Update 2025-12-19 19:18:16

backend/models/user.py

@@ -113,14 +113,24 @@ class User(db.Model, UserMixin):
         q = (email or "").strip().lower()
         if not q:
             return None
-        return User.query.filter_by(email=q).first()
+        try:
+            return User.query.filter_by(email=q).first()
+        except Exception as e:
+            logging.error(f"User find_by_email error: {e}")
+            db.session.rollback()
+            return None
 
     @staticmethod
     def find_by_username(username: Optional[str]) -> Optional["User"]:
         q = (username or "").strip()
         if not q:
             return None
-        return User.query.filter_by(username=q).first()
+        try:
+            return User.query.filter_by(username=q).first()
+        except Exception as e:
+            logging.error(f"User find_by_username error: {e}")
+            db.session.rollback()
+            return None
 
 
 # Flask-Login user_loader (SQLAlchemy 2.0 방식)