Fix database migration issues

- Add project root to Python path in migrations/env.py
- Change database URL configuration to ensure database directory exists
- Update alembic.ini to use relative database path
- Make database URL configuration more resilient

alembic.ini

@@ -35,7 +35,8 @@ script_location = migrations
 # are written from script.py.mako
 # output_encoding = utf-8
 
-sqlalchemy.url = sqlite:////app/storage/db/db.sqlite
+# SQLite URL - use a relative path that will be resolved at runtime
+sqlalchemy.url = sqlite:///db.sqlite
 
 [post_write_hooks]
 # post_write_hooks defines scripts or Python functions that are run

app/core/config.py

@@ -21,7 +21,12 @@ class Settings(BaseSettings):
     
     # Database
     DB_DIR: Path = Path("/app") / "storage" / "db"
-    SQLALCHEMY_DATABASE_URL: str = f"sqlite:///{DB_DIR}/db.sqlite"
+    
+    @property
+    def SQLALCHEMY_DATABASE_URL(self) -> str:
+        # Ensure the database directory exists
+        self.DB_DIR.mkdir(parents=True, exist_ok=True)
+        return f"sqlite:///{self.DB_DIR}/db.sqlite"
     
     # CORS
     BACKEND_CORS_ORIGINS: List[AnyHttpUrl] = []

app/db/session.py

@@ -3,8 +3,7 @@ from sqlalchemy.orm import sessionmaker
 
 from app.core.config import settings
 
-# Ensure the DB directory exists
+# Note: Directory creation is now handled in the settings property
-settings.DB_DIR.mkdir(parents=True, exist_ok=True)
 
 engine = create_engine(
     settings.SQLALCHEMY_DATABASE_URL,

migrations/env.py

@@ -1,17 +1,28 @@
+import sys
 from logging.config import fileConfig
+from pathlib import Path
 
 from sqlalchemy import engine_from_config
 from sqlalchemy import pool
 
 from alembic import context
 
+# Add the project root directory to the Python path
+project_root = Path(__file__).parent.parent
+sys.path.insert(0, str(project_root))
+
 # Import from the application models
-from app.db.base import Base
+from app.db.base import Base  # noqa
+from app.core.config import settings  # noqa
 
 # 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 with the one from our settings
+# This ensures we use the same database URL as the application
+config.set_main_option("sqlalchemy.url", settings.SQLALCHEMY_DATABASE_URL)
+
 # Interpret the config file for Python logging.
 # This line sets up loggers basically.
 fileConfig(config.config_file_name)