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delete option of cascade in Hibernate one-to-one association

Jacques Yang
Posts: 1
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I am not able to delete the corresponding one-to-one relation row using delete option of cascade. Here are the code for my class and Mappings.

Code For Class.
public class User {
private Integer uid;
private String username;
private String password;
private UserInf inf;
public UserInf getInf() {
return inf;
public void setInf(UserInf inf) {
this.inf = inf;
public String getUsername() {
return username;
public void setUsername(String username) {
this.username = username;
public Integer getUid() {
return uid;
public void setUid(Integer uid) {
this.uid = uid;
public String getPassword() {
return password;
public void setPassword(String password) {
this.password = password;

Code for UserInf .java Class

public class UserInf {
private int iid;
private String name;
private String email;
private User user;

public int getIid() {
return iid;
public void setIid(int iid) {
this.iid = iid;
public String getName() {
return name;
public void setName(String name) { = name;
public String getEmail() {
return email;
public void setEmail(String email) { = email;
public User getUser() {
return user;
public void setUser(User user) {
this.user = user;

mapping -- User.hbm.xml

<class name="com.developeryang.domain.User" table="USER">
<id name="uid" type="java.lang.Integer">
<column name="UID" />
<generator class="native" />
<property name="username" type="java.lang.String">
<column name="USERNAME" />
<property name="password" type="java.lang.String">
<column name="PASSWORD" />
<one-to-one name="inf" class="com.developeryang.domain.UserInf" cascade="save-update, delete-orphan"></one-to-one>

mapping -- UserInf.hbm.xml

<class name="com.developeryang.domain.UserInf" table="USERINF">
<id name="iid" type="int">
<column name="IID" />
<generator class="foreign">
<param name="property">user</param>
<property name="name" type="java.lang.String">
<column name="NAME" />
<property name="email" type="java.lang.String">
<column name="EMAIL" />
<one-to-one name="user" class="com.developeryang.domain.User" constrained="true"></one-to-one>

When i delete any row from User table the Corresponding Foreign key row in UserInf Table is not deleting, and it report a ERROR
ERROR: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`userinf`, CONSTRAINT `FK2206A016BD228409` FOREIGN KEY (`IID`) REFERENCES `user` (`UID`))
I don't know why, I already add cascade="save-update, delete-orphan" for User. What is the mistake and When a delete a row from User How could I let hibernate delete the row automatic with same ID
Please Help Me.
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