06/01 Fix teller response log

app/__init__.py

@@ -6,6 +6,42 @@ from app.extensions import db, login_manager, migrate, csrf
 from app.utils.formatters import format_currency, format_percent, format_large_number
 
 
+def _setup_logging(app):
+    """
+    Ensure app.* module loggers emit at INFO level.
+
+    Under Gunicorn the root logger already has handlers (pointing to Gunicorn's
+    error log / stderr) but its level is WARNING, so INFO records are dropped
+    before they reach any handler.  We fix that by:
+      1. Reusing Gunicorn's handlers on the 'app' namespace logger so records
+         go to the same destination as Gunicorn's own logs.
+      2. Falling back to a plain stderr StreamHandler in dev / direct-run mode.
+    """
+    import sys
+
+    app_log = logging.getLogger('app')
+    app_log.setLevel(logging.INFO)
+
+    if app_log.handlers:
+        return  # already configured (e.g. running tests)
+
+    gunicorn_handlers = logging.getLogger('gunicorn.error').handlers
+    if gunicorn_handlers:
+        # Running under Gunicorn — attach its handlers so our logs land in the
+        # same error log file that Gunicorn writes to.
+        for h in gunicorn_handlers:
+            app_log.addHandler(h)
+    else:
+        # Dev / direct python run — stderr is fine.
+        handler = logging.StreamHandler(sys.stderr)
+        handler.setFormatter(logging.Formatter(
+            '%(asctime)s %(levelname)s %(name)s: %(message)s'
+        ))
+        app_log.addHandler(handler)
+
+    app_log.propagate = False  # avoid double-printing via root
+
+
 def create_app(config_name=None):
     if config_name is None:
         config_name = os.environ.get('FLASK_ENV', 'development')
@@ -14,13 +50,11 @@ def create_app(config_name=None):
     app = Flask(__name__)
     app.config.from_object(config[config_name])
 
-    # Ensure app-level loggers (services, routes) emit INFO+ to stderr/Gunicorn
-    if not app.debug and not logging.root.handlers:
-        logging.basicConfig(
-            level=logging.INFO,
-            format='%(asctime)s %(levelname)s %(name)s: %(message)s',
-        )
-    logging.getLogger('app').setLevel(logging.INFO)
+    # Wire app.* loggers into Gunicorn's error log (or stderr in dev).
+    # basicConfig is a no-op under Gunicorn because Gunicorn already
+    # installed root handlers before our app is imported — so we must
+    # attach handlers explicitly.
+    _setup_logging(app)
 
     db.init_app(app)
     login_manager.init_app(app)