## 2.双向关联
子表与主表的双向关联，和关联记录与关联记录的双向关联是一样的操作。
不同的是，在主表里删除子表内的行记录，转成的实体表也会删除记录，而非取消关联记录。
## **3. 操作权限控制**
可精细控制用户对子表数据的交互方式：
* **可新增明细**：允许手动添加行。
* **可编辑已有明细**：允许修改已存在的行数据。
* **可删除已有明细**：允许删除行数据。\
通过组合配置，可实现“仅允许通过工作流或默认值自动填充，禁止手动修改”等高级场景。
## **4. 新增行方式**
* **单行添加**：逐条添加，为默认方式。
* **批量选择添加**：可针对子表内的某个关联记录字段，**一次性批量选择多条记录**生成子表行，极大提升录入效率（例如：在订单明细中一次性勾选多个产品）。
## **5. 行数据操作**
勾选子表行时，会出现 **【复制】** 和 **【删除】** 按钮，支持对单行或批量行进行快速复制或删除。**此功能在公开表单中仅限Web端使用。**
## **6. 验证**
* **子表整体必填**：可设置整个子表控件为必填，即至少需要存在一行明细数据。
* **明细字段验证**：
* **空白子表**：可单独设置其内部每个字段的验证规则（如必填、格式）。
* **引用实体子表**：遵循被引用工作表原有字段的验证规则。
## **7. 字段级权限控制**
在**自定义权限组**、**工作流的审批与填写节点**中，可以针对子表内的**每一个明细字段**单独设置可见、可编辑等精细权限。
---
# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.
## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.
Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:
```
GET https://docs.coreway.com/yoov-plus/worksheet/worksheet-design/field-type/sub-table.md?ask=&goal=
```
`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.
Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.