Création des users d'un seul coup

elections/utils.py

@@ -322,13 +322,23 @@ def create_users(election, csv_file):
     """Crée les votant·e·s pour l'élection donnée, en remplissant les champs
     `username`, `election` et `full_name`.
     """
+    User = get_user_model()
+
     dialect = csv.Sniffer().sniff(csv_file.readline().decode("utf-8"))
     csv_file.seek(0)
     reader = csv.reader(io.StringIO(csv_file.read().decode("utf-8")), dialect)
-    for (username, full_name, email) in reader:
-        election.registered_voters.create(
-            username=f"{election.id}__{username}", email=email, full_name=full_name
+
+    users = [
+        User(
+            election=election,
+            username=f"{election.id}__{username}",
+            email=email,
+            full_name=full_name,
         )
+        for (username, full_name, email) in reader
+    ]
+
+    User.objects.bulk_create(users)
 
 
 def check_csv(csv_file):