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3. Create child admins


This article assumes you are using Symfony 4. Using Symfony 2.8 or 3 will require to slightly modify some namespaces and paths when creating entities and admins.

Let us say you have a PlaylistAdmin and a VideoAdmin. You can optionally declare the VideoAdmin to be a child of the PlaylistAdmin. This will create new routes like, for example, /playlist/{id}/video/list, where the videos will automatically be filtered by post.

To do this, you first need to call the addChild method in your PlaylistAdmin service configuration with two arguments, the child admin name (in this case VideoAdmin service) and the Entity field that relates our child Entity with its parent:

  • YAML
    # app/config/services.yml
            - [ addChild, ['@App\Admin\VideoAdmin', 'playlist']]
  • XML
    <!-- app/config/services.xml -->
    <service id="App\Admin\PlaylistAdmin">
        <!-- ... -->
        <call method="addChild">
            <argument type="service" id="App\Admin\PlaylistAdmin" />

To display the VideoAdmin extend the menu in your PlaylistAdmin class:


namespace App\Admin;

use Knp\Menu\ItemInterface as MenuItemInterface;
use Sonata\AdminBundle\Admin\AbstractAdmin;
use Sonata\AdminBundle\Admin\AdminInterface;

class PlaylistAdmin extends AbstractAdmin
    // ...

    protected function configureSideMenu(MenuItemInterface $menu, $action, AdminInterface $childAdmin = null)
        if (!$childAdmin && !in_array($action, ['edit', 'show'])) {

        $admin = $this->isChild() ? $this->getParent() : $this;
        $id = $admin->getRequest()->get('id');

        $menu->addChild('View Playlist', [
            'uri' => $admin->generateUrl('show', ['id' => $id])

        if ($this->isGranted('EDIT')) {
            $menu->addChild('Edit Playlist', [
                'uri' => $admin->generateUrl('edit', ['id' => $id])

        if ($this->isGranted('LIST')) {
            $menu->addChild('Manage Videos', [
                'uri' => $admin->generateUrl('', ['id' => $id])

It also possible to set a dot-separated value, like, if your parent and child admins are not directly related.

Be wary that being a child admin is optional, which means that regular routes will be created regardless of whether you actually need them or not. To get rid of them, you may override the configureRoutes method:


namespace App\Admin;

use Sonata\AdminBundle\Admin\AbstractAdmin;
use Sonata\AdminBundle\Route\RouteCollection;

class VideoAdmin extends AbstractAdmin
    protected $parentAssociationMapping = 'playlist';

    protected function configureRoutes(RouteCollection $collection)
        if ($this->isChild()) {

        // This is the route configuration as a parent


You can nest admins as deep as you wish.

Let’s say you want to add comments to videos.

You can then add your CommentAdmin admin service as a child of the VideoAdmin admin service.

Finally, the admin interface will look like this:

Child admin interface

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