Step 4：评论 / 附件 / 审计日志

backend/app/crud/comment.py

@@ -0,0 +1,48 @@
+import uuid
+from typing import Sequence
+
+from sqlalchemy import select
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.models.comment import Comment
+from app.schemas.comment import CommentCreate
+
+
+async def create_comment(
+    db: AsyncSession,
+    study_id: uuid.UUID,
+    entity_type: str,
+    entity_id: uuid.UUID,
+    comment_in: CommentCreate,
+    created_by: uuid.UUID,
+) -> Comment:
+    comment = Comment(
+        study_id=study_id,
+        entity_type=entity_type,
+        entity_id=entity_id,
+        content=comment_in.content,
+        created_by=created_by,
+    )
+    db.add(comment)
+    await db.commit()
+    await db.refresh(comment)
+    return comment
+
+
+async def list_comments(
+    db: AsyncSession,
+    study_id: uuid.UUID,
+    entity_type: str,
+    entity_id: uuid.UUID,
+) -> Sequence[Comment]:
+    result = await db.execute(
+        select(Comment)
+        .where(
+            Comment.study_id == study_id,
+            Comment.entity_type == entity_type,
+            Comment.entity_id == entity_id,
+            Comment.is_deleted.is_(False),
+        )
+        .order_by(Comment.created_at.asc())
+    )
+    return result.scalars().all()