文件版本管理-初步优化

backend/app/crud/acknowledgement.py

@@ -0,0 +1,36 @@
+import uuid
+from typing import Sequence
+
+from sqlalchemy import select
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.models.acknowledgement import Acknowledgement, AcknowledgementType
+
+
+async def create(db: AsyncSession, ack: Acknowledgement, *, commit: bool = True) -> Acknowledgement:
+    db.add(ack)
+    if commit:
+        await db.commit()
+        await db.refresh(ack)
+    return ack
+
+
+async def get_existing(
+    db: AsyncSession,
+    distribution_id: uuid.UUID,
+    user_id: uuid.UUID,
+    ack_type: AcknowledgementType,
+) -> Acknowledgement | None:
+    result = await db.execute(
+        select(Acknowledgement).where(
+            Acknowledgement.distribution_id == distribution_id,
+            Acknowledgement.user_id == user_id,
+            Acknowledgement.ack_type == ack_type,
+        )
+    )
+    return result.scalar_one_or_none()
+
+
+async def list_by_distribution(db: AsyncSession, distribution_id: uuid.UUID) -> Sequence[Acknowledgement]:
+    result = await db.execute(select(Acknowledgement).where(Acknowledgement.distribution_id == distribution_id))
+    return result.scalars().all()