example.php

<?php

// https://forum.nette.org/cs/22304-zavislost-jednoho-modelu-na-jinych

	/**
	 * @param Closure $callback
	 */
	private function doInTransaction(Closure $callback)
	{
		$this->isInTransaction = TRUE;
		$callback();
		$this->isInTransaction = FALSE;
	}
	
	
	// usage
	// any class
	private $isInTransaction = FALSE;
	
	
	
	/**
	 * @param int $id
	 * @param Player $owner
	 */
	public function __construct($id, Player $owner)
	{
		$this->id = $id;
		$this->owner = $owner;

		$this->doInTransaction(function () use ($owner) {
			$owner->receiveItem($this);
		});
	}



	/**
	 * @param Player $newOwner
	 */
	public function changeOwner(Player $newOwner)
	{
		if ($this->owner !== $newOwner) {
		  $this->doInTransaction(function () use ($newOwner) {
				$this->owner->giveItem($this);
				$this->owner = $newOwner;
				$this->owner->receiveItem($this);
			});
		}
	}