototype[this.accessors.create] = function(values, options) {
       var instance = this;
+      values = values || {};
       options = options || {};
 
       values[association.identifier] = instance.get(association.sourceIdentifier);