Java InvalidDataAccessApiUsageException:传递给持久化的分离实体

我正在使用JPA

在数据库中有建筑物和房间的桌子。他们有一个单一的关系

我可以将数据添加到建筑中，但当我尝试将数据添加到房间中时，会出现错误：

java.lang.IllegalStateException: Failed to execute CommandLineRunner
    at org.springframework.boot.SpringApplication.callRunner(SpringApplication.java:787) ~[spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE]
    at org.springframework.boot.SpringApplication.callRunners(SpringApplication.java:768) ~[spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:322) ~[spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) ~[spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215) ~[spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE]
    at vcs.hotelproject.aplication.HotelApp.main(HotelApp.java:24) ~[classes/:na]
Caused by: org.springframework.dao.InvalidDataAccessApiUsageException: detached entity passed to persist: vcs.hotelproject.aplication.Building; nested exception is org.hibernate.PersistentObjectException: detached entity passed to persist: vcs.hotelproject.aplication.Building
    at org.springframework.orm.jpa.vendor.HibernateJpaDialect.convertHibernateAccessException(HibernateJpaDialect.java:319) ~[spring-orm-5.2.4.RELEASE.jar:5.2.4.RELEASE]
    at org.springframework.orm.jpa.vendor.HibernateJpaDialect.translateExceptionIfPossible(HibernateJpaDialect.java:255) ~[spring-orm-5.2.4.RELEASE.jar:5.2.4.RELEASE]
    at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.translateExceptionIfPossible(AbstractEntityManagerFactoryBean.java:528) ~[spring-orm-5.2.4.RELEASE.jar:5.2.4.RELEASE]
    at org.springframework.dao.support.ChainedPersistenceExceptionTranslator.translateExceptionIfPossible(ChainedPersistenceExceptionTranslator.java:61) ~[spring-tx-5.2.4.RELEASE.jar:5.2.4.RELEASE]
    at org.springframework.dao.support.DataAccessUtils.translateIfNecessary(DataAccessUtils.java:242) ~[spring-tx-5.2.4.RELEASE.jar:5.2.4.RELEASE]
    at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:153) ~[spring-tx-5.2.4.RELEASE.jar:5.2.4.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.2.4.RELEASE.jar:5.2.4.RELEASE]
    at org.springframework.data.jpa.repository.support.CrudMethodMetadataPostProcessor$CrudMethodMetadataPopulatingMethodInterceptor.invoke(CrudMethodMetadataPostProcessor.java:178) ~[spring-data-jpa-2.2.5.RELEASE.jar:2.2.5.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.2.4.RELEASE.jar:5.2.4.RELEASE]
    at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:95) ~[spring-aop-5.2.4.RELEASE.jar:5.2.4.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.2.4.RELEASE.jar:5.2.4.RELEASE]
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:212) ~[spring-aop-5.2.4.RELEASE.jar:5.2.4.RELEASE]
    at com.sun.proxy.$Proxy81.save(Unknown Source) ~[na:na]
    at vcs.hotelproject.aplication.HotelApp.run(HotelApp.java:33) ~[classes/:na]
    at org.springframework.boot.SpringApplication.callRunner(SpringApplication.java:784) ~[spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE]
    ... 5 common frames omitted
Caused by: org.hibernate.PersistentObjectException: detached entity passed to persist: vcs.hotelproject.aplication.Building
    at org.hibernate.event.internal.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:120) ~[hibernate-core-5.4.12.Final.jar:5.4.12.Final]
    at org.hibernate.event.service.internal.EventListenerGroupImpl.fireEventOnEachListener(EventListenerGroupImpl.java:113) ~[hibernate-core-5.4.12.Final.jar:5.4.12.Final]
    at org.hibernate.internal.SessionImpl.firePersist(SessionImpl.java:734) ~[hibernate-core-5.4.12.Final.jar:5.4.12.Final]
    at org.hibernate.internal.SessionImpl.persist(SessionImpl.java:702) ~[hibernate-core-5.4.12.Final.jar:5.4.12.Final]
    at org.hibernate.engine.spi.CascadingActions$7.cascade(CascadingActions.java:298) ~[hibernate-core-5.4.12.Final.jar:5.4.12.Final]
    at org.hibernate.engine.internal.Cascade.cascadeToOne(Cascade.java:492) ~[hibernate-core-5.4.12.Final.jar:5.4.12.Final]
    at org.hibernate.engine.internal.Cascade.cascadeAssociation(Cascade.java:416) ~[hibernate-core-5.4.12.Final.jar:5.4.12.Final]
    at org.hibernate.engine.internal.Cascade.cascadeProperty(Cascade.java:218) ~[hibernate-core-5.4.12.Final.jar:5.4.12.Final]
    at org.hibernate.engine.internal.Cascade.cascade(Cascade.java:151) ~[hibernate-core-5.4.12.Final.jar:5.4.12.Final]
    at org.hibernate.event.internal.AbstractSaveEventListener.cascadeBeforeSave(AbstractSaveEventListener.java:427) ~[hibernate-core-5.4.12.Final.jar:5.4.12.Final]
    at org.hibernate.event.internal.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:264) ~[hibernate-core-5.4.12.Final.jar:5.4.12.Final]
    at org.hibernate.event.internal.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:193) ~[hibernate-core-5.4.12.Final.jar:5.4.12.Final]
    at org.hibernate.event.internal.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:123) ~[hibernate-core-5.4.12.Final.jar:5.4.12.Final]
    at org.hibernate.event.internal.DefaultPersistEventListener.entityIsTransient(DefaultPersistEventListener.java:185) ~[hibernate-core-5.4.12.Final.jar:5.4.12.Final]
    at org.hibernate.event.internal.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:128) ~[hibernate-core-5.4.12.Final.jar:5.4.12.Final]
    at org.hibernate.event.internal.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:55) ~[hibernate-core-5.4.12.Final.jar:5.4.12.Final]
    at org.hibernate.event.service.internal.EventListenerGroupImpl.fireEventOnEachListener(EventListenerGroupImpl.java:102) ~[hibernate-core-5.4.12.Final.jar:5.4.12.Final]
    at org.hibernate.internal.SessionImpl.firePersist(SessionImpl.java:710) ~[hibernate-core-5.4.12.Final.jar:5.4.12.Final]
    at org.hibernate.internal.SessionImpl.persist(SessionImpl.java:696) ~[hibernate-core-5.4.12.Final.jar:5.4.12.Final]
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na]
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
    at java.base/java.lang.reflect.Method.invoke(Method.java:567) ~[na:na]
    at org.springframework.orm.jpa.SharedEntityManagerCreator$SharedEntityManagerInvocationHandler.invoke(SharedEntityManagerCreator.java:314) ~[spring-orm-5.2.4.RELEASE.jar:5.2.4.RELEASE]
    at com.sun.proxy.$Proxy66.persist(Unknown Source) ~[na:na]
    at org.springframework.data.jpa.repository.support.SimpleJpaRepository.save(SimpleJpaRepository.java:554) ~[spring-data-jpa-2.2.5.RELEASE.jar:2.2.5.RELEASE]
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na]
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
    at java.base/java.lang.reflect.Method.invoke(Method.java:567) ~[na:na]
    at org.springframework.data.repository.core.support.RepositoryComposition$RepositoryFragments.invoke(RepositoryComposition.java:371) ~[spring-data-commons-2.2.5.RELEASE.jar:2.2.5.RELEASE]
    at org.springframework.data.repository.core.support.RepositoryComposition.invoke(RepositoryComposition.java:204) ~[spring-data-commons-2.2.5.RELEASE.jar:2.2.5.RELEASE]
    at org.springframework.data.repository.core.support.RepositoryFactorySupport$ImplementationMethodExecutionInterceptor.invoke(RepositoryFactorySupport.java:657) ~[spring-data-commons-2.2.5.RELEASE.jar:2.2.5.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.2.4.RELEASE.jar:5.2.4.RELEASE]
    at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.doInvoke(RepositoryFactorySupport.java:621) ~[spring-data-commons-2.2.5.RELEASE.jar:2.2.5.RELEASE]
    at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.invoke(RepositoryFactorySupport.java:605) ~[spring-data-commons-2.2.5.RELEASE.jar:2.2.5.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.2.4.RELEASE.jar:5.2.4.RELEASE]
    at org.springframework.data.projection.DefaultMethodInvokingMethodInterceptor.invoke(DefaultMethodInvokingMethodInterceptor.java:80) ~[spring-data-commons-2.2.5.RELEASE.jar:2.2.5.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.2.4.RELEASE.jar:5.2.4.RELEASE]
    at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:366) ~[spring-tx-5.2.4.RELEASE.jar:5.2.4.RELEASE]
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:99) ~[spring-tx-5.2.4.RELEASE.jar:5.2.4.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.2.4.RELEASE.jar:5.2.4.RELEASE]
    at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:139) ~[spring-tx-5.2.4.RELEASE.jar:5.2.4.RELEASE]
    ... 14 common frames omitted

我的建筑模型：

@Entity
@Table(name = "building")
public class Building {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private int buildingID;
    @NotNull
    private String address;
    @NotNull
    private String city;
    @NotNull
    private String buildingType;

    @OneToMany(targetEntity = Room.class, fetch = FetchType.LAZY, mappedBy = "building", cascade = CascadeType.ALL)
    private List<Room> rooms;

    public List<Room> getRooms() {
        return rooms;
    }

    public void setRooms(List<Room> rooms) {
        this.rooms = rooms;
    }

    public int getBuildingID() {
        return buildingID;
    }

    public void setBuildingID(int buildingID) {
        this.buildingID = buildingID;
    }

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }

    public String getCity() {
        return city;
    }

    public void setCity(String city) {
        this.city = city;
    }

    public String getBuildingType() {
        return buildingType;
    }

    public void setBuildingType(String buildingType) {
        this.buildingType = buildingType;
    }

    protected Building(String address, String city, String buildingType) {
        super();
        this.address = address;
        this.city = city;
        this.buildingType = buildingType;
    }

    protected Building() {
        super();
    }

//bidirectional
    public void addRoom(Room tempRoom) {
        if (!rooms.contains(tempRoom)) {
            rooms.add(tempRoom);
            tempRoom.setBuilding(this);
        }

    }
}

我的主应用程序。在这里，我获取建筑对象并将其传递到房间：

@SpringBootApplication
@EnableJpaRepositories
public class HotelApp implements CommandLineRunner {

    public static void main(String[] args) {

        SpringApplication.run(HotelApp.class, args);
    }

    public void run(String... args) throws Exception {
        int id = 1;
        Building b = buildingRepository.getBuildingByID(id);
        // Client b = clientRepository.getClientByID(1);
        // System.out.println(b.getFirstName());

        roomRepository.save(new Room(b, "189", "Luxury"));
    }
}

---

请帮忙。

找到了答案

在

Room.class

中，我刚刚删除了级联类型，只剩下

CascadeType.MERGE

---

现在它可以根据需要工作。

找到了答案

在

Room.class

中，我刚刚删除了级联类型，只剩下

CascadeType.MERGE

---

现在它可以根据需要工作。

你救了我的命。你救了我的命。

@SpringBootApplication
@EnableJpaRepositories
public class HotelApp implements CommandLineRunner {

    public static void main(String[] args) {

        SpringApplication.run(HotelApp.class, args);
    }

    public void run(String... args) throws Exception {
        int id = 1;
        Building b = buildingRepository.getBuildingByID(id);
        // Client b = clientRepository.getClientByID(1);
        // System.out.println(b.getFirstName());

        roomRepository.save(new Room(b, "189", "Luxury"));
    }
}