Try Rector Online | Rector - Automated Way to Instantly Upgrade and Refactor any PHP code

Run Rector on your code to see what it can do for you:

 <?php
 
  use Doctrine\ORM\Mapping as ORM;

       */
      private $trainings;
 
-     /**
-      * @return \Doctrine\Common\Collections\Collection<string, Training>
-      */
+     /**
+      * @return \Doctrine\Common\Collections\Collection<int, \Training>
+      */
      public function getTrainings()
      {
          return $this->trainings;
      }
  }

PHP snippet to change

<?php

 use Doctrine\ORM\Mapping as ORM;

 /**
  * @ORM\Entity
  */
 final class Trainer
 {
     /**
      * @ORM\OneToMany(targetEntity=Training::class, indexBy=someField)
      * @var \Doctrine\Common\Collections\Collection<string, Training>
      */
     private $trainings;

     /**
      * @return \Doctrine\Common\Collections\Collection<string, Training>
      */
     public function getTrainings()
     {
         return $this->trainings;
     }
 }

Applied Rules:

CompleteReturnDocblockFromToManyRector

Not a change you expect?

Create an issue on GitHub
...or to speed up fix – add a test fixture

Config rector.php

<?php

use Rector\Config\RectorConfig;
use Rector\Doctrine\TypedCollections\Rector\Class_\CompleteReturnDocblockFromToManyRector;

return RectorConfig::configure()
    ->withRules([
        CompleteReturnDocblockFromToManyRector::class,
    ]);

Rector version: b09565 - released at 2026-05-25 06:37