first commit

app/database/session.py

@@ -0,0 +1,25 @@
+from collections.abc import AsyncIterator
+
+from sqlalchemy.ext.asyncio import AsyncSession, async_sessionmaker, create_async_engine
+
+from app.config.settings import settings
+
+
+engine = create_async_engine(
+    settings.postgres_dsn,
+    echo=settings.debug,
+    pool_pre_ping=True,
+)
+
+AsyncSessionLocal = async_sessionmaker(
+    bind=engine,
+    class_=AsyncSession,
+    autoflush=False,
+    autocommit=False,
+    expire_on_commit=False,
+)
+
+
+async def get_db() -> AsyncIterator[AsyncSession]:
+    async with AsyncSessionLocal() as session:
+        yield session