Create initial user command

server/docker/entrypoint-db-setup

@@ -69,8 +69,7 @@ if [[ -f /run/secrets/os_user ]]; then
     # first_name, last_name, username, password, groups_id
     # email is optional
     # userid forces to to only create a user with this id, if it not exists before.
-    python manage.py createopenslidesuser \
-      --userid 2 \
+    python manage.py createinitialuser \
       --email "${OPENSLIDES_USER_EMAIL:-}" \
       "${OPENSLIDES_USER_FIRSTNAME}" \
       "${OPENSLIDES_USER_LASTNAME}" \

server/openslides/users/management/commands/createinitialuser.py

@@ -0,0 +1,36 @@
+from django.core.management.base import BaseCommand
+from django.db import connection
+
+from .createopenslidesuser import Command as CreateOpenslidesUser
+
+
+class Command(BaseCommand):
+    """
+    Command to create an OpenSlides user.
+    """
+
+    help = "Creates an OpenSlides user with id=2 if no other user than the administrator were created before."
+
+    def add_arguments(self, parser):
+        parser.add_argument("first_name", help="The first name of the new user.")
+        parser.add_argument("last_name", help="The last name of the new user.")
+        parser.add_argument("username", help="The username of the new user.")
+        parser.add_argument("password", help="The password of the new user.")
+        parser.add_argument("groups_id", help="The group id of the new user.")
+        parser.add_argument("--email", help="The email address of the new user.")
+
+    def handle(self, *args, **options):
+        options["userid"] = 2
+
+        with connection.cursor() as cursor:
+            cursor.execute("SELECT last_value FROM users_user_id_seq;")
+            last_id = cursor.fetchone()[0]
+            if last_id > 1:
+                self.stdout.write(
+                    self.style.NOTICE(
+                        "There have users been created before. Do nothing."
+                    )
+                )
+                return
+
+        CreateOpenslidesUser().handle(**options)

server/openslides/users/management/commands/createopenslidesuser.py

@@ -1,6 +1,7 @@
 from django.core.management.base import BaseCommand
 
 from openslides.utils.autoupdate import inform_changed_data
+from openslides.utils.postgres import restart_id_sequence
 
 from ...models import User
 
@@ -38,22 +39,29 @@ class Command(BaseCommand):
             "default_password": options["password"],
             "email": options["email"] or "",
         }
-        if userid is None or not User.objects.filter(pk=userid).exists():
+        username = options["username"]
+        if (
+            userid is None or not User.objects.filter(pk=userid).exists()
+        ) and not User.objects.filter(username=username).exists():
             if userid is not None:
                 user_data["pk"] = userid
 
             user = User.objects.create_user(
-                options["username"],
+                username,
                 options["password"],
                 **user_data,
             )
             if options["groups_id"].isdigit():
                 user.groups.add(int(options["groups_id"]))
                 inform_changed_data(user)
-            self.stdout.write(
-                self.style.SUCCESS(f"Created user {options['username']}.")
-            )
+
+            if userid is not None:
+                restart_id_sequence("users_user")
+
+            self.stdout.write(self.style.SUCCESS(f"Created user {username}."))
         else:
             self.stdout.write(
-                self.style.NOTICE(f"A user with id {userid} already exists.")
+                self.style.NOTICE(
+                    f"A user with id {userid} or username {username} already exists."
+                )
             )