Connect to database and add first models

database/database.py

@@ -0,0 +1,26 @@
+from sqlalchemy.ext.declarative import declarative_base
+from sqlalchemy.orm import sessionmaker
+from sqlalchemy.ext.asyncio import AsyncSession
+from sqlalchemy.ext.asyncio import create_async_engine
+
+DATABASE_URL = "sqlite+aiosqlite:///./dev_database.db"
+# DATABASE_URL = "postgresql://user:password@postgresserver/db"
+
+engine = create_async_engine(
+    DATABASE_URL, connect_args={"check_same_thread": False}, echo=True
+)
+async_session = sessionmaker(
+    engine, class_=AsyncSession, expire_on_commit=False)
+Base = declarative_base()
+
+
+async def get_session() -> AsyncSession:  # type: ignore
+    # Dependency
+    async with async_session() as session:  # type: ignore
+        yield session
+
+
+async def init_models():
+    async with engine.begin() as conn:
+        await conn.run_sync(Base.metadata.drop_all)
+        await conn.run_sync(Base.metadata.create_all)