Fix database configuration to handle permission issues and improve error handling

alembic.ini

@@ -60,7 +60,8 @@ version_path_separator = os  # Use os.pathsep. Default configuration used for ne
 # are written from script.py.mako
 # output_encoding = utf-8
 
-sqlalchemy.url = sqlite:////app/storage/db/db.sqlite
+# This URL will be overridden by the value in env.py
+sqlalchemy.url = sqlite:///db.sqlite
 
 
 [post_write_hooks]

app/core/config.py

@@ -1,3 +1,4 @@
+import os
 from pydantic_settings import BaseSettings
 from pathlib import Path
 
@@ -9,7 +10,9 @@ class Settings(BaseSettings):
     VERSION: str = "0.1.0"
 
     # Database settings
-    DB_DIR: Path = Path("/app") / "storage" / "db"
+    # Use environment variable for database path or fall back to a directory
+    # relative to the current working directory for better compatibility
+    DB_DIR: Path = Path(os.environ.get("DB_DIR", os.path.join(os.getcwd(), "storage", "db")))
     SQLALCHEMY_DATABASE_URL: str = f"sqlite:///{DB_DIR}/db.sqlite"
 
     class Config:

app/db/session.py

@@ -1,24 +1,59 @@
+import os
+import logging
+from pathlib import Path
 from sqlalchemy import create_engine
 from sqlalchemy.orm import sessionmaker
+from sqlalchemy.exc import SQLAlchemyError
 
 from app.core.config import settings
 
-# Ensure the database directory exists
+logger = logging.getLogger(__name__)
-DB_DIR = settings.DB_DIR
-DB_DIR.mkdir(parents=True, exist_ok=True)
 
-SQLALCHEMY_DATABASE_URL = settings.SQLALCHEMY_DATABASE_URL
+# Ensure the database directory exists with proper error handling
+try:
+    DB_DIR = settings.DB_DIR
+    DB_DIR.mkdir(parents=True, exist_ok=True)
+    logger.info(f"Database directory created at: {DB_DIR}")
+except (PermissionError, OSError) as e:
+    # If we can't create the directory, log the error and try a fallback location
+    logger.error(f"Failed to create database directory at {DB_DIR}: {str(e)}")
+    # Fallback to a directory in the current working directory
+    DB_DIR = Path(os.getcwd()) / "db"
+    DB_DIR.mkdir(parents=True, exist_ok=True)
+    logger.info(f"Using fallback database directory: {DB_DIR}")
 
-engine = create_engine(
+# Create the database URL
-    SQLALCHEMY_DATABASE_URL,
+SQLALCHEMY_DATABASE_URL = f"sqlite:///{DB_DIR}/db.sqlite"
-    connect_args={"check_same_thread": False}
+logger.info(f"Using database URL: {SQLALCHEMY_DATABASE_URL}")
-)
+
-SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
+# Create the engine with proper error handling
+try:
+    engine = create_engine(
+        SQLALCHEMY_DATABASE_URL,
+        connect_args={"check_same_thread": False}
+    )
+    SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
+    logger.info("Database engine initialized successfully")
+except SQLAlchemyError as e:
+    logger.error(f"Failed to initialize database engine: {str(e)}")
+    # Create a dummy engine and session for the app to at least start
+    # This will cause database operations to fail, but the app will start
+    engine = None
+    SessionLocal = None
 
 
 def get_db():
+    if SessionLocal is None:
+        # If SessionLocal is None, the database engine failed to initialize
+        # Log an error and raise an exception
+        logger.error("Cannot get database session: Database engine not initialized")
+        raise SQLAlchemyError("Database engine not initialized")
+    
     db = SessionLocal()
     try:
         yield db
+    except SQLAlchemyError as e:
+        logger.error(f"Database error: {str(e)}")
+        raise
     finally:
         db.close()

main.py

@@ -1,7 +1,27 @@
 import uvicorn
+import logging
+import sys
 from app.core.app import create_app
 
-app = create_app()
+# Configure logging
+logging.basicConfig(
+    level=logging.INFO,
+    format="%(asctime)s - %(name)s - %(levelname)s - %(message)s",
+    handlers=[
+        logging.StreamHandler(sys.stdout)
+    ]
+)
+logger = logging.getLogger(__name__)
+
+# Create FastAPI application
+logger.info("Initializing FastAPI application")
+try:
+    app = create_app()
+    logger.info("FastAPI application initialized successfully")
+except Exception as e:
+    logger.error(f"Failed to initialize FastAPI application: {str(e)}")
+    # Re-raise the exception for supervisor to see
+    raise
 
 if __name__ == "__main__":
     uvicorn.run("main:app", host="0.0.0.0", port=8000, reload=True)

migrations/env.py

@@ -4,11 +4,15 @@ from sqlalchemy import engine_from_config
 from sqlalchemy import pool
 
 from alembic import context
+from app.db.session import SQLALCHEMY_DATABASE_URL
 
 # this is the Alembic Config object, which provides
 # access to the values within the .ini file in use.
 config = context.config
 
+# Override the sqlalchemy.url in the Alembic config with our actual URL
+config.set_main_option("sqlalchemy.url", SQLALCHEMY_DATABASE_URL)
+
 # Interpret the config file for Python logging.
 # This line sets up loggers basically.
 if config.config_file_name is not None: