add functionality

src/Twig/Environment.php

@@ -2,6 +2,7 @@
 
 namespace App\Twig;
 
+use EasyCorp\Bundle\EasyAdminBundle\Dto\FieldDto;
 use Twig\Extension\AbstractExtension;
 use Twig\TwigFunction;
 
@@ -9,11 +10,22 @@ class Environment extends AbstractExtension
 {
     public function getFunctions(): array
     {
-        return [new TwigFunction('env', $this->getVar(...))];
+        return [
+            new TwigFunction('env', $this->getVar(...)),
+            new TwigFunction('entityId', $this->getEntityId(...)),
+        ];
     }
 
     public function getVar(string $name): string
     {
         return $_ENV[$name];
     }
+
+    public function getEntityId(FieldDto $field): string
+    {
+        $url = $field->getCustomOption('toggleUrl');
+        preg_match('/entityId=(\d+)/', $url, $matches);
+
+        return $matches[1];
+    }
 }