使用Symfony2配置类,如何定义子节点没有键的数组节点？

Question

使用配置类,如何在没有数字键的情况下定义数组节点？数组的子代不代表进一步的配置选项.相反,它们将是一个无法有选择地覆盖的列表,仅作为一个整体.

到目前为止,我有:

public function getConfigTreeBuilder()
{
    $treeBuilder = new TreeBuilder;
    $root = $treeBuilder->root('acme_base');

    $root
        ->children()
            ->arrayNode('entities')

                // Unfortunately, this doesn't work
                ->defaultValue(array(
                    'Acme\BaseBundle\Entity\DefaultEntity1',
                    'Acme\BaseBundle\Entity\DefaultEntity2',
                ))

            ->end()
        ->end();

    return $treeBuilder;
}

在app/config.yml,我希望能够像这样覆盖它:

acme_base:
  entities:
    - 'Acme\BaseBundle\Entity\AnotherEntity1'
    - 'Acme\BaseBundle\Entity\AnotherEntity2'
    - 'Acme\BaseBundle\Entity\AnotherEntity3'
    - 'Acme\BaseBundle\Entity\AnotherEntity4'

Answer 1

我想你需要

$root
    ->children()
        ->arrayNode('entities')
        ->addDefaultsIfNotSet()
        ->prototype('scalar')->end()
        ->defaultValue(array(
            'Acme\BaseBundle\Entity\DefaultEntity1',
            'Acme\BaseBundle\Entity\DefaultEntity2',
        ))
    ->end()