Symfony6+PHP8集成kreait/firebase-bundle时凭证文件不存在错误求助

使用Symfony 6 + PHP 8环境，通过kreait/firebase-bundle实现从Firebase获取用户列表并集成到API Platform中。调用API路径时触发错误：

Invalid service account: The file at 'firebase_credentials.json' does not exist

已通过firebase.yaml和.env.local配置路径，但问题仍未解决，相关配置及代码如下：

composer.json 依赖配置 #

// composer.json
{
    "require": {
        "php": ">=8.1",
        "ext-ctype": "*",
        "ext-iconv": "*",
        "api-platform/core": "^2.6",
        "doctrine/annotations": "^1.0",
        "doctrine/doctrine-bundle": "^2.7",
        "doctrine/doctrine-migrations-bundle": "^3.2",
        "doctrine/orm": "^2.12",
        "kreait/firebase-bundle": "^4.1",
        "lexik/jwt-authentication-bundle": "^2.16",
        "nelmio/cors-bundle": "^2.2",
        "phpdocumentor/reflection-docblock": "^5.3",
        "phpstan/phpdoc-parser": "^1.6",
        "sensio/framework-extra-bundle": "^6.1",
        "symfony/asset": "6.1.*",
        "symfony/console": "6.1.*",
        "symfony/doctrine-messenger": "6.1.*",
        "symfony/dotenv": "6.1.*",
        "symfony/expression-language": "6.1.*",
        "symfony/flex": "^2",
        "symfony/form": "6.1.*",
        "symfony/framework-bundle": "6.1.*",
        "symfony/http-client": "6.1.*",
        "symfony/intl": "6.1.*",
        "symfony/mailer": "6.1.*",
        "symfony/mime": "6.1.*",
        "symfony/monolog-bundle": "^3.0",
        "symfony/notifier": "6.1.*",
        "symfony/process": "6.1.*",
        "symfony/property-access": "6.1.*",
        "symfony/property-info": "6.1.*",
        "symfony/proxy-manager-bridge": "6.1.*",
        "symfony/runtime": "6.1.*",
        "symfony/security-bundle": "6.1.*",
        "symfony/serializer": "6.1.*",
        "symfony/string": "6.1.*",
        "symfony/translation": "6.1.*",
        "symfony/twig-bundle": "6.1.*",
        "symfony/validator": "6.1.*",
        "symfony/web-link": "6.1.*",
        "symfony/yaml": "6.1.*",
        "twig/extra-bundle": "^2.12|^3.0",
        "twig/twig": "^2.12|^3.0"
    }
}

Firebase 配置文件（firebase.yaml） #

// my_project/config/packages/firebase.yaml
kreait_firebase:
  projects:
    my_project:
      public: true
      default: true
      credentials: '%env(FIREBASE_CREDENTIALS)%'
      verifier_cache: cache.app
      auth_token_cache: cache.app

环境变量配置（.env.local） #

// .env.local, json file is at root of project
###> kreait/firebase-bundle ###
FIREBASE_CREDENTIALS="firebase_credentials.json"
###< kreait/firebase-bundle ###

API Platform 数据提供者代码 #

// FirebaseDataProvider for FirebaseUser entity endpoint
use Kreait\Firebase\Contract\Auth;

class FirebaseDataProvider implements ContextAwareCollectionDataProviderInterface, RestrictedDataProviderInterface
{
    private Auth $auth;

    public function __construct(Auth $firebase)
    {
        $this->auth = $firebase;
    }

    public function getCollection(string $resourceClass, string $operationName = null, array $context = [])
    {
        dd($this->auth->listUsers());
    }

    public function supports(string $resourceClass, string $operationName = null, array $context = []): bool
    {
        return $resourceClass === FirebaseUser::class;
    }
}

1. 修正路径引用方式 #

Symfony环境变量中的相对路径默认指向项目public目录，而非根目录。如果凭证文件放在项目根目录，修改.env.local用绝对路径参数：

FIREBASE_CREDENTIALS="%kernel.project_dir%/firebase_credentials.json"

2. 检查文件权限 #

确保PHP进程能读取凭证文件：

chmod 644 firebase_credentials.json

3. 清除缓存并重启服务 #

Symfony会缓存环境变量，修改配置后执行缓存清理：

# 开发环境
php bin/console cache:clear

# 生产环境
php bin/console cache:clear --env=prod

如果用内置服务器，重启服务确保新配置生效。

4. 验证文件实际路径 #

临时在FirebaseDataProvider中添加路径打印，确认文件位置：

public function __construct(Auth $firebase, string $projectDir)
{
    $this->auth = $firebase;
    var_dump($projectDir . '/firebase_credentials.json');
    exit;
}

调用API查看输出路径，确认文件是否真实存在。

5. 检查Bundle配置加载情况 #

执行命令查看FireBundle的实际配置，确认凭证路径是否正确：

php bin/console config:dump kreait_firebase

内容的提问来源于stack exchange，提问作者Sheitak