问题描述
我正在尝试映射 Real_States:
CREATE TABLE REAL_STATES (
address VARCHAR(30) NOT NULL,admin_id VARCHAR(15) NOT NULL,real_state_type_id INT(6) NOT NULL,block VARCHAR(3) NOT NULL,internal_id INT(5) NOT NULL,PRIMARY KEY (address,block,internal_id),FOREIGN KEY (real_state_type_id) REFERENCES REAL_STATE_TYPES (real_state_type_id),FOREIGN KEY (admin_id) REFERENCES ADMINS (admin_id)
);
与居民相关:
CREATE TABLE RESIDENTS (
resident_id VARCHAR(15) NOT NULL,resident_name VARCHAR(20) NOT NULL,resident_last_name VARCHAR(20) NOT NULL,resident_phone_number VARCHAR(15) NOT NULL,address VARCHAR(30) NOT NULL,PRIMARY KEY (resident_id),FOREIGN KEY (address,internal_id) REFERENCES REAL_STATES (address,internal_id)
);
通过 Real_State 的实体:
@Entity
@Table(name = "real_states")
public class RealState implements Serializable{
private static final long serialVersionUID = 4033627448194380926L;
@EmbeddedId
private RealStateID realStateID;
@Column(name = "real_state_type_id")
@Enumerated(EnumType.ORDINAL)
private RealStateEnum realStateEnum;
@ManyToOne(cascade = CascadeType.ALL)
@JoinColumn(name = "admin_id",insertable = true)
private Admin admin;
@ManyToOne(cascade = CascadeType.ALL)
@JoinColumns({@JoinColumn(name="address",referencedColumnName = "address",insertable = false,updatable = false),@JoinColumn(name="block",referencedColumnName = "block",@JoinColumn(name="internal_id",referencedColumnName = "internal_id",updatable = false)})
private Resident resident;
带有组合键的嵌入实体:
@Embeddable
public class RealStateID implements Serializable{
private static final long serialVersionUID = 6485406412363395170L;
@Column(name = "address")
private String address;
@Column(name = "block")
private String block;
@Column(name = "internal_id")
private int internal_id;
和居民实体:
@Entity
@Table(name = "residents")
public class Resident implements Serializable {
private static final long serialVersionUID = -9052313410222202916L;
@Id
@Column(name = "resident_id")
private String resident_id;
@Column(name = "resident_name")
private String resident_name;
@Column(name = "resident_last_name")
private String resident_last_name;
@Column(name = "resident_phone_number")
private String resident_phone_number;
@Column(name = "address")
private String address;
@Column(name = "block")
private String block;
@Column(name = "internal_id")
private int internal_id;
@OnetoMany(mappedBy = "resident",fetch= FetchType.EAGER)
private List<RealState> realStates;
22:18:32,825 WARN [org.hibernate.tool.schema.internal.ExceptionHandlerLoggedImpl] (ServerService Thread Pool -- 79) GenerationTarget encountered exception accepting command : Error executing DDL "alter table real_states add constraint FKeggvad6claf4gvemna1xdk2tm foreign key (address,internal_id) references residents (address,internal_id)" via JDBC Statement: org.hibernate.tool.schema.spi.CommandAcceptanceException: Error executing DDL "alter table real_states add constraint FKeggvad6claf4gvemna1xdk2tm foreign key (address,internal_id)" via JDBC Statement
at org.hibernate@5.3.20.Final//org.hibernate.tool.schema.internal.exec.GenerationTargetToDatabase.accept(GenerationTargetToDatabase.java:67)
at org.hibernate@5.3.20.Final//org.hibernate.tool.schema.internal.AbstractSchemaMigrator.applysqlString(AbstractSchemaMigrator.java:559)
at org.hibernate@5.3.20.Final//org.hibernate.tool.schema.internal.AbstractSchemaMigrator.applysqlStrings(AbstractSchemaMigrator.java:504)
at org.hibernate@5.3.20.Final//org.hibernate.tool.schema.internal.AbstractSchemaMigrator.applyForeignKeys(AbstractSchemaMigrator.java:433)
at org.hibernate@5.3.20.Final//org.hibernate.tool.schema.internal.AbstractSchemaMigrator.performMigration(AbstractSchemaMigrator.java:249)
at org.hibernate@5.3.20.Final//org.hibernate.tool.schema.internal.AbstractSchemaMigrator.doMigration(AbstractSchemaMigrator.java:114)
at org.hibernate@5.3.20.Final//org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator.performDatabaseAction(SchemaManagementToolCoordinator.java:183)
at org.hibernate@5.3.20.Final//org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator.process(SchemaManagementToolCoordinator.java:72)
at org.hibernate@5.3.20.Final//org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:310)
at org.hibernate@5.3.20.Final//org.hibernate.boot.internal.SessionFactoryBuilderImpl.build(SessionFactoryBuilderImpl.java:467)
at org.hibernate@5.3.20.Final//org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:1250)
at org.hibernate.jipijapa-hibernate5-3@23.0.1.Final//org.jboss.as.jpa.hibernate5.TwoPhaseBootstrapImpl.build(TwoPhaseBootstrapImpl.java:44)
at org.jboss.as.jpa@23.0.1.Final//org.jboss.as.jpa.service.PersistenceUnitServiceImpl$1$1.run(PersistenceUnitServiceImpl.java:170)
at org.jboss.as.jpa@23.0.1.Final//org.jboss.as.jpa.service.PersistenceUnitServiceImpl$1$1.run(PersistenceUnitServiceImpl.java:128)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at org.wildfly.security.elytron-private@1.15.3.Final//org.wildfly.security.manager.WildFlySecurityManager.doChecked(WildFlySecurityManager.java:664)
at org.jboss.as.jpa@23.0.1.Final//org.jboss.as.jpa.service.PersistenceUnitServiceImpl$1.run(PersistenceUnitServiceImpl.java:213)
at org.jboss.threads@2.4.0.Final//org.jboss.threads.ContextClassLoaderSavingRunnable.run(ContextClassLoaderSavingRunnable.java:35)
at org.jboss.threads@2.4.0.Final//org.jboss.threads.EnhancedQueueExecutor.safeRun(EnhancedQueueExecutor.java:1990)
at org.jboss.threads@2.4.0.Final//org.jboss.threads.EnhancedQueueExecutor$ThreadBody.doRunTask(EnhancedQueueExecutor.java:1486)
at org.jboss.threads@2.4.0.Final//org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1377)
at java.base/java.lang.Thread.run(Thread.java:834)
at org.jboss.threads@2.4.0.Final//org.jboss.threads.JBossthread.run(JBossthread.java:513)
Caused by: java.sql.sqlIntegrityConstraintViolationException: Cannot add or update a child row: a foreign key constraint fails (`real_state`.`#sql-3e28_118`,CONSTRAINT `FKeggvad6claf4gvemna1xdk2tm` FOREIGN KEY (`address`,`block`,`internal_id`) REFERENCES `residents` (`address`,`internal_id`))
at com.MysqL@8.0.22//com.MysqL.cj.jdbc.exceptions.sqlError.createsqlException(sqlError.java:117)
at com.MysqL@8.0.22//com.MysqL.cj.jdbc.exceptions.sqlError.createsqlException(sqlError.java:97)
at com.MysqL@8.0.22//com.MysqL.cj.jdbc.exceptions.sqlExceptionsMapping.translateException(sqlExceptionsMapping.java:122)
at com.MysqL@8.0.22//com.MysqL.cj.jdbc.StatementImpl.executeInternal(StatementImpl.java:764)
at com.MysqL@8.0.22//com.MysqL.cj.jdbc.StatementImpl.execute(StatementImpl.java:648)
at org.jboss.ironjacamar.jdbcadapters@1.4.27.Final//org.jboss.jca.adapters.jdbc.WrappedStatement.execute(WrappedStatement.java:198)
at org.hibernate@5.3.20.Final//org.hibernate.tool.schema.internal.exec.GenerationTargetToDatabase.accept(GenerationTargetToDatabase.java:54)
... 22 more
在此之前,我收到一个错误,要求我实现“插入应该是假的,更新应该是假的”,这就是为什么我将这些语句添加到每个 @JoinColumn 注释中的原因,我真的是 JPA 的新手,所以我非常感谢任何可以指导我找出此问题背后原因的建议或帮助。
解决方法
如果您尝试保存或更新 realstates
,请确保将 resident
对象正确设置为 realstate
。错误日志显示保存 realstates
时存在外键冲突,这发生在 realstate 对象在保存时没有 resident
对象。
根据您的 RESIDENTS
表定义:
CREATE TABLE RESIDENTS (
-- ...
FOREIGN KEY (address,block,internal_id) REFERENCES REAL_STATES (address,internal_id)
);
Resident - RealState
关联的所有者端应在 Resident
实体中定义,如下所示:
@Entity
@Table(name = "residents")
public class Resident implements Serializable {
// ...
@ManyToOne
@JoinColumns({
@JoinColumn(name="address",referencedColumnName = "address"),@JoinColumn(name="block",referencedColumnName = "block"),@JoinColumn(name="internal_id",referencedColumnName = "internal_id")
})
private RealState realState;
}
然后是 mappedBy
实体中的 RealState
端。
@Entity
@Table(name = "real_states")
public class RealState implements Serializable {
// ...
@OneToMany(mappedBy = "realState",fetch= FetchType.EAGER,cascade = CascadeType.ALL)
private List<Resident> resident;
}