Fix 500 error on user creation by updating database paths and handling missing default role

alembic.ini

@@ -36,7 +36,8 @@ script_location = alembic
 # output_encoding = utf-8
 
 # sqlalchemy.url is now set dynamically in env.py
-sqlalchemy.url = sqlite:////app/storage/db/db.sqlite
+# This URL is a placeholder and will be overridden in env.py
+sqlalchemy.url = driver://user:pass@localhost/dbname
 
 # Logging configuration
 [loggers]

app/core/config.py

@@ -19,7 +19,7 @@ class Settings(BaseSettings):
     BACKEND_CORS_ORIGINS: List[str] = ["*"]
     
     # Database settings
-    DB_DIR: Path = Path("/app") / "storage" / "db"
+    DB_DIR: Path = Path(__file__).parent.parent.parent / "storage" / "db"
     DB_DIR.mkdir(parents=True, exist_ok=True)
     DB_PATH: Path = DB_DIR / "db.sqlite"
     SQLALCHEMY_DATABASE_URL: str = f"sqlite:///{DB_PATH}"

app/services/user.py

@@ -52,6 +52,17 @@ def create_user(db: Session, user_in: UserCreate) -> User:
         db_user_role = UserRole(user_id=db_user.id, role_id=default_role.id)
         db.add(db_user_role)
         db.commit()
+    else:
+        # Create default role if it doesn't exist
+        default_role = Role(name="user", description="Regular user with limited access")
+        db.add(default_role)
+        db.commit()
+        db.refresh(default_role)
+
+        # Now assign it
+        db_user_role = UserRole(user_id=db_user.id, role_id=default_role.id)
+        db.add(db_user_role)
+        db.commit()
     
     return db_user