Symfony4中app/config/config.yml缺失？使用FOSUserBundle配置受阻

Hey there! I totally get the confusion here—Symfony 4 overhauled its configuration structure compared to older versions (2/3), so that tutorial you’re following is likely written for the older directory setup. Let me walk you through how to adjust this for Symfony 4:

Key Change: Configuration File Location #

In Symfony 4+, all bundle-specific configuration lives in the config/packages/ directory, not the old app/config/ folder. For FOSUserBundle, you’ll need to create (or edit) a file named fos_user.yaml (.yml works too) in that directory.

Step-by-Step Setup #

1. Create the FOSUserBundle config file
   Navigate to config/packages/ and create fos_user.yaml if it doesn’t already exist (some FOSUserBundle versions generate this automatically during installation, but if not, make it manually).

2. Add the updated configuration
   Paste this into the file, adjusting values to match your setup:

   fos_user:
       db_driver: orm # Other valid options: 'mongodb' or 'couchdb'
       firewall_name: main
       user_class: App\Entity\User # Symfony 4 uses App\Entity instead of AppBundle\Entity
       from_email:
           address: '%mailer_user%'
           sender_name: '%mailer_user%'
   

   Note: The user_class line is critical—Symfony 4 dropped the default AppBundle structure, so your User entity should live in src/Entity/User.php with the namespace App\Entity\User.

3. Verify your security firewall
   Make sure your config/packages/security.yaml has the main firewall configured to use FOSUserBundle. Here’s a basic working example:

   security:
       providers:
           fos_userbundle:
               id: fos_user.user_provider.username
   
       firewalls:
           main:
               pattern: ^/
               form_login:
                   provider: fos_userbundle
                   login_path: fos_user_security_login
                   check_path: fos_user_security_check
               logout:
                   path: fos_user_security_logout
               anonymous: true
   

4. Set your mailer environment variable
   The %mailer_user% placeholder pulls from your root .env file. Open .env and add/update this line:

   MAILER_USER=your-email@example.com
   

Once you’ve completed these steps, clear your Symfony cache by running php bin/console cache:clear in your terminal, and you should be ready to proceed!

内容的提问来源于stack exchange，提问作者M_Idrees