The custom entity in easy admin

For update

    public function updateEntity($entity)
    {
    	$user = $this->getUser();
        if (method_exists($entity, 'setUserId')) {
            $entity->setUserId($user);
        }
        parent::updateEntity($entity);
    }

For parsing data

    public function persistEntity($entity)
    {
    	
    	$user = $this->getUser();
    	$userRoles = $user->getRoles();
    	

        if (method_exists($entity, 'setUserId') && $userRoles[0] != 'ROLE_ADMIN') {
            $entity->setUserId($user);
        }

        $userId = $entity->getUserId()->getId();
        $this->isExists($userId);
        parent::updateEntity($entity);
    }

Configure the custom class packages/easy_admin.yaml

easy_admin:
  site_name: "Dashboard"
  entities:
      School:
        controller: App\Controller\SchoolController 
        class: App\Entity\School 

For removing data

	protected function removeEntity($entity){
		$userRoles = $this->getUser()->getRoles();
		if($userRoles[0] != 'ROLE_ADMIN'){
			$message = "You can not delete School <button onclick='history.go(-1);'>Back </button>";
			die("$message");
		}
			parent::removeEntity($entity);
		}

Finally class shows like

<?php 
namespace App\Controller;
use App\Repository\SchoolRepository;
use App\Entity\School ;
use EasyCorp\Bundle\EasyAdminBundle\Form\Type\EasyAdminFormType;
use EasyCorp\Bundle\EasyAdminBundle\Controller\EasyAdminController;


class SchoolController extends EasyAdminController
{

	//protected function newAction(){
		
	//}


    public function persistEntity($entity)
    {
    	
    	$user = $this->getUser();
    	$userRoles = $user->getRoles();
    	

        if (method_exists($entity, 'setUserId') && $userRoles[0] != 'ROLE_ADMIN') {
            $entity->setUserId($user);
        }
 
        $userId = $entity->getUserId()->getId();
        $this->isExists($userId);
        parent::updateEntity($entity);
    }

    public function updateEntity($entity)
    {
    	$user = $this->getUser();
        if (method_exists($entity, 'setUserId')) {
            $entity->setUserId($user);
        }

        parent::updateEntity($entity);
    }

	protected function removeEntity($entity){
		$userRoles = $this->getUser()->getRoles();
		if($userRoles[0] != 'ROLE_ADMIN'){
			$message = "You can not delete School <button onclick='history.go(-1);'>Back </button>";
			die("$message");
		}
			parent::removeEntity($entity);
		}


    private function isExists($userId){
		$repository = $this->getDoctrine()->getRepository(School::class);
		$schools = $repository->findOneBy(
		    ['userId' => $userId]
		);
		if(!empty($schools)){
 			$message = "You can not create more than one School <button onclick='history.go(-1);'>Back </button>";
			die("$message");          
		}
    }

}

More details https://symfony.com/doc/master/bundles/EasyAdminBundle/book/complex-dynamic-backends.html#admincontroller-properties-and-methods