dont't fail on missing LDAP users

web/webapp/directory.py

@@ -25,6 +25,7 @@
 """An API to retrieve and set data in the Warsaw Hackerspce LDAP tree."""
 
 import ldap
+import logging
 
 from flask import g
 
@@ -77,6 +78,9 @@ def update_member_groups(c, changes):
         for op in changes[group]:
             for username in changes[group][op]:
                 if op == 'add':
+                    if get_member_fields(c, username, ['uid'])['uid'] is None:
+                        logging.warning('User %r missing from LDAP, ignoring...', username)
+                        continue
                     changed = True
                     target_members.add(username)
                 elif op == 'remove':