Magento 2 object manager quick overview can help your business.
Compared to other programming languages, object-oriented programming has been around since PHP 5 and contains a lot of limitations.
In Magento 1, almost all objects are implemented and called through the Mage class. In Magento 2, Object Manager is used to replace the Mage class. This helps to resolve some of the problems when you instantiate parameters by creating tight relationships between 3 patterns: object management, dependency injection, and plugins.
In Magento 2, there’s no reason why you can’t use regular PHP classes. However, you’ll need to use Magento’s object manager to take advantage of Magento 2’s advanced object features (automated constructor dependency injection, object proxying, and so on).
Mechanism
The Object Manager is mainly responsible for the instantiation and configuration of an Object through two main methods: GET, CREATE.
- The GET method returns a singleton object (an instance of the class shared among components when running Magento).
vendor/magento/framework/ObjectManager/ObjectManager.php::get()
- The CREATE method returns an entirely new object (a new class instance).
vendor/magento/framework/ObjectManager/ObjectManager.php::create()
Therefore, if you call the GET method from 2 places, the same result will be generated. Otherwise, you will get a new object using the CREATE method.
Object Manager configuration
The di.xml file configures the object manager and tells it how to handle dependency injection
This file specifies the preferred implementation class the object manager creates for the interface declared in a constructor class. The file also determines whether the object manager will create an object for every request or the object is a singleton.
Object Manager’s goal
- Use the object manager to instantiate and insert the declaration class in the constructor.
The object manager can be instantiated in a php class; it can be a model, hepler, or block. Unless the class we are working on has received an instance of the object manager, we can obtain it by passing ObjectManagerInterface to the constructor class like below:
public function __construct(
\Magento\Framework\ObjectManagerInterface $objectManager
) {
$this->_objectManager = $objectManager;
}
- Implement the singleton pattern (learn more at https://en.wikipedia.org/wiki/Singleton_pattern)
- Manage dependencies
- Automatically initialize parameters
According to Magento’s core group, you should not use Object Manager in modules because it makes the class lose dependency injection.
You can use Object Manager in the following exceptions:
- Use Object manager in static magic methods such as __wakeup (), __sleep (), …
- Use Object manager to maintain backward compatibility for a constructor
- The Object manager can depend on classes used to create objects like factories or proxies.
Conclusion
Magento 2 Object Manager is a handy tool for your Magento 2 store. Kindly check the article about Magento 2 Object Manager we provided, and you will know everything about it.
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