Question

I have a user table and a user_detail table with one to one mapping user_detail table have a field user_id to be used for this relation which stores id field value of corresponding user.

How to write the hibernate hbm file for this relation?

UPDATE

what my problem is that user’s primary key is id , user_detail’s foreign key is user_id

all the examples i got in internet users user_id as users primary key and the same as foreign key in other table

Answer 1

For User mapping….

<?xml version="1.0"?>
        <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
        "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
        <!-- Generated 25 April 2011 7:52:33 PM by Hibernate Tools 3.4.0.CR1 -->
        <hibernate-mapping>
            <class name="com.rais.User" table="USER" catalog="mydb">
                <id name="userId" type="java.lang.Integer">
                    <column name="USER_ID" />
                    <generator class="identity" />
                </id>
                <property name="userName" type="string">
                    <column name="USER_NAME" length="10" not-null="true" unique="true" />
                </property>
                <property name="userCode" type="string">
                    <column name="USER_CODE" length="20" not-null="true" unique="true" />
                </property>
                <one-to-one name="userDetail" class="com.rais.UserDetail"
                    cascade="save-update"></one-to-one>
            </class>
        </hibernate-mapping>

For UserDetail mapping.

    <?xml version="1.0"?>
    <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
    "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
    <!-- Generated 25 April 2011 7:52:33 PM by Hibernate Tools 3.4.0.CR1 -->
    <hibernate-mapping>
        <class name="com.rais.UserDetail" table="USER_DETAIL"
            catalog="mydb">
            <id name="userId" type="java.lang.Integer">
                <column name="USER_ID" />
                <generator class="foreign">
                    <param name="property">user</param>
                </generator>
            </id>
            <one-to-one name="user" class="com.rais.User"
                constrained="true"></one-to-one>
            <property name="compName" type="string">
                <column name="COMP_NAME" length="100" not-null="true" />
            </property>
            <property name="compDesc" type="string">
                <column name="COMP_DESC" not-null="true" />
            </property>
            <property name="remark" type="string">
                <column name="REMARK" not-null="true" />
            </property>
        </class>
    </hibernate-mapping>