Expected to find class in file - sonata-admin

Question

I'm following the doc about the installation of Sonata Admin Bundle. I'm havong a problem during the step 'Creating an Admin'.
I'm Having the following error :
Expected to find class "AppBundle\Admin\CategoryAdmin" in file
"[...]/src/AppBundle/Admin/CategoryAdmin.php"
while importing services from resource "../../src/AppBundle/*", but it
was not found! Check the namespace prefix used with the resource in
[...]/app/config/services.yml
(which is being imported from
"[...]/app/config/config.yml").
I've created my "Category Admin class"
<?php
// src/Admin/CategoryAdmin.php
namespace App\Admin;
use Sonata\AdminBundle\Admin\AbstractAdmin;
use Sonata\AdminBundle\Datagrid\ListMapper;
use Sonata\AdminBundle\Datagrid\DatagridMapper;
use Sonata\AdminBundle\Form\FormMapper;
use Symfony\Component\Form\Extension\Core\Type\TextType;
class CategoryAdmin extends AbstractAdmin
{
protected function configureFormFields(FormMapper $formMapper)
{
$formMapper->add('name', TextType::class);
}
protected function configureDatagridFilters(DatagridMapper $datagridMapper)
{
$datagridMapper->add('name');
}
protected function configureListFields(ListMapper $listMapper)
{
$listMapper->addIdentifier('name');
}
}
and set them into the config.yml
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: fr
framework:
#esi: ~
translator: { fallbacks: ['%locale%'] }
secret: '%secret%'
templating:
engines: ['twig']
router:
resource: '%kernel.project_dir%/app/config/routing.yml'
strict_requirements: ~
form: ~
csrf_protection: ~
validation: { enable_annotations: true }
#serializer: { enable_annotations: true }
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
services:
# ...
admin.category:
class: App\Admin\CategoryAdmin
arguments: [~, App\Entity\Category, ~]
tags:
- { name: sonata.admin, manager_type: orm, label: Category }
public: true
# Twig Configuration
twig:
debug: '%kernel.debug%'
strict_variables: '%kernel.debug%'
# Doctrine Configuration
doctrine:
dbal:
driver: pdo_mysql
host: '%database_host%'
port: '%database_port%'
dbname: '%database_name%'
user: '%database_user%'
password: '%database_password%'
charset: UTF8
# 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 }
fos_user:
db_driver: orm # other valid values are 'mongodb' and 'couchdb'
firewall_name: main
user_class: AppBundle\Entity\User
from_email:
address: "%mailer_user%"
sender_name: "%mailer_user%"
# config/packages/sonata_admin.yaml
sonata_block:
blocks:
# enable the SonataAdminBundle block
sonata.admin.block.admin_list:
contexts: [admin]
THe route is working so I will not post it.
My project is built like you see under the screenshot :
Symfony Structure
So Is there a problem with how I've built my project or I'm doing something on the config files ?
I've tried to copy/paste files names in case the problem is from a file name but It change anything. Any idea ?

Answer 1

Your namespace is incorrect as it seems from error and first look.
Check following code.
<?php
namespace AppBundle\Admin; # CHANGE THIS LINE TO FOLLOWING!
use Sonata\AdminBundle\Admin\AbstractAdmin;
use Sonata\AdminBundle\Datagrid\ListMapper;
use Sonata\AdminBundle\Datagrid\DatagridMapper;
use Sonata\AdminBundle\Form\FormMapper;
use Symfony\Component\Form\Extension\Core\Type\TextType;
class CategoryAdmin extends AbstractAdmin
{
protected function configureFormFields(FormMapper $formMapper)
{
$formMapper->add('name', TextType::class);
}
protected function configureDatagridFilters(DatagridMapper $datagridMapper)
{
$datagridMapper->add('name');
}
protected function configureListFields(ListMapper $listMapper)
{
$listMapper->addIdentifier('name');
}
}
And services
services:
# ...
admin.category:
class: AppBundle\Admin\CategoryAdmin # fix here
arguments: [~, AppBundle\Entity\Category, ~] # and here
tags:
- { name: sonata.admin, manager_type: orm, label: Category }
public: true