英文:
Hibernate in SpringBoot does not persist all Entities in same transaction
问题
我使用的是Hibernate版本5.4.22.Final，SpringBoot版本为2.3.5.RELEASE，并且使用以下代码：
控制器（CONTROLLER）：
@PostMapping("/insert/{id}")public MyReposneEntitiy insertAutoAndSendNotification(@PathVariable("id") int id, @Valid @RequestBody Auto auto) {MyReposneEntitiy e = service.insertAuto(auto, id);service.sendNotification(id);return e;}
服务（SERVICE）：
@Transactionalpublic MyReposneEntitiy insertAuto(Auto auto, int id) {InfoForAuto info = infoRepo.findById(id).get();entityManager.detach(info);// 这个字段用@Version注解标记，// 如果实体在持久化上下文中，它不能被更改// 这就是为什么我首先要将其分离，然后再保存info.setVersion(auto.getVersion());infoRepo.save(info);Person person = personService.createPerson(auto.getPerson());Eng eng = engService.createEng(auto.getEng(), person.getId());info.setMSDNumber(auto.getMSDNumber());info.setStatus(Constants.OK);MyReposneEntitiy response = new MyReposneEntitiy ();response.setStatus(Constants.OK);return response;}public void sendNotification(int id){// 一些代码...}
被调用的服务方法（CALLED SERVICE METHOD）：
@Transactionalpublic PersonResponse createPerson(PersonInput pesronInput) {...}@Transactionalpublic EngResponse createEng(EngInput engInput, Integer personId) {...}
现在的问题是，当insertAuto()方法结束并且我处于sendNotification()方法的第一行（在调试模式下），我检查数据库发现，“person”和“eng”已经在数据库中创建，但“info”实体没有被更新。但我需要在调用sendNotification方法之前更新它，我无法弄清楚为什么？它们不都在同一个事务中吗？Hibernate应该要么保存所有实体，要么不保存任何实体吧？
英文:
I'm using Hibernate version 5.4.22.Final, with SpringBoot 2.3.5.RELEASE, and using this code:
CONTROLLER:
@PostMapping("/insert/{id}")public MyReposneEntitiy insertAutoAndSendNotification(@PathVariable("id") int id, @Valid @RequestBody Auto auto) {MyReposneEntitiy e = service.insertAuto(auto, id);service.sendNotification(id);return e;}
SERVICE:
@Transactionalpublic MyReposneEntitiy insertAuto(Auto auto, int id) {InfoForAuto info = infoRepo.findById(id).get();entityManager.detach(info);//this is annotated with @Version,//and it can not be changed if the entity is in Persistence Contexxt//that's why I'm detaching first and then saveinfo.setVersion(auto.getVersion());infoRepo.save(info);Person person = personService.createPerson(auto.getPerson());Eng eng = engService.createEng(auto.getEng(), person.getId());info.setMSDNumber(auto.getMSDNumber());info.setStatus(Constants.OK);MyReposneEntitiy response = new MyReposneEntitiy ();response.setStatus(Constants.OK);return response;}public void sendNotification(int id){//some code...}
CALLED SERVICE METHOD:
@Transactionalpublic PersonResponse createPerson(PersonInput pesronInput) {...}@Transactionalpublic EngResponse createEng(EngInput engInput, Integer personId) {...}
Now, the problem is, when insertAuto() method ends, and I'm in the first line in sendNotification() method (in debugging mode) I check the database and the "person" and "eng" are created in the database but the info entity is not updated, but I need it to be updated before I call sendNotification method, and I cant figure out why? Aren't they in the same transaction, and hibernate should either save all entities or save none?
答案1
得分: 1
当我调用 "infoRepo.save(info);" 时，save() 方法作为返回对象具有在Persistence Context中持久化的实体，所以我只需要执行 info = infoRepo.save(info);，现在它按预期工作。
英文:
OK, so I found what the problem was.
When I call "infoRepo.save(info);" the save() method as a return object have the entity that is persisted in Pestistence Context, so all I had to do is info = infoRepo.save(info); and now it works as it should.
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