"Not-null property references a transient value" 尝试使用 Spring Data JPA + Lombok 级联持久性时
"Not-null property references a transient value" when attempting to cascade persistence using Spring Data JPA + Lombok
我正在尝试从父实体级联子实体的持久性，但这种关系没有得到维护，我也不知道为什么。
我试过将级联放在 other/both 侧，以及使用 CascadeType.PERSIST 而不是 CascadeType.ALL（正如某些文章所建议的那样），但没有成功.
如有任何帮助，我们将不胜感激。
@DataJpaTest
public class TaskEntityRepositoryIntegrationTests {
@Inject
private TaskEntityRepository taskEntityRepository;
@Test
void testRelationshipPersistence() {
TaskDao taskDao = TaskDao.builder()
.title("Title")
.build();
TagDao tagDao = TagDao.builder()
.tag("Tag")
.task(taskDao)
.build();
taskDao = taskDao.toBuilder()
.tag(tagDao)
.build();
TaskDao result = this.taskEntityRepository.save(taskDao);
assertEquals(tagDao, result.getTags().iterator().next());
}
}
2020-09-16 11:16:57.317 INFO 11406 --- [ main] o.s.t.c.transaction.TransactionContext : Began transaction (1) for test context [DefaultTestContext@5038d0b5 testClass = TaskEntityRepositoryIntegrationTests, testInstance = TaskEntityRepositoryIntegrationTests@1169afe1, testMethod = testRelationshipPersistence@TaskEntityRepositoryIntegrationTests, testException = [null], mergedContextConfiguration = [MergedContextConfiguration@32115b28 testClass = TaskEntityRepositoryIntegrationTests, locations = '{}', classes = '{class TasksApplication}', contextInitializerClasses = '[]', activeProfiles = '{}', propertySourceLocations = '{}', propertySourceProperties = '{org.springframework.boot.test.autoconfigure.orm.jpa.DataJpaTestContextBootstrapper=true}', contextCustomizers = set[[ImportsContextCustomizer@2ad48653 key = [org.springframework.boot.autoconfigure.cache.CacheAutoConfiguration, org.springframework.boot.autoconfigure.data.jpa.JpaRepositoriesAutoConfiguration, org.springframework.boot.autoconfigure.flyway.FlywayAutoConfiguration, org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration, org.springframework.boot.autoconfigure.jdbc.DataSourceTransactionManagerAutoConfiguration, org.springframework.boot.autoconfigure.jdbc.JdbcTemplateAutoConfiguration, org.springframework.boot.autoconfigure.liquibase.LiquibaseAutoConfiguration, org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaAutoConfiguration, org.springframework.boot.autoconfigure.transaction.TransactionAutoConfiguration, org.springframework.boot.test.autoconfigure.jdbc.TestDatabaseAutoConfiguration, org.springframework.boot.test.autoconfigure.orm.jpa.TestEntityManagerAutoConfiguration]], org.springframework.boot.test.context.filter.ExcludeFilterContextCustomizer@618425b5, org.springframework.boot.test.json.DuplicateJsonObjectContextCustomizerFactory$DuplicateJsonObjectContextCustomizer@f5acb9d, org.springframework.boot.test.mock.mockito.MockitoContextCustomizer@0, org.springframework.boot.test.autoconfigure.OverrideAutoConfigurationContextCustomizerFactory$DisableAutoConfigurationContextCustomizer@54bff557, org.springframework.boot.test.autoconfigure.filter.TypeExcludeFiltersContextCustomizer@351584c0, org.springframework.boot.test.autoconfigure.properties.PropertyMappingContextCustomizer@8b05feb1, org.springframework.boot.test.autoconfigure.web.servlet.WebDriverContextCustomizerFactory$Customizer@59505b48, org.springframework.boot.test.context.SpringBootTestArgs@1], contextLoader = 'org.springframework.boot.test.context.SpringBootContextLoader', parent = [null]], attributes = map[[empty]]]; transaction manager [org.springframework.orm.jpa.JpaTransactionManager@46a0ef6f]; rollback [true]
Hibernate: insert into tasks (id, title) values (null, ?)
2020-09-16 11:16:57.868 WARN 11406 --- [ main] o.h.a.i.UnresolvedEntityInsertActions : HHH000437: Attempting to save one or more entities that have a non-nullable association with an unsaved transient entity. The unsaved transient entity must be saved in an operation prior to saving these dependent entities.
Unsaved transient entity: ([TaskDao#<null>])
Dependent entities: ([[TagDao#<null>]])
Non-nullable association(s): ([TagDao.task])
2020-09-16 11:16:57.883 INFO 11406 --- [ main] o.s.t.c.transaction.TransactionContext : Rolled back transaction for test: [DefaultTestContext@5038d0b5 testClass = TaskEntityRepositoryIntegrationTests, testInstance = TaskEntityRepositoryIntegrationTests@1169afe1, testMethod = testRelationshipPersistence@TaskEntityRepositoryIntegrationTests, testException = org.springframework.dao.InvalidDataAccessApiUsageException: org.hibernate.TransientPropertyValueException: Not-null property references a transient value - transient instance must be saved before current operation : TagDao.task -> TaskDao; nested exception is java.lang.IllegalStateException: org.hibernate.TransientPropertyValueException: Not-null property references a transient value - transient instance must be saved before current operation : TagDao.task -> TaskDao, mergedContextConfiguration = [MergedContextConfiguration@32115b28 testClass = TaskEntityRepositoryIntegrationTests, locations = '{}', classes = '{class TasksApplication}', contextInitializerClasses = '[]', activeProfiles = '{}', propertySourceLocations = '{}', propertySourceProperties = '{org.springframework.boot.test.autoconfigure.orm.jpa.DataJpaTestContextBootstrapper=true}', contextCustomizers = set[[ImportsContextCustomizer@2ad48653 key = [org.springframework.boot.autoconfigure.cache.CacheAutoConfiguration, org.springframework.boot.autoconfigure.data.jpa.JpaRepositoriesAutoConfiguration, org.springframework.boot.autoconfigure.flyway.FlywayAutoConfiguration, org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration, org.springframework.boot.autoconfigure.jdbc.DataSourceTransactionManagerAutoConfiguration, org.springframework.boot.autoconfigure.jdbc.JdbcTemplateAutoConfiguration, org.springframework.boot.autoconfigure.liquibase.LiquibaseAutoConfiguration, org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaAutoConfiguration, org.springframework.boot.autoconfigure.transaction.TransactionAutoConfiguration, org.springframework.boot.test.autoconfigure.jdbc.TestDatabaseAutoConfiguration, org.springframework.boot.test.autoconfigure.orm.jpa.TestEntityManagerAutoConfiguration]], org.springframework.boot.test.context.filter.ExcludeFilterContextCustomizer@618425b5, org.springframework.boot.test.json.DuplicateJsonObjectContextCustomizerFactory$DuplicateJsonObjectContextCustomizer@f5acb9d, org.springframework.boot.test.mock.mockito.MockitoContextCustomizer@0, org.springframework.boot.test.autoconfigure.OverrideAutoConfigurationContextCustomizerFactory$DisableAutoConfigurationContextCustomizer@54bff557, org.springframework.boot.test.autoconfigure.filter.TypeExcludeFiltersContextCustomizer@351584c0, org.springframework.boot.test.autoconfigure.properties.PropertyMappingContextCustomizer@8b05feb1, org.springframework.boot.test.autoconfigure.web.servlet.WebDriverContextCustomizerFactory$Customizer@59505b48, org.springframework.boot.test.context.SpringBootTestArgs@1], contextLoader = 'org.springframework.boot.test.context.SpringBootContextLoader', parent = [null]], attributes = map[[empty]]]
org.springframework.dao.InvalidDataAccessApiUsageException: org.hibernate.TransientPropertyValueException: Not-null property references a transient value - transient instance must be saved before current operation : TagDao.task -> TaskDao; nested exception is java.lang.IllegalStateException: org.hibernate.TransientPropertyValueException: Not-null property references a transient value - transient instance must be saved before current operation : TagDao.task -> TaskDao
@Data
@Entity
@NoArgsConstructor
@AllArgsConstructor
@Table(name="tasks")
@Builder(toBuilder = true)
public class TaskDao implements Serializable {
private static final long serialVersionUID = -1128682442577176872L;
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
Long id;
@Column
String title;
@Singular
@OneToMany(mappedBy= "task", cascade = CascadeType.ALL)
Collection<TagDao> tags;
}
@Data
@Entity
@NoArgsConstructor
@AllArgsConstructor
@Table(name="tags")
@Builder(toBuilder = true)
public class TagDao implements Serializable {
private static final long serialVersionUID = -1128682442577176872L;
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
Long id;
@Column
String tag;
@ManyToOne(optional = false)
TaskDao task;
}
@Repository
public interface TaskEntityRepository extends JpaRepository<TaskDao, Long> {
}
如果我删除这些行，则保存成功，但断言失败，因为父端的关系为空
taskDao = taskDao.toBuilder()
.tag(tagDao)
.build();
2020-09-16 12:09:46.134 INFO 12078 --- [ main] o.s.t.c.transaction.TransactionContext : Began transaction (1) for test context [DefaultTestContext@18f8cd79 testClass = TaskEntityRepositoryIntegrationTests, testInstance = TaskEntityRepositoryIntegrationTests@33f676f6, testMethod = testRelationshipPersistence@TaskEntityRepositoryIntegrationTests, testException = [null], mergedContextConfiguration = [MergedContextConfiguration@3e2055d6 testClass = TaskEntityRepositoryIntegrationTests, locations = '{}', classes = '{class TasksApplication}', contextInitializerClasses = '[]', activeProfiles = '{}', propertySourceLocations = '{}', propertySourceProperties = '{org.springframework.boot.test.autoconfigure.orm.jpa.DataJpaTestContextBootstrapper=true}', contextCustomizers = set[[ImportsContextCustomizer@50029372 key = [org.springframework.boot.autoconfigure.cache.CacheAutoConfiguration, org.springframework.boot.autoconfigure.data.jpa.JpaRepositoriesAutoConfiguration, org.springframework.boot.autoconfigure.flyway.FlywayAutoConfiguration, org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration, org.springframework.boot.autoconfigure.jdbc.DataSourceTransactionManagerAutoConfiguration, org.springframework.boot.autoconfigure.jdbc.JdbcTemplateAutoConfiguration, org.springframework.boot.autoconfigure.liquibase.LiquibaseAutoConfiguration, org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaAutoConfiguration, org.springframework.boot.autoconfigure.transaction.TransactionAutoConfiguration, org.springframework.boot.test.autoconfigure.jdbc.TestDatabaseAutoConfiguration, org.springframework.boot.test.autoconfigure.orm.jpa.TestEntityManagerAutoConfiguration]], org.springframework.boot.test.context.filter.ExcludeFilterContextCustomizer@5acf93bb, org.springframework.boot.test.json.DuplicateJsonObjectContextCustomizerFactory$DuplicateJsonObjectContextCustomizer@614ca7df, org.springframework.boot.test.mock.mockito.MockitoContextCustomizer@0, org.springframework.boot.test.autoconfigure.OverrideAutoConfigurationContextCustomizerFactory$DisableAutoConfigurationContextCustomizer@6392827e, org.springframework.boot.test.autoconfigure.filter.TypeExcludeFiltersContextCustomizer@351584c0, org.springframework.boot.test.autoconfigure.properties.PropertyMappingContextCustomizer@8b05feb1, org.springframework.boot.test.autoconfigure.web.servlet.WebDriverContextCustomizerFactory$Customizer@2dc54ad4, org.springframework.boot.test.context.SpringBootTestArgs@1], contextLoader = 'org.springframework.boot.test.context.SpringBootContextLoader', parent = [null]], attributes = map[[empty]]]; transaction manager [org.springframework.orm.jpa.JpaTransactionManager@787a4519]; rollback [true]
Hibernate: insert into tasks (id, title) values (null, ?)
Hibernate: select taskdao0_.id as id1_3_, taskdao0_.title as title7_3_ from tasks taskdao0_
2020-09-16 12:09:46.828 INFO 12078 --- [ main] o.s.t.c.transaction.TransactionContext : Rolled back transaction for test: [DefaultTestContext@18f8cd79 testClass = TaskEntityRepositoryIntegrationTests, testInstance = TaskEntityRepositoryIntegrationTests@33f676f6, testMethod = testRelationshipPersistence@TaskEntityRepositoryIntegrationTests, testException = java.util.NoSuchElementException, mergedContextConfiguration = [MergedContextConfiguration@3e2055d6 testClass = TaskEntityRepositoryIntegrationTests, locations = '{}', classes = '{class TasksApplication}', contextInitializerClasses = '[]', activeProfiles = '{}', propertySourceLocations = '{}', propertySourceProperties = '{org.springframework.boot.test.autoconfigure.orm.jpa.DataJpaTestContextBootstrapper=true}', contextCustomizers = set[[ImportsContextCustomizer@50029372 key = [org.springframework.boot.autoconfigure.cache.CacheAutoConfiguration, org.springframework.boot.autoconfigure.data.jpa.JpaRepositoriesAutoConfiguration, org.springframework.boot.autoconfigure.flyway.FlywayAutoConfiguration, org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration, org.springframework.boot.autoconfigure.jdbc.DataSourceTransactionManagerAutoConfiguration, org.springframework.boot.autoconfigure.jdbc.JdbcTemplateAutoConfiguration, org.springframework.boot.autoconfigure.liquibase.LiquibaseAutoConfiguration, org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaAutoConfiguration, org.springframework.boot.autoconfigure.transaction.TransactionAutoConfiguration, org.springframework.boot.test.autoconfigure.jdbc.TestDatabaseAutoConfiguration, org.springframework.boot.test.autoconfigure.orm.jpa.TestEntityManagerAutoConfiguration]], org.springframework.boot.test.context.filter.ExcludeFilterContextCustomizer@5acf93bb, org.springframework.boot.test.json.DuplicateJsonObjectContextCustomizerFactory$DuplicateJsonObjectContextCustomizer@614ca7df, org.springframework.boot.test.mock.mockito.MockitoContextCustomizer@0, org.springframework.boot.test.autoconfigure.OverrideAutoConfigurationContextCustomizerFactory$DisableAutoConfigurationContextCustomizer@6392827e, org.springframework.boot.test.autoconfigure.filter.TypeExcludeFiltersContextCustomizer@351584c0, org.springframework.boot.test.autoconfigure.properties.PropertyMappingContextCustomizer@8b05feb1, org.springframework.boot.test.autoconfigure.web.servlet.WebDriverContextCustomizerFactory$Customizer@2dc54ad4, org.springframework.boot.test.context.SpringBootTestArgs@1], contextLoader = 'org.springframework.boot.test.context.SpringBootContextLoader', parent = [null]], attributes = map[[empty]]]
java.util.NoSuchElementException
at java.base/java.util.Collections$EmptyIterator.next(Collections.java:4277)
at org.hibernate.collection.internal.AbstractPersistentCollection$IteratorProxy.next(AbstractPersistentCollection.java:883)
at TaskEntityRepositoryIntegrationTests.testRelationshipPersistence(TaskEntityRepositoryIntegrationTests.java:98)
结果是 Lombok 构建器没有像我想的那样更新 Dao，而是替换它，然后导致 ORM 认为它是一个新对象
我正在尝试从父实体级联子实体的持久性，但这种关系没有得到维护，我也不知道为什么。
我试过将级联放在 other/both 侧，以及使用 CascadeType.PERSIST 而不是 CascadeType.ALL（正如某些文章所建议的那样），但没有成功.
如有任何帮助，我们将不胜感激。
@DataJpaTest
public class TaskEntityRepositoryIntegrationTests {
@Inject
private TaskEntityRepository taskEntityRepository;
@Test
void testRelationshipPersistence() {
TaskDao taskDao = TaskDao.builder()
.title("Title")
.build();
TagDao tagDao = TagDao.builder()
.tag("Tag")
.task(taskDao)
.build();
taskDao = taskDao.toBuilder()
.tag(tagDao)
.build();
TaskDao result = this.taskEntityRepository.save(taskDao);
assertEquals(tagDao, result.getTags().iterator().next());
}
}
2020-09-16 11:16:57.317 INFO 11406 --- [ main] o.s.t.c.transaction.TransactionContext : Began transaction (1) for test context [DefaultTestContext@5038d0b5 testClass = TaskEntityRepositoryIntegrationTests, testInstance = TaskEntityRepositoryIntegrationTests@1169afe1, testMethod = testRelationshipPersistence@TaskEntityRepositoryIntegrationTests, testException = [null], mergedContextConfiguration = [MergedContextConfiguration@32115b28 testClass = TaskEntityRepositoryIntegrationTests, locations = '{}', classes = '{class TasksApplication}', contextInitializerClasses = '[]', activeProfiles = '{}', propertySourceLocations = '{}', propertySourceProperties = '{org.springframework.boot.test.autoconfigure.orm.jpa.DataJpaTestContextBootstrapper=true}', contextCustomizers = set[[ImportsContextCustomizer@2ad48653 key = [org.springframework.boot.autoconfigure.cache.CacheAutoConfiguration, org.springframework.boot.autoconfigure.data.jpa.JpaRepositoriesAutoConfiguration, org.springframework.boot.autoconfigure.flyway.FlywayAutoConfiguration, org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration, org.springframework.boot.autoconfigure.jdbc.DataSourceTransactionManagerAutoConfiguration, org.springframework.boot.autoconfigure.jdbc.JdbcTemplateAutoConfiguration, org.springframework.boot.autoconfigure.liquibase.LiquibaseAutoConfiguration, org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaAutoConfiguration, org.springframework.boot.autoconfigure.transaction.TransactionAutoConfiguration, org.springframework.boot.test.autoconfigure.jdbc.TestDatabaseAutoConfiguration, org.springframework.boot.test.autoconfigure.orm.jpa.TestEntityManagerAutoConfiguration]], org.springframework.boot.test.context.filter.ExcludeFilterContextCustomizer@618425b5, org.springframework.boot.test.json.DuplicateJsonObjectContextCustomizerFactory$DuplicateJsonObjectContextCustomizer@f5acb9d, org.springframework.boot.test.mock.mockito.MockitoContextCustomizer@0, org.springframework.boot.test.autoconfigure.OverrideAutoConfigurationContextCustomizerFactory$DisableAutoConfigurationContextCustomizer@54bff557, org.springframework.boot.test.autoconfigure.filter.TypeExcludeFiltersContextCustomizer@351584c0, org.springframework.boot.test.autoconfigure.properties.PropertyMappingContextCustomizer@8b05feb1, org.springframework.boot.test.autoconfigure.web.servlet.WebDriverContextCustomizerFactory$Customizer@59505b48, org.springframework.boot.test.context.SpringBootTestArgs@1], contextLoader = 'org.springframework.boot.test.context.SpringBootContextLoader', parent = [null]], attributes = map[[empty]]]; transaction manager [org.springframework.orm.jpa.JpaTransactionManager@46a0ef6f]; rollback [true]
Hibernate: insert into tasks (id, title) values (null, ?)
2020-09-16 11:16:57.868 WARN 11406 --- [ main] o.h.a.i.UnresolvedEntityInsertActions : HHH000437: Attempting to save one or more entities that have a non-nullable association with an unsaved transient entity. The unsaved transient entity must be saved in an operation prior to saving these dependent entities.
Unsaved transient entity: ([TaskDao#<null>])
Dependent entities: ([[TagDao#<null>]])
Non-nullable association(s): ([TagDao.task])
2020-09-16 11:16:57.883 INFO 11406 --- [ main] o.s.t.c.transaction.TransactionContext : Rolled back transaction for test: [DefaultTestContext@5038d0b5 testClass = TaskEntityRepositoryIntegrationTests, testInstance = TaskEntityRepositoryIntegrationTests@1169afe1, testMethod = testRelationshipPersistence@TaskEntityRepositoryIntegrationTests, testException = org.springframework.dao.InvalidDataAccessApiUsageException: org.hibernate.TransientPropertyValueException: Not-null property references a transient value - transient instance must be saved before current operation : TagDao.task -> TaskDao; nested exception is java.lang.IllegalStateException: org.hibernate.TransientPropertyValueException: Not-null property references a transient value - transient instance must be saved before current operation : TagDao.task -> TaskDao, mergedContextConfiguration = [MergedContextConfiguration@32115b28 testClass = TaskEntityRepositoryIntegrationTests, locations = '{}', classes = '{class TasksApplication}', contextInitializerClasses = '[]', activeProfiles = '{}', propertySourceLocations = '{}', propertySourceProperties = '{org.springframework.boot.test.autoconfigure.orm.jpa.DataJpaTestContextBootstrapper=true}', contextCustomizers = set[[ImportsContextCustomizer@2ad48653 key = [org.springframework.boot.autoconfigure.cache.CacheAutoConfiguration, org.springframework.boot.autoconfigure.data.jpa.JpaRepositoriesAutoConfiguration, org.springframework.boot.autoconfigure.flyway.FlywayAutoConfiguration, org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration, org.springframework.boot.autoconfigure.jdbc.DataSourceTransactionManagerAutoConfiguration, org.springframework.boot.autoconfigure.jdbc.JdbcTemplateAutoConfiguration, org.springframework.boot.autoconfigure.liquibase.LiquibaseAutoConfiguration, org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaAutoConfiguration, org.springframework.boot.autoconfigure.transaction.TransactionAutoConfiguration, org.springframework.boot.test.autoconfigure.jdbc.TestDatabaseAutoConfiguration, org.springframework.boot.test.autoconfigure.orm.jpa.TestEntityManagerAutoConfiguration]], org.springframework.boot.test.context.filter.ExcludeFilterContextCustomizer@618425b5, org.springframework.boot.test.json.DuplicateJsonObjectContextCustomizerFactory$DuplicateJsonObjectContextCustomizer@f5acb9d, org.springframework.boot.test.mock.mockito.MockitoContextCustomizer@0, org.springframework.boot.test.autoconfigure.OverrideAutoConfigurationContextCustomizerFactory$DisableAutoConfigurationContextCustomizer@54bff557, org.springframework.boot.test.autoconfigure.filter.TypeExcludeFiltersContextCustomizer@351584c0, org.springframework.boot.test.autoconfigure.properties.PropertyMappingContextCustomizer@8b05feb1, org.springframework.boot.test.autoconfigure.web.servlet.WebDriverContextCustomizerFactory$Customizer@59505b48, org.springframework.boot.test.context.SpringBootTestArgs@1], contextLoader = 'org.springframework.boot.test.context.SpringBootContextLoader', parent = [null]], attributes = map[[empty]]]
org.springframework.dao.InvalidDataAccessApiUsageException: org.hibernate.TransientPropertyValueException: Not-null property references a transient value - transient instance must be saved before current operation : TagDao.task -> TaskDao; nested exception is java.lang.IllegalStateException: org.hibernate.TransientPropertyValueException: Not-null property references a transient value - transient instance must be saved before current operation : TagDao.task -> TaskDao
@Data
@Entity
@NoArgsConstructor
@AllArgsConstructor
@Table(name="tasks")
@Builder(toBuilder = true)
public class TaskDao implements Serializable {
private static final long serialVersionUID = -1128682442577176872L;
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
Long id;
@Column
String title;
@Singular
@OneToMany(mappedBy= "task", cascade = CascadeType.ALL)
Collection<TagDao> tags;
}
@Data
@Entity
@NoArgsConstructor
@AllArgsConstructor
@Table(name="tags")
@Builder(toBuilder = true)
public class TagDao implements Serializable {
private static final long serialVersionUID = -1128682442577176872L;
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
Long id;
@Column
String tag;
@ManyToOne(optional = false)
TaskDao task;
}
@Repository
public interface TaskEntityRepository extends JpaRepository<TaskDao, Long> {
}
如果我删除这些行，则保存成功，但断言失败，因为父端的关系为空
taskDao = taskDao.toBuilder()
.tag(tagDao)
.build();
2020-09-16 12:09:46.134 INFO 12078 --- [ main] o.s.t.c.transaction.TransactionContext : Began transaction (1) for test context [DefaultTestContext@18f8cd79 testClass = TaskEntityRepositoryIntegrationTests, testInstance = TaskEntityRepositoryIntegrationTests@33f676f6, testMethod = testRelationshipPersistence@TaskEntityRepositoryIntegrationTests, testException = [null], mergedContextConfiguration = [MergedContextConfiguration@3e2055d6 testClass = TaskEntityRepositoryIntegrationTests, locations = '{}', classes = '{class TasksApplication}', contextInitializerClasses = '[]', activeProfiles = '{}', propertySourceLocations = '{}', propertySourceProperties = '{org.springframework.boot.test.autoconfigure.orm.jpa.DataJpaTestContextBootstrapper=true}', contextCustomizers = set[[ImportsContextCustomizer@50029372 key = [org.springframework.boot.autoconfigure.cache.CacheAutoConfiguration, org.springframework.boot.autoconfigure.data.jpa.JpaRepositoriesAutoConfiguration, org.springframework.boot.autoconfigure.flyway.FlywayAutoConfiguration, org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration, org.springframework.boot.autoconfigure.jdbc.DataSourceTransactionManagerAutoConfiguration, org.springframework.boot.autoconfigure.jdbc.JdbcTemplateAutoConfiguration, org.springframework.boot.autoconfigure.liquibase.LiquibaseAutoConfiguration, org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaAutoConfiguration, org.springframework.boot.autoconfigure.transaction.TransactionAutoConfiguration, org.springframework.boot.test.autoconfigure.jdbc.TestDatabaseAutoConfiguration, org.springframework.boot.test.autoconfigure.orm.jpa.TestEntityManagerAutoConfiguration]], org.springframework.boot.test.context.filter.ExcludeFilterContextCustomizer@5acf93bb, org.springframework.boot.test.json.DuplicateJsonObjectContextCustomizerFactory$DuplicateJsonObjectContextCustomizer@614ca7df, org.springframework.boot.test.mock.mockito.MockitoContextCustomizer@0, org.springframework.boot.test.autoconfigure.OverrideAutoConfigurationContextCustomizerFactory$DisableAutoConfigurationContextCustomizer@6392827e, org.springframework.boot.test.autoconfigure.filter.TypeExcludeFiltersContextCustomizer@351584c0, org.springframework.boot.test.autoconfigure.properties.PropertyMappingContextCustomizer@8b05feb1, org.springframework.boot.test.autoconfigure.web.servlet.WebDriverContextCustomizerFactory$Customizer@2dc54ad4, org.springframework.boot.test.context.SpringBootTestArgs@1], contextLoader = 'org.springframework.boot.test.context.SpringBootContextLoader', parent = [null]], attributes = map[[empty]]]; transaction manager [org.springframework.orm.jpa.JpaTransactionManager@787a4519]; rollback [true]
Hibernate: insert into tasks (id, title) values (null, ?)
Hibernate: select taskdao0_.id as id1_3_, taskdao0_.title as title7_3_ from tasks taskdao0_
2020-09-16 12:09:46.828 INFO 12078 --- [ main] o.s.t.c.transaction.TransactionContext : Rolled back transaction for test: [DefaultTestContext@18f8cd79 testClass = TaskEntityRepositoryIntegrationTests, testInstance = TaskEntityRepositoryIntegrationTests@33f676f6, testMethod = testRelationshipPersistence@TaskEntityRepositoryIntegrationTests, testException = java.util.NoSuchElementException, mergedContextConfiguration = [MergedContextConfiguration@3e2055d6 testClass = TaskEntityRepositoryIntegrationTests, locations = '{}', classes = '{class TasksApplication}', contextInitializerClasses = '[]', activeProfiles = '{}', propertySourceLocations = '{}', propertySourceProperties = '{org.springframework.boot.test.autoconfigure.orm.jpa.DataJpaTestContextBootstrapper=true}', contextCustomizers = set[[ImportsContextCustomizer@50029372 key = [org.springframework.boot.autoconfigure.cache.CacheAutoConfiguration, org.springframework.boot.autoconfigure.data.jpa.JpaRepositoriesAutoConfiguration, org.springframework.boot.autoconfigure.flyway.FlywayAutoConfiguration, org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration, org.springframework.boot.autoconfigure.jdbc.DataSourceTransactionManagerAutoConfiguration, org.springframework.boot.autoconfigure.jdbc.JdbcTemplateAutoConfiguration, org.springframework.boot.autoconfigure.liquibase.LiquibaseAutoConfiguration, org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaAutoConfiguration, org.springframework.boot.autoconfigure.transaction.TransactionAutoConfiguration, org.springframework.boot.test.autoconfigure.jdbc.TestDatabaseAutoConfiguration, org.springframework.boot.test.autoconfigure.orm.jpa.TestEntityManagerAutoConfiguration]], org.springframework.boot.test.context.filter.ExcludeFilterContextCustomizer@5acf93bb, org.springframework.boot.test.json.DuplicateJsonObjectContextCustomizerFactory$DuplicateJsonObjectContextCustomizer@614ca7df, org.springframework.boot.test.mock.mockito.MockitoContextCustomizer@0, org.springframework.boot.test.autoconfigure.OverrideAutoConfigurationContextCustomizerFactory$DisableAutoConfigurationContextCustomizer@6392827e, org.springframework.boot.test.autoconfigure.filter.TypeExcludeFiltersContextCustomizer@351584c0, org.springframework.boot.test.autoconfigure.properties.PropertyMappingContextCustomizer@8b05feb1, org.springframework.boot.test.autoconfigure.web.servlet.WebDriverContextCustomizerFactory$Customizer@2dc54ad4, org.springframework.boot.test.context.SpringBootTestArgs@1], contextLoader = 'org.springframework.boot.test.context.SpringBootContextLoader', parent = [null]], attributes = map[[empty]]]
java.util.NoSuchElementException
at java.base/java.util.Collections$EmptyIterator.next(Collections.java:4277)
at org.hibernate.collection.internal.AbstractPersistentCollection$IteratorProxy.next(AbstractPersistentCollection.java:883)
at TaskEntityRepositoryIntegrationTests.testRelationshipPersistence(TaskEntityRepositoryIntegrationTests.java:98)
结果是 Lombok 构建器没有像我想的那样更新 Dao，而是替换它，然后导致 ORM 认为它是一个新对象