Java 使用EntityManager.getReference（）和自然键
我有两种实体类型Log和LogType，定义如下：Java 使用EntityManager.getReference（）和自然键,java,jpa,Java,Jpa,我有两种实体类型Log和LogType，定义如下： public class LogType { @Id @NotNull private Short id; @Size(max = 30) @Column(name = "LOG_TYPE") private String type; /* More fields, getters and setters */ } public class Log { @Id @NotNull
public class LogType {
@Id @NotNull
private Short id;
@Size(max = 30) @Column(name = "LOG_TYPE")
private String type;
/* More fields, getters and setters */
}
public class Log {
@Id @NotNull
private Long id;
@JoinColumn(name = "LOG_TYPE_ID", referencedColumnName = "LOG_TYPE")
@ManyToOne(optional = false)
private LogType type;
/* More fields, getters and setters */
}