LDAPObject: fixed a bug in python <-> ldap attributes conversion.

This should fix the CI.

CHANGES.rst

@@ -13,6 +13,7 @@ Fixed
   the LDAP schema update of 0.0.12
 - Fixed a bug happening during RP initiated logout on clients without
   `post_logout_redirect_uri` defined.
+- Gitlab CI fix. :pr:`64`
 
 Added
 *****

canaille/ldap_backend/ldapobject.py

@@ -170,7 +170,10 @@ class LDAPObject:
 
     @staticmethod
     def ldap_to_python(name, value):
+        try:
             syntax = LDAPObject.ldap_object_attributes()[name].syntax
+        except KeyError:
+            return value
 
         if syntax == "1.3.6.1.4.1.1466.115.121.1.24":  # Generalized Time
             value = value.decode("utf-8")
@@ -189,7 +192,10 @@ class LDAPObject:
 
     @staticmethod
     def python_to_ldap(name, value):
+        try:
             syntax = LDAPObject.ldap_object_attributes()[name].syntax
+        except KeyError:
+            return value
 
         if syntax == "1.3.6.1.4.1.1466.115.121.1.24":  # Generalized Time
             return value.strftime("%Y%m%d%H%M%SZ").encode("utf-8")