Some more test-configuration updates

Author: davenquinn

core/macrostrat/core/config.py

@@ -4,14 +4,13 @@
 
 from dotenv import load_dotenv
 from dynaconf import Dynaconf, Validator
+from macrostrat.app_frame.control_command import BackendType
+from macrostrat.utils import get_logger
 from pydantic import BaseModel
 from sqlalchemy.engine import make_url
 from sqlalchemy.engine.url import URL
 from toml import load as load_toml
 
-from macrostrat.app_frame.control_command import BackendType
-from macrostrat.utils import get_logger
-
 from .utils import find_macrostrat_config
 
 log = get_logger(__name__)
@@ -52,11 +51,18 @@ def all_environments(self):
 
 settings = MacrostratConfig()
 
+
+def convert_to_string(value):
+    if value is None:
+        return None
+    return str(value)
+
+
 settings.validators.register(
     # `must_exist` is causing huge problems
     Validator("COMPOSE_ROOT", cast=Path),
     Validator("env_files", cast=list[Path]),
-    Validator("pg_database", cast=str, default=None),
+    Validator("pg_database", cast=convert_to_string, default=None),
     # Backend information. We could potentially infer this from other environment variables
     Validator("backend", default="kubernetes", cast=BackendType),
 )