配置文件对象具有任务列表。 保存新配置文件时,任务列表也应与数据库(已插入或已更新)同步。问题是profile-repository&lt; b> save() -method只允许一个或另一个方法依赖于属性上方的级联属性集( CascadeType.PERSIST或MERGE < / i>的)。
Profile类
@Entity
@Inheritance(strategy = InheritanceType.SINGLE_TABLE)
public abstract class AbstractProfile implements Profile {
...
@OneToMany(fetch = FetchType.EAGER, cascade = CascadeType.PERSIST)
private List<Task> tasks;
..
JUnit-Test类
public class ProfileTaskRepositoryTest {
@Autowired
private ProfileRepository profileRepo; //extends JpaRepository
@Autowired
private TaskRepository taskRepo; //extends JpaRepository
@Test // ->this test passes
public void testCreateProfileWithNewTask() {
//profileData and taskData hold dummy data. They return new objects
AbstractProfile interview = profileData.createITInterviewProfile();
Task questionTask = taskData.createInterviewQuestionTask();
//add new task to profile and save
interview.addTask(questionTask);
profileRepo.save(interview);
//task repository confirms the insertion
assertTrue(taskRepo.count() == 1);
}
@Test // ->this test fails
public void testCreateProfileWithExistingTask() {
//first create task and save in DB
Task questionTask = taskData.createInterviewQuestionTask(); // transient obj
taskRepo.save(questionTask); // questionTask becomes detached
// then create a new profile and add the existing task.
// the problem is the existing task is now detached)
AbstractProfile interview = profileData.createITInterviewProfile();
interview.addTask(questionTask);
profileRepo.save(interview); // !!! this throws an exception
}
我认为当taskRepo将其保存在数据库中然后关闭会话时, questionTask - 对象将被分离。
例外:
org.springframework.orm.jpa.JpaSystemException: org.hibernate.PersistentObjectException: detached entity passed to persist: *.Task; nested exception is javax.persistence.PersistenceException: org.hibernate.PersistentObjectException: detached entity passed to persist: *.Task
...
profileRepo.save()应该能够处理任务列表的插入和更新。有没有一种优雅的方法来解决这个问题?
答案 0 :(得分:2)
您应该在测试类上放置@Transactional
属性以避免异常。
@Transactional
@TransactionConfiguration
public class ProfileTaskRepositoryTest {
}
希望这有帮助。
答案 1 :(得分:0)
尝试cascade = {CascadeType.PERSIST,CascadeType.MERGE}
答案 2 :(得分:0)
Hibernate会话已过期;
使用
= markdown string_in_markdown_format
或
spring.datasource.removeAbandoned=false