Question

我有以下两张表：

Jobs
--------
JobNo
DivisionID

NCRs
--------
ID
JobNo
SpoilageJobNo
DivisionID

JobNo和DivisionID在Jobs表中组成一个复合键（我知道，但不幸的是它必须是一个复合键，因为它实际上是一个从4个不同数据库中提取数据的视图），我需要将此密钥加入JobNo和SpoilageJobNo上的NCR表。

我尝试过以下映射：

<class name="Job" table="v_Jobs">
    <composite-id name="Key">
        <key-property name="JobNo"></key-property>
        <key-many-to-one name="Division" class="Division" column="DivisionID"/>
    </composite-id>

    <bag name="NCRs">
        <key>
            <column name="JobNo"></column>
            <column name="DivisionID"></column>
        </key>
        <one-to-many class="NCR"/>
    </bag>

    <bag name="SpoilageNCRs">
        <key>
            <column name="SpoilageJobNo"></column>
            <column name="DivisionID"></column>
        </key>
        <one-to-many class="NCR"/>
    </bag>
</class>

<class name="NCR" table="NCRs">
    <id name="ID">
        <generator class="identity"></generator>
    </id>

    <many-to-one name="Division"
                 class="Division"
                 column="DivisionID">
    </many-to-one>

    <many-to-one name="Job"
                 class="Job"
                 column="JobNo">
    </many-to-one>

    <many-to-one name="SpoilageJob"
                 class="Job"
                 column="SpoilageJobNo">
    </many-to-one>
</class>

但我收到错误Foreign key (FK480F1031931B2CA4:NCRs [JobNo])) must have same number of columns as the referenced primary key (v_Jobs [JobNo, DivisionID])

Answer 1

_{这是汤姆在他的问题上发表的答案：}

啊哈，我觉得我已经知道了。我用这个更新了NCR的映射：

<many-to-one name="Job" class="Job">
    <column name="JobNo"></column>
    <column name="DivisionID"></column>
</many-to-one>

<many-to-one name="SpoilageJob" class="Job">
    <column name="SpoilageJobNo"></column>
    <column name="DivisionID"></column>
</many-to-one>

将复合键映射到两个外键

1 个答案: