Spring数据MongoDB。生成ID的错误

Question

我做了一个实验...两个Spring数据存储库的一个公共实体：-jpa-mongoDB

首先,我使用以下库版本：

发布spring-data-jpa:1.7.0.发布spring-data-mongodb:1.6.0.发布

@Entity
@Table(name = "ACCOUNTS")
public class Account {

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    @Column(name = "ACCOUNT_ID")
    private Long id;

    @Column(name = "ACCOUNT_NUMBER")
    private String number;

    public Account() {
    }

    public Account(String number) {
        this.number = number;
    }

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public String getNumber() {
        return number;
    }

    public void setNumber(String number) {
        this.number = number;
    }
}

public interface Repository extends CrudRepository<Account, Long> {
    public Account findByNumber(String number);
}

public interface Repository extends CrudRepository<Account, Long> {
}

org.springframework.dao.InvalidDataAccessApiUsageException: Cannot autogenerate id of type java.lang.Long for entity of type ua.home.springdata.investigation.entity.Account!
    at org.springframework.data.mongodb.core.MongoTemplate.assertUpdateableIdIfNotSet(MongoTemplate.java:1149)
    at org.springframework.data.mongodb.core.MongoTemplate.doSave(MongoTemplate.java:878)
    at org.springframework.data.mongodb.core.MongoTemplate.save(MongoTemplate.java:833)
    at org.springframework.data.mongodb.repository.support.SimpleMongoRepository.save(SimpleMongoRepository.java:73)
    at org.springframework.data.mongodb.repository.support.SimpleMongoRepository.save(SimpleMongoRepository.java:88)
    at org.springframework.data.mongodb.repository.support.SimpleMongoRepository.save(SimpleMongoRepository.java:45)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.executeMethodOn(RepositoryFactorySupport.java:442)
    at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.doInvoke(RepositoryFactorySupport.java:427)
    at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.invoke(RepositoryFactorySupport.java:381)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207)
    at com.sun.proxy.$Proxy26.save(Unknown Source)

我觉得这是个很普通的案子。为什么Spring数据不能生成一样长的实体id？太奇怪了。

Answer 1

  @Id
  @Field("_id")
  @JsonIgnore
  private String id;

  @Field("my_object_id")
  private Long myObjectId;