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步骤 8: 描述数据结构 配置 Doctrine ORM 理解 Symfony 的环境变量约定 在 .env 文件中修改 DATABASE_URL 的默认值 创建实体类 将多个实体类关联起来 添加更多属性 迁移数据库 更新本地数据库 更新生产服务器 步骤 8: 描述数据结构 我们要依赖 Doctrine 来让 PHP 处理数据库，它...

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