[FIX] real fix in validation.py

Author: sawer-odoo

awesome_gallery/validation.py

@@ -8,20 +8,18 @@
 
 _logger = logging.getLogger(__name__)
 
-_gallery_validator = None
-
 
 @view_validation.validate('gallery')
 def schema_viewname(arch, **kwargs):
-   global _gallery_validator
+    if not hasattr(schema_viewname, "_gallery_validator"):
+        with misc.file_open(os.path.join('awesome_gallery', 'rng', 'gallery_view.rng')) as f:
+            schema_viewname._gallery_validator = etree.RelaxNG(etree.parse(f))
 
-   if _gallery_validator is None:
-      with misc.file_open(os.path.join('awesome_gallery', 'rng', 'gallery_view.rng')) as f:
-         _gallery_validator = etree.RelaxNG(etree.parse(f))
+    validator = schema_viewname._gallery_validator
 
-   if _gallery_validator.validate(arch):
-      return True
+    if validator.validate(arch):
+        return True
 
-   for error in _gallery_validator.error_log:
-      _logger.error(ustr(error))
-   return False
+    for error in validator.error_log:
+        _logger.error(ustr(error))
+    return False