package com.ljq.entity;

import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.OneToOne;
import javax.persistence.Table;
/**
 * 身份证
 * 
 * @author jiqinlin
 *
 */
@Entity
@Table(name = "tb_idcard")
public class IDCard {
    @Id
    @GeneratedValue
    private Integer id;
    
    @Column(nullable = false, length = 18)
    private String cardno;
    
    //unique= true 指明personid列的值不可重复。
    //optional = false指明Person不可为空
    @OneToOne(cascade = CascadeType.ALL, optional = false)
    @JoinColumn(name = "personid",referencedColumnName="id", unique = true)
    private Person person;