Add initial project

backend/database.py

@@ -0,0 +1,29 @@
+from sqlalchemy import create_engine
+from sqlalchemy.ext.declarative import declarative_base
+from sqlalchemy.orm import sessionmaker
+import os
+from .core.config import settings
+
+# Ensure data directory exists for SQLite
+if settings.DATABASE_URL.startswith("sqlite"):
+    os.makedirs("./data", exist_ok=True)
+
+# Create engine with appropriate settings based on database type
+if settings.DATABASE_URL.startswith("sqlite"):
+    engine = create_engine(
+        settings.DATABASE_URL,
+        connect_args={"check_same_thread": False}
+    )
+else:
+    engine = create_engine(settings.DATABASE_URL)
+
+SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
+
+Base = declarative_base()
+
+def get_db():
+    db = SessionLocal()
+    try:
+        yield db
+    finally:
+        db.close()