Question

我正在 JPA 上使用 Oracle NoSql 数据库（使用eclipselink api）。

我有两个类Person和Address，它们有一对多的关系。下面的代码段：

@Entity
@NoSql (dataFormat = DataFormatType.MAPPED)
public class Person implements Serializable {

    private static final long serialVersionUID = 1L;

    @Id
    @GeneratedValue
    @Field(name = "_id")
    private String id;

    private String firstName;

    private String lastName;

    @OneToMany(mappedBy = "person", cascade = CascadeType.ALL, fetch = FetchType.LAZY)
    private List<Address> addresses = new ArrayList<>();

和

@Entity
@NoSql (dataFormat = DataFormatType.MAPPED)
public class Address implements Serializable {

    private static final long serialVersionUID = 1L;

    @Id
    @GeneratedValue
    @Field(name = "_id")
    private String id;

    private String street;

    private String city;

    private String country;

    private Integer pincode;

    @JoinField(name = "PERSON_ID", referencedFieldName = "_id")
    @ManyToOne(optional = false, fetch = FetchType.LAZY)
    private Person person;

我的主要功能如下：

    EntityManagerFactory emf = Persistence.createEntityManagerFactory("TestPU");
    EntityManager em = emf.createEntityManager();
    EntityTransaction tx = em.getTransaction();

    try {
        tx.begin();

        Person p1 = new Person();
        p1.setFirstName("fn");
        p1.setLastName("ln");

        List<Address> addrList = new ArrayList<>();

        Address addr1 = new Address();
        addr1.setStreet("str");
        addr1.setCity("City");
        addr1.setCountry("Ctry");
        addr1.setPincode(123456);
        addrList.add(addr1);

        Address addr2 = new Address();
        addr2.setStreet("str2");
        addr2.setCity("City2");
        addr2.setCountry("Ctry2");
        addr2.setPincode(223456);
        addrList.add(addr2);

        p1.setAddresses(addrList);     
        em.persist(p1);
        tx.commit();

我的persistence.xml如下：

<persistence version="2.1" xmlns="http://xmlns.jcp.org/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd">
  <persistence-unit name="TestPU" transaction-type="RESOURCE_LOCAL">
    <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
        <exclude-unlisted-classes>false</exclude-unlisted-classes>
    <properties>
      <property name="eclipselink.target-database" value="org.eclipse.persistence.nosql.adapters.nosql.OracleNoSQLPlatform"/>
      <property name="eclipselink.nosql.connection-spec" value="org.eclipse.persistence.nosql.adapters.nosql.OracleNoSQLConnectionSpec"/>
      <property name="eclipselink.nosql.property.nosql.host" value="dockerHost:5002"/>
      <property name="eclipselink.nosql.property.nosql.store" value="camiantDBstore"/>
      <property name="eclipselink.logging.level" value="FINEST"/>
    </properties>
  </persistence-unit>
</persistence>

当我执行main方法时抛出异常：

javax.persistence.PersistenceException: Exception [EclipseLink-90000] (Eclipse Persistence Services - 2.6.4.v20160829-44060b6): org.eclipse.persistence.eis.EISException
Error Code: 000
Call: Executing MappedInteraction()
    spec => null
    properties => {nosql.operation=PUT_IF_ABSENT}
Internal Exception: javax.resource.ResourceException: java.lang.ClassCastException: java.lang.String cannot be cast to org.eclipse.persistence.internal.nosql.adapters.nosql.OracleNoSQLRecord
    input => [DatabaseRecord(
    PERSON.FIRSTNAME => fn
    PERSON.LASTNAME => ln
    PERSON.ID => F9A2D757-BA55-4218-BC8F-0D6304649AEC
Error Code: 000
Call: Executing MappedInteraction()
    PERSON.ADDRESSES_ID => [8E6F3B7F-C16E-4378-9BC7-7BBB2EBE5654, 638D01DA-6B06-4AB2-9E8B-F4A6DACA1D6C, B92A85D0-9161-4C35-8A44-C06C7C53E25F])]
    spec => null
Query: InsertObjectQuery(test.Person@5dda768f)
    properties => {nosql.operation=PUT_IF_ABSENT}
    input => [DatabaseRecord(
    PERSON.FIRSTNAME => fn
    PERSON.LASTNAME => ln
    PERSON.ID => F9A2D757-BA55-4218-BC8F-0D6304649AEC
    PERSON.ADDRESSES_ID => [8E6F3B7F-C16E-4378-9BC7-7BBB2EBE5654, 638D01DA-6B06-4AB2-9E8B-F4A6DACA1D6C, B92A85D0-9161-4C35-8A44-C06C7C53E25F])]
Query: InsertObjectQuery(test.Person@5dda768f)
    at org.eclipse.persistence.eis.EISException.resourceException(EISException.java:65)
    at org.eclipse.persistence.internal.jpa.EntityManagerImpl.flush(EntityManagerImpl.java:879)
    at testnosqljpa.TestNoSqlJPA.main(TestNoSqlJPA.java:60)
Caused by: Exception [EclipseLink-90000] (Eclipse Persistence Services - 2.6.4.v20160829-44060b6): org.eclipse.persistence.eis.EISException
    at org.eclipse.persistence.eis.EISException.resourceException(EISException.java:74)

但是，当我使用 @ Embedded / @ Embeddable 注释而不是 @OneToMany 关系注释时，我能够插入相同数据。

任何帮助表示感谢。

Answer 1

使用 @NoSql（dataFormat = DataFormatType.XML）

而不是

@NoSql（dataFormat = DataFormatType.MAPPED）

解决了这个问题。

Oracle NoSql DB中的JPA一对多关系 - 插入，OracleNoSQLRecord异常

1 个答案: