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{"role":"user","message":{"content":[{"type":"text","text":"<attached_files>\n\n<code_selection path=\"/Users/kazusa/IdeaProjects/baoshi/wms/baoshi-robot/baoshi-robot-core/src/main/java/com/baoshi/robot/core/strategy/execute/impl/hk/HkStationReleaseExecutionStrategy.java\" lines=\"215-218\">\n machineTaskChainService.lambdaUpdate()\n .eq(MachineTaskChain::getCode, chain.getCode())\n .set(MachineTaskChain::getSku, req.getSku())\n .update();\n</code_selection>\n\n<code_selection path=\"/Users/kazusa/IdeaProjects/baoshi/wms/baoshi-robot/baoshi-robot-core/src/main/java/com/baoshi/robot/core/strategy/execute/impl/hk/HkStationReleaseExecutionStrategy.java\" lines=\"215-218\">\n machineTaskChainService.lambdaUpdate()\n .eq(MachineTaskChain::getCode, chain.getCode())\n .set(MachineTaskChain::getSku, req.getSku())\n .update();\n</code_selection>\n\n</attached_files>\n<user_query>\n\n@HkStationReleaseExecutionStrategy.java (215-218) 这种方式List转json会报错\n</user_query>"}]}}
{"role":"assistant","message":{"content":[{"type":"text","text":"分析问题:查看相关代码以确认 `sku` 字段的类型及 List 转 JSON 的实现。"}]}}
{"role":"assistant","message":{"content":[{"type":"text","text":"结论:使用 `lambdaUpdate().set(MachineTaskChain::getSku, req.getSku())` 时,`@TableField` 的 `typeHandler` 不会生效,导致 List 无法正确序列化为 JSON。正在确认项目中其他类似场景的写法"}]}}
{"role":"assistant","message":{"content":[{"type":"text","text":"查看 MyBatis-Plus 的 `set` 方法及 Waybill 实体的字段类型:"}]}}
{"role":"assistant","message":{"content":[{"type":"text","text":"制定方案中:变更文件在 3 个以内且改动小于 30 行,直接执行。"}]}}
{"role":"assistant","message":{"content":[{"type":"text","text":"修改已完成linter 未发现与本次改动相关的新问题。\n\n---\n\n## 问题与处理\n\n**原因**:使用 `lambdaUpdate().set(MachineTaskChain::getSku, req.getSku())` 时,`@TableField` 上的 `JSONToListTypeHandler` 不会生效。MyBatis-Plus 在动态更新时不会对 `set()` 的值应用 TypeHandler直接把 `List<String>` 传给 JDBC导致 List 无法正确序列化为 JSON 并报错。\n\n**处理方式**:改为通过 `updateById` 更新实体,让 MyBatis 在构建 SQL 时使用实体上的 TypeHandler正确将 `List<String>` 转为 JSON 字符串:\n\n```java\n// 更新任务链的skulambdaUpdate.set 不会触发 TypeHandler需通过 updateById 让 List 正确序列化为 JSON\nchain.setSku(req.getSku());\nmachineTaskChainService.updateById(chain);\n```\n\n这与项目中 `WaybillDataServiceImpl` 对 JSON 字段使用 `JSONObject.toJSONString()` 再 `set()` 的做法一致,都是避免 `lambdaUpdate().set()` 不触发 TypeHandler 的问题。"}]}}