[英]Spring Hibernate LazyInitializationException on @Transactional
[英]Spring @Transactional makes problems in Hibernate
我有一个Play项目,其中使用带有spring @Transactional批注的以下方法:
@Autowired
Home home;
@Transactional
public Result update() {
try {
JsonNode jsonNode = request().body().asJson();
User user = home.updateFromJsonString(jsonNode.toString());
return ok("Updated successfully.");
} catch (Exception e){
return badRequest("Error updating");
}
}
updateFromJsonString方法位于另一个项目中,在此项目中它使用hibernate更改sql表。 问题是当缺少@Transactional批注时,此“更新”方法可以正常工作,但是当它存在时,出现以下异常:
[error] o.h.e.j.s.SqlExceptionHelper - Duplicate entry '1-10' for key 'PRIMARY'
[error] play - Cannot invoke the action, eventually got an error: org.springframework.dao.DataIntegrityViolationException: could not execute statement; SQL [n/a]; constraint [null]; nested exception is org.hibernate.
exception.ConstraintViolationException: could not execute statement
任何想法是什么问题,以及为什么@Transactional会导致此错误?
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