Question

我有两个父表和一个子表，下面提到了复合键：

Employee: 
        employeeId1 (PK)
        employeeId2 (PK)
        employeeName
        ---some other columns go here----


Student:
       studentId1 (PK)
       studentId2 (PK)
       studentName
       ---some other columns go here----

Address:
      addressId (PK)
      addressPersonId1 (PK & FK)
      addressPersonId2 (PK & FK)
      ---some other columns go here----

员工和学生可以拥有相同的地址，因此员工和学生可以在地址中引用相同的记录。

这些不是我在我的应用程序中的实际表格，但结构保持不变， 我无法不惜一切代价更改表格结构 。

我想在（员工，地址）和（学生，地址）之间建立一对一的关系。由于PK列的数量和PK列的名称不相同，我无法创建关系。

将Address（addressPersonId1，addressPersonId2）中的列指定为Primary和Forign键的方法是什么。如何从Parent hbm文件中引用这些forign键。

**I have to establish mapping using HBM files but not hibernate or JPA annotations.**


**Is there any way to specify forign key column names in One to One tag in hbm file.**

提前感谢任何建议和解决方案。

Employee.hbm.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
    <class name="com.model.Employee" table="EMPLOYEE">
        <composite-id name="employeePK" class="com.model.EmployeePK">
            <key-property name="employeeId" column="EMPLOYEE_ID" />
            <key-property name="employeeName" column="EMPLOYEE_NAME" />
        </composite-id>

        <property name="employeeStatus" type="string">
            <column name="EMPLOYEE_STATUS" />
        </property>

        <one-to-one name="address" class="com.model.Address"
            cascade="all">
        </one-to-one>

    </class>
</hibernate-mapping>


Student.hbm.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
    <class name="com.model.Student" table="STUDENT">
        <composite-id name="studentPK" class="com.model.StudentPK">
            <key-property name="studentId" column="STUDENT_ID" />
            <key-property name="studentName" column="STUDENT_NAME" />
        </composite-id>

        <property name="studentStatus" type="string">
            <column name="STUDENT_STATUS" />
        </property>
    </class>
</hibernate-mapping>



Address.hbm.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
    <class name="com.model.Address" table="ADDRESS">
        <composite-id name="addressPK" class="com.model.AddressPK">
            <key-property name="addressId" column="ADDRESS_ID" />
            <key-property name="addressPersonId" column="ADDRESS_PERSON_ID" />
            <key-property name="addressPersonName" column="ADDRESS_PERSON_NAME" />
        </composite-id>

        <property name="addressStatus" type="string">
            <column name="ADDRESS_STATUS" />
        </property>
    </class>
</hibernate-mapping>

Answer 1

尝试在一对一之前添加密钥

<one-to-one name="address" class="com.model.Address" cascade="all"></one-to-one>

成了：

<key>
    <column name="addressPK.studentCompositeId<!--<<im not sure about this, maybe you can try studentCompositeId-->" not-null="true" />
</key>
<one-to-one name="address" class="com.model.Address" cascade="all"/>

并将地址的2个复合键更改为1个复合（您还需要编辑该类），以便com.model.AddressPK中包含键addressId和com.model.StudentPK这样的内容可能：

<composite-id name="addressPK" class="com.model.AddressPK">
    <key-property name="addressId" column="ADDRESS_ID" />
    <composite-id name="studentCompositeId" class="com.model.StudentPK">
        <key-property name="studentId" type="string">
            <column name="ADDRESS_PERSON_ID"/>
        </key-property>
        <key-property name="studentName" type="string">
            <column name="ADDRESS_PERSON_NAME"/>
        </key-property>
    </composite-id> 
</composite-id>

Hibernate One To One映射，包含一个子表和两个父表

1 个答案: