Update check_user_exists to accept attributes and add doc

dal/ungleich_ldap.py

@@ -142,7 +142,8 @@ class LdapManager:
         conn.unbind()
         return return_val
 
-    def check_user_exists(self, uid, is_customer=True, search_filter=""):
+    def check_user_exists(self, uid, is_customer=True, search_filter="",
+                          attributes=None):
         """
         Check if the user with the given uid exists in the customer group.
 
@@ -152,7 +153,11 @@ class LdapManager:
         :param search_filter: str representing the filter condition to find
                             users. If its empty, the search finds the user with
                             the given uid.
-        :return: True if the user exists otherwise return False
+        :param attributes: list A list of str representing all the attributes
+                           to be obtained in the result entries
+        :return: tuple (bool, [ldap3.abstract.entry.Entry ..])
+                       A bool indicating if the user exists
+                       A list of all entries obtained in the search
         """
         conn = self.get_admin_conn()
         entries = []
@@ -160,7 +165,8 @@ class LdapManager:
             result = conn.search(
                 settings.LDAP_CUSTOMER_DN if is_customer else settings.LDAP_USERS_DN,
                 search_filter=search_filter if len(search_filter)> 0 else
-                '(uid={uid})'.format(uid=uid)
+                '(uid={uid})'.format(uid=uid),
+                attributes=attributes
             )
             entries = conn.entries
         finally: