Initial commit: Wallet App - FastAPI backend with React frontend for personal finance tracking

backend/app/database.py

@@ -0,0 +1,30 @@
+"""Database configuration and session management."""
+
+import os
+from sqlalchemy import create_engine
+from sqlalchemy.orm import declarative_base, sessionmaker
+
+# Use SQLite database
+DATABASE_URL = os.getenv("DATABASE_URL", "sqlite:///./data/app.db")
+
+# Create data directory if it doesn't exist
+if DATABASE_URL.startswith("sqlite"):
+    os.makedirs("./data", exist_ok=True)
+
+engine = create_engine(
+    DATABASE_URL,
+    connect_args={"check_same_thread": False} if DATABASE_URL.startswith("sqlite") else {}
+)
+
+SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
+
+Base = declarative_base()
+
+
+def get_db():
+    """Dependency to get database session."""
+    db = SessionLocal()
+    try:
+        yield db
+    finally:
+        db.close()