when we validate - just do it on the contained dataValues, and lets actually che…

…ck that we have a rawAttribute definition for each value we attempt to validate (seems that it is possible to set stuff into a doa instance even though the model does not know about a given property)

lib/dao-validator.js

@@ -35,9 +35,9 @@ var validateAttributes = function() {
   var errors = {}
 
   // for each field and value
-  Utils._.each(this.model.values, function(value, field) {
+  Utils._.each(this.model.dataValues, function(value, field) {
     var rawAttribute   = this.model.rawAttributes[field]
-      , hasAllowedNull = ((rawAttribute.allowNull === true) && ((value === null) || (value === undefined)))
+      , hasAllowedNull = ((rawAttribute === undefined || rawAttribute.allowNull === true) && ((value === null) || (value === undefined)))
 
     if (this.model.validators.hasOwnProperty(field) && !hasAllowedNull) {
       errors = Utils._.merge(errors, validateAttribute.call(this, value, field))