Java 在实体声明中使用Hibernate OGM和MongoDB时出现异常
我无法使用Hibernate OGM和mongoDB初始化我的EntityManagerFactory,我遇到以下异常:Java 在实体声明中使用Hibernate OGM和MongoDB时出现异常,java,mongodb,kotlin,persistence,hibernate-ogm,Java,Mongodb,Kotlin,Persistence,Hibernate Ogm,我无法使用Hibernate OGM和mongoDB初始化我的EntityManagerFactory,我遇到以下异常: Exception in thread "main" java.lang.ExceptionInInitializerError at model.DBManager.initEntityManagerFactory(DBManager.kt:11) at controller.restapi.RestapiApplicationKt.main(Res
Exception in thread "main" java.lang.ExceptionInInitializerError
at model.DBManager.initEntityManagerFactory(DBManager.kt:11)
at controller.restapi.RestapiApplicationKt.main(RestapiApplication.kt:13)
Caused by: javax.persistence.PersistenceException: [PersistenceUnit: myPersistenceConfig] Unable to build Hibernate SessionFactory
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.persistenceException(EntityManagerFactoryBuilderImpl.java:970)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:895)
at org.hibernate.jpa.HibernatePersistenceProvider.createEntityManagerFactory(HibernatePersistenceProvider.java:58)
at org.hibernate.ogm.jpa.HibernateOgmPersistence.createEntityManagerFactory(HibernateOgmPersistence.java:57)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:55)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:39)
at model.util.HibernateOGMUtil.<clinit>(HibernateOGMUtil.kt:15)
... 2 more
Caused by: org.hibernate.MappingException: Could not determine type for: applicationdatamodel.sleep.SleepLevels, at table: Sleep, for columns: [org.hibernate.mapping.Column(levels)]
at org.hibernate.mapping.SimpleValue.getType(SimpleValue.java:456)
at org.hibernate.mapping.Property.getType(Property.java:69)
at org.hibernate.jpa.event.spi.JpaIntegrator.integrate(JpaIntegrator.java:150)
at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:281)
at org.hibernate.ogm.boot.impl.OgmSessionFactoryBuilderImpl.build(OgmSessionFactoryBuilderImpl.java:55)
at org.hibernate.ogm.boot.impl.OgmSessionFactoryBuilderImpl.build(OgmSessionFactoryBuilderImpl.java:23)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:892)
class HibernateOGMUtil {
companion object {
private lateinit var entityManagerFactory: EntityManagerFactory
init {
try{
entityManagerFactory = Persistence.createEntityManagerFactory("myPersistenceConfig")
}catch (e:Exception){
println(System.err.println("Initial EntityManagerFactory creation failed." + e))
}
}
fun getEntityManagerFactory(): EntityManagerFactory{
return entityManagerFactory
}
}
}
另一方面,我尝试从下一个实体中删除属性“levels”,然后,就没有例外了,持久性也可以工作。所以我认为这个属性有问题。也许我应该添加一个特别的注释,但我真的被这个问题困住了
这是我的密码:
import applicationdatamodel.sleep.SleepLevels
import org.hibernate.annotations.Type
import java.util.*
import javax.persistence.*
@Entity
data class Sleep (
@Temporal(TemporalType.TIMESTAMP) val dateOfSleep: Date,
val user_cif: String,
val duration: Int,
@Temporal(TemporalType.TIMESTAMP) val startTime: Date,
@Temporal(TemporalType.TIMESTAMP) val endTime: Date,
val minutesAsleep: Int,
val minutesAwake: Int,
val levels: SleepLevels
){
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Type(type = "objectid")
private lateinit var id: String
}
我非常感谢您的帮助。导致此问题的列是:
val levels:SleepLevels
Hibernate不知道如何在数据库上映射这个类(我假设它不是枚举)。
这意味着您需要将其映射为:
@embedded
和@embedded
注释李>
@OneToOne
或@ManyToOne
注释由于不知道您的模型的详细信息,我无法为您提供更多帮助,但您应该能够在官方hibernate文档中找到所需的所有详细信息。异常似乎与您发布的代码无关?你为什么不把代码贴在异常发生的地方?@Strelok我已经编辑过了。你是对的!希望现在更好。谢谢。您能否创建一个小项目作为示例,并将其发布到某个地方,以便我们可以重新创建错误?错误可能在配置中。您没有看到完整的异常。删除try-catch子句,以便获得hibernate异常的完整堆栈跟踪。