我有两类团队和用户:
@Entity
@Table(name = "team")
@Cache(usage = CacheConcurrencyStrategy.NONSTRICT_READ_WRITE)
public class Team extends AbstractAuditingEntity implements Serializable, Participant {
private static final long serialVersionUID = 1L;
@Id
@GeneratedValue(strategy = Genera
我刚开始从事基于spring的项目,我需要用OneToMany创建订单和发票之间的实体关系映射,并尝试了下面的映射,但最后出现了映射错误,请您指出此问题。
@Entity
@Table(name="Customers")
public class Customers implements Serializable {
private static final long serialVersionUID = 1L;
@Id
@GenericGenerator(name = "generator", strategy = "in
@MappedSuperclass
public abstract class AbstractBaseModel{ }
@MappedSuperclass
public class Person extends AbstractBaseModel { }
@Entity
public class APerson extends Person { }
@Entity
public class BPerson extends Person { }
@Entity
public class Course extends AbstractBaseModel {
@ManyToOne
考虑以下实体。我打算让Child类引用两个派生的食品类(本地食品或外国食品)中的任何一个。这是一个人为设计的示例,我的真实域对象非常复杂,因此组合和使用FoodType列并不是一个可行的选择,因为这两个Foot子类只是在一些特征上相似。
@MappedSuperclass
public abstract class Food {
}
@Entity
public class LocalFood extends Food {
private long id;
private String name;
}
@Entity
public class ForeignFood extend
我有一个类似这样的类:
@Entity
public class EdgeInnovation {
@Id
public long id;
@ManyToOne
public NodeInnovation destination;
@ManyToOne
public NodeInnovation origin;
}
另一个看起来像这样的:
@Entity
public class NodeInnovation {
@Id
public long id;
@OneToOne
public EdgeInnovation
我试图理解两个实体之间的OneToOne映射。
我无法理解如何在mappedBy中指定OneToOne属性,使其成为双向关系。
UserID可嵌入类型:
@Embeddable
public class UserID implements Serializable {
private static final long serialVersionUID = 1L;
private int ssnID;
private int uniqueNum;
// getters and setters..
}
VehicleID可嵌入类型:
@Embeddable
p
我犯了个错误
my.backend.dataObject.PayMaster.PayTransactionStatement : mappedBy引用未知目标实体属性: my.backend.dataObject.PayTransactionStatement.payMaster.中的org.hibernate.AnnotationException
我检查了所有的实体,但仍然不能解决问题
@Data
@Entity
@Table(name = "pay_master")
@DynamicUpdate //Dynamic update - you need to set
我有两个实体,一个在内存数据库的H2中,另一个在SQL Server中,我需要映射一个OneToMany。当我这样做时,收到这个错误:"caused by: org.hibernate.AnnotationException:@OneToOne or @ManyToOne on ENTITY-1 references an unknown entity: ENTITY-2“。 Entity-1
@OneToMany(mappedBy = "entity1")
private Set<Entity2> entity2;
public Se
我得到了这个错误:
ERROR org.springframework.web.context.ContextLoader - Context initialization failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'transactionManager' defined in file [C:\Users\Tecnico1\Documents\workspace-sts-3.2.0.RELEASE\.metadata\.plugin
我是JPA的新手。我有一个我认为非常简单的例子,但我在实现它时遇到了困难。基本上,我有一个实体,我想在其他实体中“重用”。
我有一个User,有两个字段-- Home和Office。其中每一个依次引用一个Address,如下所示:
@Entity
public class User extends Model {
@Column
private String name;
@OneToOne
private Home home;
@OneToOne
private Office office;
}
@Entity
public clas