使用单表继承时，Doctrine无法生成模式吗? [英] Doctrine can't generate a schema when using single table inheritance?

问题描述

一个有趣的问题.我正在使用Symfony 2构建应用程序，并且试图让Doctrine从我的实体类中自动生成我的架构.我有两个实体类，分别是 Invoice 和 CreditNote . CreditNote 扩展了 Invoice .他们看起来像这样-

Invoice.php-

 命名空间My \ Bundle \ BillingBundle \ Entity;使用Doctrine \ ORM \ Mapping作为ORM；/*** @ORM \实体* @ORM \ Table(name =发票")* @ORM \ InheritanceType("SINGLE_TABLE")* @ORM \ DiscriminatorColumn(name ="discriminator"，type ="string")* @ORM \ DiscriminatorMap({"invoice" ="Invoice"，"credit_note" ="CreditNote"})*/类发票{...} 

和CreditNote.php-

 命名空间My \ Bundle \ BillingBundle \ Entity;使用Doctrine \ ORM \ Mapping作为ORM；/*** @ORM \实体*/CreditNote类扩展发票{...} 

...所有这些似乎都遵循了Doctrine关于单表继承的指导，位于解决方案

它是100％正常工作的代码-我刚刚尝试过

您可能只需要使用以下方法清理缓存:

  php应用程序/控制台缓存:清除&&php应用程序/控制台缓存:clear --env = prod 

但是我使用php app/console doctrine:schema:update(不是doctrine:database:create)

An interesting problem. I'm building an application using Symfony 2 and I'm trying to get Doctrine to auto-generate my schema from my entity classes. I have two entity classes, Invoice and CreditNote. CreditNote extends Invoice. They look like this -

Invoice.php -

namespace My\Bundle\BillingBundle\Entity;

use Doctrine\ORM\Mapping as ORM;

/**
 * @ORM\Entity
 * @ORM\Table(name="invoice")
 * @ORM\InheritanceType("SINGLE_TABLE")
 * @ORM\DiscriminatorColumn(name="discriminator", type="string")
 * @ORM\DiscriminatorMap({"invoice" = "Invoice", "credit_note" = "CreditNote"})
 */
class Invoice
{ ... }

and CreditNote.php -

namespace My\Bundle\BillingBundle\Entity;

use Doctrine\ORM\Mapping as ORM;

/**
 * @ORM\Entity
 */
class CreditNote extends Invoice
{ ... }

...all of which seems to follow Doctrine's guidance on single table inheritance at http://docs.doctrine-project.org/en/2.0.x/reference/inheritance-mapping.html#single-table-inheritance.

But, when I try to run php app/console doctrine:database:create in order to generate my schema I get the error -

PHP Fatal error:  Cannot redeclare class My\Bundle\BillingBundle\Entity\Invoice in <my-app>/src/My/Bundle/BillingBundle/Entity/Invoice.php on line 15

Which suggests that the Invoice class has already been declared (but it honestly hasn't). More interesting is that if I rename the Invoice class to AInvoice (i.e. something that comes before CreditNote in the alphabet, then everything works.

So, it seems like the generator is loading up CreditNote.php, finding a class that extends Invoice and then loading Invoice.php, then finding the Invoice.php file again and trying to parse it a second time. Only that seems the kind of thing that someone would have fixed by now.

Any thoughts? Thanks.

解决方案

it is 100% working code - I tried just

You may need just to clean the cache using:

php app/console cache:clear && php app/console cache:clear --env=prod

but I use php app/console doctrine:schema:update (not doctrine:database:create)

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