locale must be allowed to be blank for the non-translated use case. if translation is active and this is empty, phpcr-odm will default to session locale if not set, which is good default behaviour

Author: dbu

Resources/config/validation.xml

@@ -21,7 +21,6 @@
         </property>
 
         <property name="locale">
-            <constraint name="NotBlank"/>
             <constraint name="Locale"/>
         </property>
     </class>