关于Hibernate 一对一单向外键关联

Question

本萌新在设置完hibernate单向外键关联以后，主表的外键是空的，用powerdesign生成逆向工程，又可以看到两个表示有关系的
不知道为啥，求高手解答

以下是代码
Husband 类(外键关联wife表的wid，主键为id）

@Entity
public class Husband {

private String id;
private String name;
private int age;
private Wife wife;


@Id
@GenericGenerator(name="idGenerator",strategy="uuid")
@GeneratedValue(generator="idGenerator")
public String getId() {
    return id;
}
public void setId(String id) {
    this.id = id;
}
public String getName() {
    return name;
}
public void setName(String name) {
    this.name = name;
}
public int getAge() {
    return age;
}
public void setAge(int age) {
    this.age = age;
}

@OneToOne(cascade = CascadeType.ALL,fetch = FetchType.EAGER) 
@JoinColumn(name = "wife_id")
public Wife getWife() {
    return wife;
}
public void setWife(Wife wife) {
    this.wife = wife;
}

}

Wife类
@Entity
public class Wife {

private String wid;
private int salary;

@Id
@GenericGenerator(name="idGenerator",strategy="uuid")
@GeneratedValue(generator="idGenerator")
public String getWid() {
    return wid;
}
public void setWid(String wid) {
    this.wid = wid;
}
public int getSalary() {
    return salary;
}
public void setSalary(int salary) {
    this.salary = salary;
}

}

数据库截图

Answer 1

就是想问一下大佬们 为什么Husband的外键wife_id 是空值？？？