如附件图片，训练题单中章节的 `_id` 如果为 0 会提示 `each node should have a _id`，但可以为负。示例代码： ```json [ { "_id": -1, "title": "环境测试", "requireNids": [], "pids": [ 1 ] } ] ``` <img width="1000" height="280" alt="Image" src="https://github.com/user-attachments/assets/a0cf67ef-43c2-4fef-9975-0c0af8831c80" />
如附件图片，训练题单中章节的
_id如果为 0 会提示each node should have a _id，但可以为负。示例代码：[ { "_id": -1, "title": "环境测试", "requireNids": [], "pids": [ 1 ] } ]