認識できないオプション「クラス、プロパティ」

Question

**Security.yml** Creating Authentication (Log in page) 
     I have attached a error screen shot i am unable to view the page. 

のsecurity.yml（ページにログインします。） 私は私がページを表示することができませんエラーのスクリーンショットを添付しています。 Security.yml認証の作成（ログインページ） エラースクリーンショットを添付しました。ページを表示できません。 Security.yml認証の作成（ログインページ） エラースクリーンショットを添付しました。ページを表示できません。

 [![enter image description here][1]][1] 

     # To get started with security, check out the documentation: 
     # https://symfony.com/doc/current/security.html 
     security: 
      encoders: 
       AppBundle\Entity\User: 
       algorithm: bcrypt 


      # https://symfony.com/doc/current/security.html#b-configuring-how-users-are-loaded 
      providers: 
       db_provider: 
        entity: 
        class: AppBundle:User 
        property: username 


      firewalls: 
       # disables authentication for assets and the profiler, adapt it according to your needs 
       dev: 
        pattern: ^/(_(profiler|wdt)|css|images|js)/ 
        security: false 

       main: 
        anonymous: ~ 
        form_login: 
         login_path: login 
         check_path: login 



    **User.php** This is my entity 

     <?php 

     namespace AppBundle\Entity; 

     use Doctrine\ORM\Mapping as ORM; 
     use Symfony\Component\Security\Core\User\UserInterface; 

     /** 
     * @ORM\Table(name="user") 
     * @ORM\Entity(repositoryClass="AppBundle\Repository\UserRepository") 
     */ 
     class User implements UserInterface, \Serializable 
     { 
      /** 
      * @ORM\Column(type="integer") 
      * @ORM\Id 
      * @ORM\GeneratedValue(strategy="AUTO") 
      */ 
      private $id; 

      /** 
      * @ORM\Column(type="string", length=25, unique=true) 
      */ 
      private $username; 

      /** 
      * @ORM\Column(type="string", length=64) 
      */ 
      private $password; 

      /** 
      * @ORM\Column(type="string", length=60, unique=true) 
      */ 
      private $email; 

      /** 
      * @ORM\Column(name="is_active", type="boolean") 
      */ 
      private $isActive; 

      public function __construct() 
      { 
       $this->isActive = true; 
       // may not be needed, see section on salt below 
       // $this->salt = md5(uniqid('', true)); 
      } 

      public function getUsername() 
      { 
       return $this->username; 
      } 

      public function getSalt() 
      { 
       // you *may* need a real salt depending on your encoder 
       // see section on salt below 
       return null; 
      } 

      public function getPassword() 
      { 
       return $this->password; 
      } 

      public function getRoles() 
      { 
       return array('ROLE_USER'); 
      } 

      public function eraseCredentials() 
      { 
      } 

      /** @see \Serializable::serialize() */ 
      public function serialize() 
      { 
       return serialize(array(
        $this->id, 
        $this->username, 
        $this->password, 
        // see section on salt below 
        // $this->salt, 
       )); 
      } 

      /** @see \Serializable::unserialize() */ 
      public function unserialize($serialized) 
      { 
       list (
        $this->id, 
        $this->username, 
        $this->password, 
        // see section on salt below 
        // $this->salt 
       ) = unserialize($serialized); 
      } 
     } 


     [1]: https://i.stack.imgur.com/U1IJX.jpg 


    **config.yml** 
This is my config.yml here i added driver pdo_sqlite and form_theme: -'bootstrap_3_layout.html.twig' 

    imports: 
     - { resource: parameters.yml } 
     - { resource: security.yml } 
     - { resource: services.yml } 

    # Put parameters here that don't need to change on each machine where the app is deployed 
    # https://symfony.com/doc/current/best_practices/configuration.html#application-related-configuration 
    parameters: 
     locale: en 

    framework: 
     #esi: ~ 
     #translator: { fallbacks: ['%locale%'] } 
     secret: '%secret%' 
     router: 
      resource: '%kernel.project_dir%/app/config/routing.yml' 
      strict_requirements: ~ 
     form: ~ 
     csrf_protection: ~ 
     validation: { enable_annotations: true } 
     #serializer: { enable_annotations: true } 
     templating: 
      engines: ['twig'] 
     default_locale: '%locale%' 
     trusted_hosts: ~ 
     session: 
      # https://symfony.com/doc/current/reference/configuration/framework.html#handler-id 
      handler_id: session.handler.native_file 
      save_path: '%kernel.project_dir%/var/sessions/%kernel.environment%' 
     fragments: ~ 
     http_method_override: true 
     assets: ~ 
     php_errors: 
      log: true 

    # Twig Configuration 
    twig: 
     debug: '%kernel.debug%' 
     strict_variables: '%kernel.debug%' 
     form_theme: 
     - 'bootstrap_3_layout.html.twig' 

    # Doctrine Configuration 
    doctrine: 
     dbal: 
      driver: pdo_sqlite 
      host: '%database_host%' 
      port: '%database_port%' 
      dbname: '%database_name%' 
      user: '%database_user%' 
      password: '%database_password%' 
      charset: UTF8 
      path: '% database_path %' 
      # if using pdo_sqlite as your database driver: 
      # 1. add the path in parameters.yml 
      #  e.g. database_path: '%kernel.project_dir%/var/data/data.sqlite' 
      # 2. Uncomment database_path in parameters.yml.dist 
      # 3. Uncomment next line: 
      #path: '%database_path%' 

     orm: 
      auto_generate_proxy_classes: '%kernel.debug%' 
      naming_strategy: doctrine.orm.naming_strategy.underscore 
      auto_mapping: true 

    # Swiftmailer Configuration 
    swiftmailer: 
     transport: '%mailer_transport%' 
     host: '%mailer_host%' 
     username: '%mailer_user%' 
     password: '%mailer_password%' 
     spool: { type: memory } 


    **parameters.yml** 
This is my parameters.yml file i didn't change anything in this file. 

    # This file is auto-generated during the composer install 
    parameters: 
     database_host: 127.0.0.1 
     database_port: null 
     database_name: symfony 
     database_user: root 
     database_password: null 
     mailer_transport: smtp 
     mailer_host: 127.0.0.1 
     mailer_user: null 
     mailer_password: null 
     secret: ab2af876f87b559feb166e695a29ec552758419a 


    **parameters.yml.dist** 
This is my **parameters.yml.dist** here i uncomment database_path: 
This is my **parameters.yml.dist** here i uncomment database_path: 
This is my **parameters.yml.dist** here i uncomment database_path: 
This is my **parameters.yml.dist** here i uncomment database_path: 


    # This file is a "template" of what your parameters.yml file should look like 
    # Set parameters here that may be different on each deployment target of the app, e.g. development, staging, production. 
    # https://symfony.com/doc/current/best_practices/configuration.html#infrastructure-related-configuration 
    parameters: 
     database_host: 127.0.0.1 
     database_port: ~ 
     database_name: symfony 
     database_user: root 
     database_password: ~ 
     # You should uncomment this if you want to use pdo_sqlite 
     database_path: '%kernel.project_dir%/var/data/data.sqlite' 

     mailer_transport: smtp 
     mailer_host: 127.0.0.1 
     mailer_user: ~ 
     mailer_password: ~ 

     # A secret key that's used to generate certain security-related tokens 
     secret: ThisTokenIsNotSoSecretChangeIt 

Answer 1

設定やインデントが間違っています。

変更

providers: 
    db_provider: 
     entity: 
     class: AppBundle:User 
     property: username 

providers: 
    db_provider: 
     entity: 
      class: AppBundle:User 
      property: username 

参考： http://symfony.com/doc/current/reference/configuration/security.html