Liquibase: Как установить ограничение внешнего ключа (ов) в теге столбца?

Ответ 1

Используйте тег <constraints> в теге столбца.

Пример:

<changeSet id="SAMPLE_1" author="alice">
    <createTable tableName="employee">
        <column name="id" type="int" autoIncrement="true">
            <constraints primaryKey="true"/>
        </column>
        <column name="first_name" type="varchar(255)"/>
        <column name="last_name" type="varchar(255)">
            <constraints nullable="false"/>
        </column>
    </createTable>
</changeSet>

<changeSet id="create address table" author="bob">
    <createTable tableName="address">
        <column name="id" type="int" autoIncrement="true">
            <constraints primaryKey="true"/>
        </column>
        <column name="line1" type="varchar(255)">
            <constraints nullable="false"/>
        </column>
        <column name="line2" type="varchar(255)"/>
        <column name="city" type="varchar(100)">
            <constraints nullable="false"/>
        </column>
        <column name="employee_id" type="int">
            <constraints nullable="false" foreignKeyName="fk_address_employee" references="employee(id)"/>
        </column>
    </createTable>
</changeSet>

Ответ 2

Возможно, вы можете добавить внешний ключ, как показано ниже:

<changeSet id="1" author="ozhanli">
    <!--
    Owner Entity.
    -->
    <createTable tableName="owner">
        <column name="id" type="bigint" autoIncrement="true">
            <constraints primaryKey="true" nullable="false"/>
        </column>
        <column name="name" type="varchar(255)">
            <constraints nullable="true" />
        </column>
    </createTable>

    <!--
    Car Entity.
    -->
    <createTable tableName="car">
        <column name="id" type="bigint" autoIncrement="true">
            <constraints primaryKey="true" nullable="false"/>
        </column>
        <column name="brand" type="varchar(255)">
            <constraints nullable="true" />
        </column>
        <column name="owner_id" type="bigint">
            <constraints nullable="true" />
        </column>
    </createTable>

    <!--
    Constraints fo Car entity
    -->
    <addForeignKeyConstraint baseColumnNames="owner_id"
                             baseTableName="car"
                             constraintName="fk_car_owner_id"
                             referencedColumnNames="id"
                             referencedTableName="owner"/>
</changeSet>