server_initialization: Add server_initialized function.

zerver/lib/server_initialization.py

@@ -7,6 +7,9 @@ from zerver.models import Realm, UserProfile, email_to_username, get_client, \
 
 from typing import Iterable, Optional, Tuple
 
+def server_initialized() -> bool:
+    return Realm.objects.count() > 0
+
 def create_internal_realm() -> None:
     realm = Realm.objects.create(string_id=settings.SYSTEM_BOT_REALM)
 

zerver/management/commands/initialize_voyager_db.py

@@ -4,8 +4,7 @@ from typing import Any
 from django.conf import settings
 from django.core.management.base import BaseCommand
 
-from zerver.lib.server_initialization import create_internal_realm
-from zerver.models import Realm
+from zerver.lib.server_initialization import create_internal_realm, server_initialized
 
 settings.TORNADO_SERVER = None
 
@@ -20,7 +19,7 @@ class Command(BaseCommand):
                             help='The number of extra users to create')
 
     def handle(self, *args: Any, **options: Any) -> None:
-        if Realm.objects.count() > 0:
+        if server_initialized():
             print("Database already initialized; doing nothing.")
             return
         create_internal_realm()