Add: add base fastapi backend

backend/app/crud.py

@@ -0,0 +1,28 @@
+"""
+CRUD
+Create
+Read
+Update
+Delete
+
+Взаимодействие со схемами Pydantic и моделями в БД.
+"""
+
+from sqlalchemy import select
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from .models import Item
+from .schemas import ItemCreate
+
+
+async def create_item(db: AsyncSession, item: ItemCreate):
+    obj = Item(title=item.title, description=item.description)
+    db.add(obj)
+    await db.commit()
+    await db.refresh(obj)
+    return obj
+
+
+async def list_items(db: AsyncSession):
+    result = await db.execute(select(Item).order_by(Item.id.desc()))
+    return result.scalars().all()