Ignore errors in app.ready()

aleksis/apps/tezor/apps.py

 from django.apps import apps
+from django.db import OperationalError
 
 from aleksis.core.util.apps import AppConfig
 from aleksis.core.util.core_helpers import get_site_preferences
@@ -25,7 +26,11 @@ class DefaultConfig(AppConfig):
 
         for app_config in apps.app_configs.values():
             if hasattr(app_config, "get_payment_variants"):
-                variants = app_config.get_payment_variants()
+                try:
+                    variants = app_config.get_payment_variants()
+                except OperationalError:
+                    # Non-fatal, database is not yet ready
+                    continue
                 for name, config in variants.items():
                     if name not in settings.PAYMENT_VARIANTS:
                         settings.PAYMENT_VARIANTS[name] = config