Php Symfony gedmo可翻译文件不工作

这是我的config.yml：

orm:
    auto_generate_proxy_classes: "%kernel.debug%"
    auto_mapping: true
    naming_strategy: doctrine.orm.naming_strategy.underscore
    mappings:
        gedmo_translatable:
            type: annotation
            prefix: Gedmo\Translatable\Entity
            dir: "%kernel.root_dir%/../vendor/gedmo/doctrine-extensions/lib/Gedmo/Translatable/Entity/MappedSuperclass"
            alias: GedmoTranslatable
            is_bundle: false
    filters:
        softdeleteable:
            class: Gedmo\SoftDeleteable\Filter\SoftDeleteableFilter
            enabled: true
        product_category_filter:
            class: AppBundle\Bundle\CoreBundle\Doctrine\Filter\CategoryFilter
            enabled: false

stof_doctrine_extensions:
  default_locale: "%locale%"
  translation_fallback: false
  orm:
    default:
        translatable: true

这是需要转换的实体的注释部分：

/**
 * @Gedmo\TranslationEntity(class="AppBundle\Bundle\CoreBundle\Entity\Translation\ProductCategory")
 * @ORM\Entity(repositoryClass="AppBundle\Bundle\CoreBundle\Entity\Repository\ProductCategoryRepository")
 * @ORM\Table(name="product_categories")
 * @Serializer\ExclusionPolicy("none")
 * @Gedmo\SoftDeleteable(fieldName="deletedAt", timeAware=false)
 */

这是转换实体的注释部分

/**
 * @ORM\Table(name="product_category_translations", indexes={
 *      @ORM\Index(name="product_category_translation_idx", columns={"locale", "object_class", "field", "foreign_key"})
 * })
 * @ORM\Entity(repositoryClass="Gedmo\Translatable\Entity\Repository\TranslationRepository")
 */

但当我这样做的时候：

$category->getTitle()

我总是使用英语（非翻译）值，即使我的语言环境不同

有人知道我做错了什么

还是我的问题中遗漏了信息/代码的关键部分

---

注：我正在使用symfony 2.8，您需要在config.yml中激活它：

orm:
    auto_generate_proxy_classes: "%kernel.debug%"
    auto_mapping: true
    naming_strategy: doctrine.orm.naming_strategy.underscore
    mappings:
        gedmo_translatable:
            type: annotation
            prefix: Gedmo\Translatable\Entity
            dir: "%kernel.root_dir%/../vendor/gedmo/doctrine-extensions/lib/Gedmo/Translatable/Entity/MappedSuperclass"
            alias: GedmoTranslatable
            is_bundle: false
    filters:
        softdeleteable:
            class: Gedmo\SoftDeleteable\Filter\SoftDeleteableFilter
            enabled: true
        product_category_filter:
            class: AppBundle\Bundle\CoreBundle\Doctrine\Filter\CategoryFilter
            enabled: false

stof_doctrine_extensions:
  default_locale: "%locale%"
  translation_fallback: false
  orm:
    default:
        translatable: true