如何使用Doctrine 2中的「類表繼承」與XML映射

Question

我想使用XML映射（Symfony 2 PR 7）的Doctrine 2的「類表繼承特性」。在XML超CatalogProduct的

XML定義：XML超CatalogBook的

<?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定義，應該擴展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應用程序/控制檯學說：生成：實體「CatalogBu​​ndle」

正常工作（實體generatetd），但CatalogBook原來是一個「簡單」類，不擴展CatalogProduct。

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

導致異常：

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

我猜，我缺少的東西XML，它告訴CatalogBook實體延伸CatalogProduct。但是我沒有在Doctrine 2文檔或谷歌上找到任何幫助。

Answer 1

生成實體不會爲您生成繼承層次，因爲從語義上講這是不可能的。你必須在調用原則之後自己做：generate：entities。