我试图在这两个实体之间使用多对多关系 .
@Entity
data class Course(
@Id
@GeneratedValue
var id: Long = 0,
var name: String,
var lectures: Int,
@JsonIgnore
@JoinTable(name = "CourseStudent",
joinColumns = arrayOf(JoinColumn(name = "courseId", referencedColumnName = "id")),
inverseJoinColumns = arrayOf(JoinColumn(name = "studentId", referencedColumnName = "id"))
)
val enrolled: List<User> = emptyList()
)
@Entity
data class User(
@Id
@GeneratedValue
var id: Long = 0,
var username: String,
var password: String,
@ManyToMany(mappedBy = "enrolled")
val courses: List<Course> = emptyList()
)
但我总是得到这个例外：
org.springframework.beans.factory.BeanCreationException：在类路径资源[org / springframework / boot / autoconfigure / orm / jpa / HibernateJpaConfiguration.class]中定义名称为'entityManagerFactory'的bean创建错误：init方法的调用失败;嵌套异常是javax.persistence.PersistenceException：[PersistenceUnit：default]无法在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean（AbstractAutowireCapableBeanFactory.java:1710）〜[spring-beans-5.0.2]中构建Hibernate SessionFactory . RELEASE.jar：5.0.2.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean（AbstractAutowireCapableBeanFactory.java:583）〜[spring-beans-5.0.2.RELEASE.jar：5.0.2.RELEASE在Org.springframework.beans.factory的org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean（AbstractAutowireCapableBeanFactory.java:502）〜[spring-beans-5.0.2.RELEASE.jar：5.0.2.RELEASE] .support.AbstractBeanFactory.lambda $ doGetBean $ 0（AbstractBeanFactory.java:312）〜[spring-beans-5.0.2.RELEASE.jar：5.0.2.RELEASE] org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton （DefaultSingletonBeanRegistry.java:228)~ [spring-beans-5.0.2.RELE ASE.jar：5.0.2.RELEASE]在org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean（AbstractBeanFactory.java:310）〜[spring-beans-5.0.2.RELEASE.jar：5.0.2.RELEASE在Org.springframework.context.support的org.springframework.beans.factory.support.AbstractBeanFactory.getBean（AbstractBeanFactory.java:200）〜[spring-beans-5.0.2.RELEASE.jar：5.0.2.RELEASE] .AbstractApplicationContext.getBean（AbstractApplicationContext.java:1085）〜[spring-context-5.0.2.RELEASE.jar：5.0.2.RELEASE] at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization（AbstractApplicationContext.java:858） 〜[spring-context-5.0.2.RELEASE.jar：5.0.2.RELEASE]在org.springframework.context.support.AbstractApplicationContext.refresh（AbstractApplicationContext.java:549）〜[spring-context-5.0.2.RELEASE .jar：5.0.2.RELEASE]在org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh（ServletWebServerApplicationContext.java:138）〜[spring-boot-2.0.0.M7.jar：2 . 0.0.M7] org.springframework.boot.SpringApplication.refresh（SpringApplication.java:751）[spring-boot-2.0.0.M7.jar：2.0.0.M7] org.springframework.boot.SpringApplication.refreshContext （SpringApplication.java:387）[spring-boot-2.0.0.M7.jar：2.0.0.M7]在org.springframework.boot.SpringApplication.run（SpringApplication.java:327）[spring-boot-2.0 . 0.M7.jar：2.0.0.M7] org.springframework.boot.SpringApplication.run（SpringApplication.java:1245）[spring-boot-2.0.0.M7.jar：2.0.0.M7] at org .springframework.boot.SpringApplication.run（SpringApplication.java:1233）[spring-boot-2.0.0.M7.jar：2.0.0.M7] at com.authentication.auth.AuthApplicationKt.main（AuthApplication.kt：25 ）[classes /：na]引起：javax.persistence.PersistenceException：[PersistenceUnit：default]无法在org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.persistenceException（EntityManagerFactoryBuilderImpl.java:967）〜[hibernate]构建Hibernate SessionFactory orcore.hibernate.jpa中的-core-5.2.12.Final.jar：5.2.12.Final] . 在org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider.createContainerEntityManagerFactory（SpringHibernateJpaPersistenceProvider .java：57）〜[spring-orm-5.0.2.RELEASE.jar：5.0.2.RELEASE] org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory（LocalContainerEntityManagerFactoryBean.java:365）〜[spring-orm- 5.0.2.RELEASE.jar：5.0.2.RELEASE]在org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory（AbstractEntityManagerFactoryBean.java:387）〜[spring-orm-5.0.2.RELEASE.jar：5.0.2 .RELEASE] org.springframework.orm.jpa上的org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet（AbstractEntityManagerFactoryBean.java:376)~ [spring-orm-5.0.2.RELEASE.jar：5.0.2.RELEASE] .LocalContainerEntityManagerFactoryBean.afterPropertiesSet（LocalCont ainerEntityManagerFactoryBean.java:341）〜[spring-orm-5.0.2.RELEASE.jar：5.0.2.RELEASE] org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods（AbstractAutowireCapableBeanFactory.java:1769)~ [spring-beans-5.0.2 .RELEASE.jar：5.0.2.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean（AbstractAutowireCapableBeanFactory.java:1706)~ [spring-beans-5.0.2.RELEASE.jar：5.0.2 . RELEASE] ...省略了16个常见帧引起：org.hibernate.MappingException：无法确定类型：java.util.List，在表：当然，对于列：[org.hibernate.mapping.Column（已注册）] org.hibernate.mapping.SimpleValue.getType（SimpleValue.java:455）〜[hibernate-core-5.2.12.Final.jar：5.2.12.Final] at org.hibernate.mapping.SimpleValue.isValid（SimpleValue . java：422）〜[hibernate-core-5.2.12.Final.jar：5.2.12.Final] org.hibernate.mapping.Property.isValid（Property.java:226)~ [hibernate-core-5.2.12 .Final.jar：5.2.12.Final]在org.hibernate.mapping.PersistentClass.val在org.hibernate.mapping.RootClass.validate（RootClass.java:265）〜[hibernate-core -5.2.12.Final.jar:5.2.12.Final] at org.hibernate.boot.internal.MetadataImpl.validate（MetadataImpl.java:329)~ [hibernate-core-5.2.12.Final.jar：5.2 . 12.Final]在org.hibernate.jpa的org.hibernate.boot.internal.SessionFactoryBuilderImpl.build（SessionFactoryBuilderImpl.java:451）〜[hibernate-core-5.2.12.Final.jar：5.2.12.Final] . boot.internal.EntityManagerFactoryBuilderImpl.build（EntityManagerFactoryBuilderImpl.java:889)~ [hibernate-core-5.2.12.Final.jar：5.2.12.Final] ...省略了23个常用帧
我已经 ：
- 试图从类声明中删除"data"关键字
- 尝试声明如下字段：MutableList = mutableListOf（）
- 尝试使用和不使用"referencedColumnName"属性
我目前正在使用hsqldb