Empty Dashboard Symfony3 sonata adminBundle - symfony

Question

Faced the problem of setting up the admin panel. I do everything according to the documentation, there are no errors, Dashboard opens and everything is empty. The project is simple as a door - the simplest blog. Nothing shows up - neither the names of categories nor posts. The whole brain broke itself.
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: en
framework:
#esi: ~
translator: { fallbacks: [en] }
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%'
# 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 }
#Cache
doctrine_cache:
providers:
my_markdown_cache:
type: file_system
file_system:
directory: /tmp/doctrine_cache
sonata_admin:
title: My Blog Admin
sonata_block:
default_contexts: [cms]
blocks:
sonata.admin.block.admin_list:
contexts: [admin]
services.yml
parameters:
#parameter_name: value
services:
# default configuration for services in *this* file
_defaults:
# automatically injects dependencies in your services
autowire: true
# automatically registers your services as commands, event subscribers, etc.
autoconfigure: true
# this means you cannot fetch services directly from the container via $container->get()
# if you need to do this, you can override this setting on individual services
public: false
# makes classes in src/AppBundle available to be used as services
# this creates a service per class whose id is the fully-qualified class name
AppBundle\:
resource: '../../src/AppBundle/*'
# you can exclude directories or files
# but if a service is unused, it's removed anyway
exclude: '../../src/AppBundle/{Entity,Repository,Tests}'
# controllers are imported separately to make sure they're public
# and have a tag that allows actions to type-hint services
AppBundle\Controller\:
resource: '../../src/AppBundle/Controller'
public: true
tags: ['controller.service_arguments']
# add more services, or override services that need manual wiring
# AppBundle\Service\ExampleService:
# arguments:
# $someArgument: 'some_value'
services:
app.admin.category:
class: AppBundle\Admin\CategoryAdmin
arguments: [~, AppBundle\Entity\Category, ~]
tags:
- { name: sonata.admin, manager_type: orm, label: Category }
public: true
app.admin.articles:
class: AppBundle\Admin\ArticlesAdmin
arguments: [~, AppBundle\Entity\Articles, ~]
tags:
- { name: sonata.admin, manager_type: orm, label: Blog post }
public: true
CategoryAdmin class
namespace AppBundle\Admin;
use Sonata\AdminBundle\Admin\AbstractAdmin;
use Sonata\AdminBundle\Datagrid\ListMapper;
use Sonata\AdminBundle\Datagrid\DatagridMapper;
use Sonata\AdminBundle\Form\FormMapper;
use Sonata\AdminBundle\Show\ShowMapper;
class CategoryAdmin extends AbstractAdmin
{
protected function configureFormFields(FormMapper $formMapper)
{
$formMapper->add('name', 'text', array('label' => 'Название'));
}
protected function configureDatagridFilters(DatagridMapper $datagridMapper)
{
$datagridMapper->add('name');
}
protected function configureListFields(ListMapper $listMapper)
{
$listMapper->addIdentifier('name');
}
protected function configureShowFields(ShowMapper $showMapper)
{
$showMapper
->add('name');
}
}
Category Entity Class
namespace AppBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
use Doctrine\Common\Collections\ArrayCollection;
/**
* Category
*
* #ORM\Table(name="category")
* #ORM\Entity(repositoryClass="AppBundle\Repository\CategoryRepository")
*/
class Category
{
/**
* #ORM\OneToMany(targetEntity="Articles", mappedBy="category")
*/
private $blogPosts;
public function __construct()
{
$this->blogPosts = new ArrayCollection();
}
public function getBlogPosts()
{
return $this->blogPosts;
}
/**
* #var int
*
* #ORM\Column(name="id", type="integer")
* #ORM\Id
* #ORM\GeneratedValue(strategy="AUTO")
*/
private $id;
/**
* #var string
*
* #ORM\Column(name="name", type="string", length=255)
*/
private $name;
/**
* Get id
*
* #return int
*/
public function getId()
{
return $this->id;
}
/**
* Set name
*
* #param string $name
*
* #return Category
*/
public function setName($name)
{
$this->name = $name;
return $this;
}
/**
* Get name
*
* #return string
*/
public function getName()
{
return $this->name;
}

Answer 1

The problem is solved. The solution was not in the documentation for the bundle but in the documentation of the symphony