Magento 2 - Replacing an injected argument via constructor throws an error

Question

I am trying to replace an argument via configuration file (di.xml)that's been injected in constructor but it throws an error. Any help will be appreciated

Fatal error: Uncaught TypeError: Argument 1 passed to Mage2\VirtualTypes\Model\Device::__construct() must be an instance of Mage2\VirtualTypes\Model\Apple, instance of Mage2\VirtualTypes\Model\Android given, called in /var/www/html/vendor/magento/framework/ObjectManager/Factory/AbstractFactory.php on line 93 and defined in /var/www/html/app/code/Mage2/VirtualTypes/Model/Device.php:15 Stack trace:

I removed var/generation, var/di and var/cache folders but it doesn't help. Here is my code sample

class Device implements DeviceInterface
{
 /**
 * @var Apple
 */
 protected $apple;
 /**
 * Device constructor.
 * @param Apple $apple
 */
 public function __construct(Apple $apple)
 {
 $this->apple = $apple;
 }
}

di.xml file

<type name="Mage2\VirtualTypes\Model\Device"> <arguments> <argument name="apple" xsi:type="object">Mage2\VirtualTypes\Model\Android</argument> </arguments> </type>

And Android class looks like

class Android
{
 /**
 * @var AndroidList
 */
 protected $androidList;
 /**
 * Android constructor.
 * @param AndroidList $androidList
 */
 public function __construct(AndroidList $androidList)
 {
 $this->androidList = $androidList;
 }
}

• Sohel Rana: Your Android class must be inherite from Apple class.
• Qaiser Ali Bangash: Ah thank you @SohelRana. I forgot to extend it from Apple class

Answer 1

I forgot to extend the Android class from Apple and below is the correct sample code

class Device implements DeviceInterface
{
 /**
 * @var Apple
 */
 protected $apple;
 /**
 * Device constructor.
 * @param Apple $apple
 */
 public function __construct(Apple $apple)
 {
 $this->apple = $apple;
 }
}

di.xml file

<type name="Mage2\VirtualTypes\Model\Device"> <arguments> <argument name="apple" xsi:type="object">Mage2\VirtualTypes\Model\Android</argument> </arguments> </type>

Android class

class Android extends Apple
{
 /**
 * @var AndroidList
 */
 protected $androidList;
 /**
 * Android constructor.
 * @param AndroidList $androidList
 */
 public function __construct(AndroidList $androidList)
 {
 $this->androidList = $androidList;
 }
}