如何使用“类表继承”在带有 XML 映射的原则 2 中

Question

我正在尝试将 Doctrine 2 的“类表继承功能”与 XML 映射 (Symfony 2 PR 7) 结合使用。

XML 超类 CatalogProduct 的 XML 定义：

<?xml version="1.0" encoding="UTF-8"?>
<doctrine-mapping xmlns="http://doctrine-project.org/schemas/orm/doctrine-mapping"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xsi:schemaLocation="http://doctrine-project.org/schemas/orm/doctrine-mapping
                          http://www.doctrine-project.org/schemas/orm/doctrine-mapping.xsd">
    <entity name="MyApp\CatalogBundle\Entity\CatalogProduct" table="catalog_product" inheritance-type="JOINED">
        <discriminator-column name="discr" type="string" />
        <discriminator-map>
            <discriminator-mapping value="book" class="MyApp\CatalogBundle\Entity\CatalogBook" />
        </discriminator-map>
        <id name="id" type="integer" column="id">
            <generator strategy="AUTO"/>
            <sequence-generator sequence-name="tablename_seq" allocation-size="100" initial-value="1" />
        </id>
        <field name="name" column="name" type="string" length="50" nullable="true" unique="false" />
        <field name="isPublic" column="is_public" type="boolean" />        
    </entity>    
</doctrine-mapping>

XML 超类 CatalogBook 的 XML 定义，应该扩展 CatalogProduct：

<?xml version="1.0" encoding="UTF-8"?>
<doctrine-mapping xmlns="http://doctrine-project.org/schemas/orm/doctrine-mapping"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xsi:schemaLocation="http://doctrine-project.org/schemas/orm/doctrine-mapping
                          http://www.doctrine-project.org/schemas/orm/doctrine-mapping.xsd">
    <entity name="MyApp\CatalogBundle\Entity\CatalogBook" table="catalog_book">
        <id name="id" type="integer" column="id">
            <generator strategy="AUTO"/>
            <sequence-generator sequence-name="tablename_seq" allocation-size="100" initial-value="1" />
        </id>
        <field name="author_name" column="author_name" type="string" length="50" nullable="true" unique="false" />
    </entity>    
</doctrine-mapping>

./php app/console 学说：生成：实体“CatalogBu​​ndle”

工作正常（实体生成），但 CatalogBook 结果是一个“ simple”类，不扩展 CatalogProduct。

$book = new CatalogBook();
$book->setAuthorName('some author');
$book->setName('some book name');

导致异常：

Fatal error: Call to undefined method MyApp\CatalogBundle\Entity\CatalogBook::setName()

我想，我在 XML 中遗漏了一些东西，它告诉 CatalogBook 实体扩展 CatalogProduct。但我在 Doctrine 2 文档或 Google 上找不到任何有帮助的内容。

Answer 1

生成实体不会为您生成继承层次结构，因为这在语义上是不可能的。在调用doctrine:generate:entities后你必须自己做。