Hibernate試圖在春季刪除外鍵行

Question

我正在嘗試使用spring hibernate / jpa中的crudRepository delete操作從數據庫中刪除實體。 實體（用戶）與另一個實體（組織）具有@OnetoMany關系。 刪除用戶時，它還會嘗試刪除與組織表中的外鍵相對應的行，這時將引發錯誤。

我不想刪除組織表中的行，而只想刪除用戶userRepository.delete(createdUser); 。 誰能告訴我為什么這沒有按預期進行？

User.java

/**
 * The user's organisation
 */
@NotNull
@SerializedName("organisation")
@Expose
@ManyToOne
@JoinColumn(name = "organisation_id")
private Organisation organisation;

Organisation.java

/**
 * The organisation's domain name
 */
@NotNull
private String domainName;

@OneToMany(mappedBy = "organisation")
private Set<User> users;

UserServiceTest

@Test
public void create_SaveUserNewEntryToDatabase_ShouldReturnSingleUser() throws UserExistsException {
    long numberOfDbEntries = userRepository.count();
    User newUser = new User("jane@ibmtest.com", "Jane", "Claire", "Jones", new Long(98765), new Long(54321));
    User createdUser = userService.create(newUser);

    assertNotNull(createdUser);
    assertEquals(numberOfDbEntries+1, userRepository.count());
    assertEquals(createdUser.getFirstName(), "Jane");
    assertEquals(createdUser.getMiddleName(), "Claire");
    assertEquals(createdUser.getLastName(), "Jones");
    assertEquals(createdUser.getEmail(), "jane@ibmtest.com");
    assertEquals(createdUser.getOrganisation(), new Long(98765));
    assertEquals(createdUser.getUserRole(), new Long(54321));

    userRepository.delete(createdUser);  <------
    assertEquals(numberOfDbEntries, userRepository.count());
}

堆棧跟蹤

org.dbunit.DatabaseUnitException: Exception processing table name='user'
    at org.dbunit.operation.AbstractBatchOperation.execute(AbstractBatchOperation.java:232)
    at com.github.springtestdbunit.DbUnitRunner.setupOrTeardown(DbUnitRunner.java:194)
    at com.github.springtestdbunit.DbUnitRunner.beforeTestMethod(DbUnitRunner.java:66)
    at com.github.springtestdbunit.DbUnitTestExecutionListener.beforeTestMethod(DbUnitTestExecutionListener.java:186)
    at org.springframework.test.context.TestContextManager.beforeTestMethod(TestContextManager.java:265)
    at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:74)
    at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86)
    at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:254)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:89)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
    at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
    at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:193)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Cannot add or update a child row: a foreign key constraint fails (`watchmaker_db`.`user`, CONSTRAINT `FK_t2c7mdyen6pg5d1hpwyw6ox4e` FOREIGN KEY (`organisation_id`) REFERENCES `organisation` (`id`))
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:422)
    at com.mysql.jdbc.Util.handleNewInstance(Util.java:404)
    at com.mysql.jdbc.Util.getInstance(Util.java:387)
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:932)
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3878)
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3814)
    at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2478)
    at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2625)
    at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2551)
    at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1861)
    at com.mysql.jdbc.PreparedStatement.execute(PreparedStatement.java:1192)
    at org.dbunit.database.statement.SimplePreparedStatement.addBatch(SimplePreparedStatement.java:80)
    at org.dbunit.database.statement.AutomaticPreparedBatchStatement.addBatch(AutomaticPreparedBatchStatement.java:70)
    at org.dbunit.operation.AbstractBatchOperation.execute(AbstractBatchOperation.java:214)
    ... 25 more

Answer 1

好吧，我希望測試能夠正常工作，因為您正在使用foreign key 。 我在具有約束的HSQLDB上嘗試工作時，因此我不確定那里發生了什么。 直接與Organization POJO一起嘗試。 從其中刪除User並重新保存Organization 。

Organization o =organizationRepository.findAll().iterator().next();
o.getUsers().remove(0);
organizationRepository.save(o);

編輯：也許您有一些手動SQL插入您的設置中失敗，然后再進行測試。