style: format the repository with prettier

These files were already out of step with the project's Prettier config
before this branch of work; running `pnpm format` finally swept them up.
No semantic changes.

Kept separate from the functional commits so the reformatting does not
bury them in diff noise.
This commit is contained in:
zihluwang committed 2026-09-25 15:37:59 +08:00
1 parent 6800f7251d
commit 861852961f
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@@ -99,11 +99,11 @@ N+1 问题是指 JPA 先执行 1 条查询获取父实体,再为每条父实
**修复方案:**
| 方式 | 适用场景 |
|---------------------------|----------------------|
| `@EntityGraph` | 声明式,适合为特定实体定制抓取计划 |
| `@Query` 中使用 `JOIN FETCH` | 按查询精细控制 |
| `@BatchSize` | 将 N+1 降低为 N/k+1,批量加载 |
| 方式 | 适用场景 |
| ---------------------------- | ---------------------------------- |
| `@EntityGraph` | 声明式,适合为特定实体定制抓取计划 |
| `@Query` 中使用 `JOIN FETCH` | 按查询精细控制 |
| `@BatchSize` | 将 N+1 降低为 N/k+1,批量加载 |
```java
// 方式一:EntityGraph
@@ -139,6 +139,7 @@ post.setAuthor(userRepository.getReferenceById(userId));
@Query("SELECT new com.example.UserDto(u.id, u.name) FROM User u WHERE u.id = :id")
UserDto findUserDtoById(@Param("id") long id);
```
3. **在 Service 方法上使用 `@Transactional(readOnly = true)`** — 使 Session 在整个方法作用域内保持打开。
### 什么时候该用 `@Transactional(readOnly = true)`?
@@ -270,7 +271,7 @@ public class Product {
### 如何选择
| 场景 | 注解 |
|----------------------------------------|--------------------|
| 平铺字段固定的嵌套对象(如地址、配置) | `@JsonUnwrapped` |
| 平铺 key 不固定的动态键值对 | `@JsonAnyGetter` |
| 场景 | 注解 |
| -------------------------------------- | ---------------- |
| 平铺字段固定的嵌套对象(如地址、配置) | `@JsonUnwrapped` |
| 平铺 key 不固定的动态键值对 | `@JsonAnyGetter` |