postgresql - 如何为序列名称添加前缀？

Question

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Answer 1

基于此处的答案:How to setup table prefix in symfony2

1. 打开您的包的 Resources/config/services.yml 并添加:

   parameters:
       mybundle.db.sequence_prefix: myprefix_
   

2. 添加新服务:

   services:
       mybundle.sqprefix_subscriber:
           class: MyBundle\Subscriber\SequencePrefixSubscriber
           arguments: [%mybundle.db.sequence_prefix%]
           tags:
               - { name: doctrine.event_subscriber }
   

3. 创建 MyBundle\Subscriber\SequencePrefixSubscriber.php

   <?php
   namespace MyBundle\Subscriber;
   
   use Doctrine\ORM\Event\LoadClassMetadataEventArgs;
   
   class SequencePrefixSubscriber implements \Doctrine\Common\EventSubscriber
   {
       protected $prefix = '';
   
       public function __construct($prefix)
       {
           $this->prefix = (string) $prefix;
       }
   
       public function getSubscribedEvents()
       {
           return array('loadClassMetadata');
       }
   
       public function loadClassMetadata(LoadClassMetadataEventArgs $args)
       {
           $classMetadata = $args->getClassMetadata();
           if ($classMetadata->isInheritanceTypeSingleTable() && !$classMetadata->isRootEntity()) {
               return;
           }
   
   
           if ($classMetadata->isIdGeneratorSequence())
           {
               $newDefinition = $classMetadata->sequenceGeneratorDefinition;
               $newDefinition['sequenceName'] = $this->prefix . $newDefinition['sequenceName'];
   
               $classMetadata->setSequenceGeneratorDefinition($newDefinition);
               $em = $args->getEntityManager();
               if (isset($classMetadata->idGenerator)) {
                   $sequenceGenerator = new \Doctrine\ORM\Id\SequenceGenerator(
                       $em->getConfiguration()->getQuoteStrategy()->getSequenceName(
                           $newDefinition,
                           $classMetadata,
                           $em->getConnection()->getDatabasePlatform()),
                       $newDefinition['allocationSize']
                   );
                   $classMetadata->setIdGenerator($sequenceGenerator);
               }
           }
       }
   }
   

引用:http://www.doctrine-project.org/api/orm/2.0/class-Doctrine.ORM.Mapping.ClassMetadataInfo.html

文档为 sequenceGeneratorDefinition 属性说明了 READ-ONLY 所以我认为使用 setter 比手动更改值更干净(但是没有 getter 所以我们只需使用公共(public)属性值)。