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I have some confusion while use Factory pattern vs new instance object.

What difference between them?

$object = objectManager->create() vs objectManager->create('ObjectFactory')

what benefits in cases when create object by Factory.

This thread may be large but I need core team members to help me clearly minds

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You should not use $objectManager directly because it takes control from clients of your code and leads to higher code coupling

We split all objects to two groups: injectables & non-injectables.

Injectables - all services, mostly stateless classes like FrontController or EventManager should be requested in object constructors.

Non-Injectables - all entities, mostly stateful objects like Product or Category should be created through Factories. And Factories should be requested in constructors.

You can read more here: http://devdocs.magento.com/guides/v2.0/extension-dev-guide/depend-inj.html#dep-inj-mod-type-life-mgmt

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  • Sometime i got null object while use factory. It related to shared object create?
    – mrtuvn
    Feb 4, 2016 at 16:20
  • What do you mean by null object? Is it null value?
    – Anton Kril
    Feb 4, 2016 at 16:27
  • i request model factory from block by ->create('id') like this. Results get null. May be i am doing wrong somewhere
    – mrtuvn
    Feb 5, 2016 at 4:40
  • I have a question. I have a model, how to get id of this model use Factory, I should get id in model or model resourceCollection. Magento 2 use getId and getById somewhere, it make me some confusing
    – mrtuvn
    Feb 24, 2016 at 3:15
  • to create a model you use $modelFactory->create(); To load a Model directly from a Factory you can use $modelFactory->create()->load($id); To get the ID of a Model you use $model->getId(); The getById($id) is typical for Repositories which can also create you modelinstancens like $modelRepository->getById($id)
    – David Verholen
    Feb 24, 2016 at 3:27

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