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i'm editing a Magento 2 module. If i install the module via composer require, then run all the necessary commands, the module works.

If i manually copy the module files from vendor/{vendorname}/{modulename} to app/code/{vendorname}/{modulename}, then uninstall the vendor module via composer+all the necessary commands, then i enable the module present in app/code with the necessary commands, this is the result: error in dashboard

And this is the resulting system.log:

[2022-10-21T14:57:47.998332+00:00] main.CRITICAL: Error: Class "Mynamespace\Helper\Data" not found in /var/www/magento2-domain/vendor/magento/framework/ObjectManager/Factory/AbstractFactory.php:121
Stack trace:
#0 /var/www/magento2-domain/vendor/magento/framework/ObjectManager/Factory/Compiled.php(108): Magento\Framework\ObjectManager\Factory\AbstractFactory->createObject()
#1 /var/www/magento2-domain/vendor/magento/framework/ObjectManager/Factory/Compiled.php(150): Magento\Framework\ObjectManager\Factory\Compiled->create()
#2 /var/www/magento2-domain/vendor/magento/framework/ObjectManager/Factory/Compiled.php(79): Magento\Framework\ObjectManager\Factory\Compiled->get()
#3 /var/www/magento2-domain/vendor/magento/framework/ObjectManager/ObjectManager.php(56): Magento\Framework\ObjectManager\Factory\Compiled->create()
#4 /var/www/magento2-domain/vendor/magento/framework/View/Element/BlockFactory.php(44): Magento\Framework\ObjectManager\ObjectManager->create()
#5 /var/www/magento2-domain/vendor/magento/framework/View/Layout/Generator/Block.php(272): Magento\Framework\View\Element\BlockFactory->createBlock()
#6 /var/www/magento2-domain/vendor/magento/framework/View/Layout/Generator/Block.php(252): Magento\Framework\View\Layout\Generator\Block->getBlockInstance()
#7 /var/www/magento2-domain/vendor/magento/framework/View/Layout/Generator/Block.php(229): Magento\Framework\View\Layout\Generator\Block->createBlock()
#8 /var/www/magento2-domain/vendor/magento/framework/View/Layout/Generator/Block.php(134): Magento\Framework\View\Layout\Generator\Block->generateBlock()
#9 /var/www/magento2-domain/vendor/magento/framework/View/Layout/GeneratorPool.php(93): Magento\Framework\View\Layout\Generator\Block->process()
#10 /var/www/magento2-domain/vendor/magento/framework/View/Layout.php(365): Magento\Framework\View\Layout\GeneratorPool->process()
#11 /var/www/magento2-domain/vendor/magento/framework/Interception/Interceptor.php(58): Magento\Framework\View\Layout->generateElements()
#12 /var/www/magento2-domain/vendor/magento/framework/Interception/Interceptor.php(138): Magento\Framework\View\Layout\Interceptor->___callParent()
#13 /var/www/magento2-domain/vendor/magento/framework/Interception/Interceptor.php(153): Magento\Framework\View\Layout\Interceptor->Magento\Framework\Interception\{closure}()
#14 /var/www/magento2-domain/generated/code/Magento/Framework/View/Layout/Interceptor.php(32): Magento\Framework\View\Layout\Interceptor->___callPlugins()
#15 /var/www/magento2-domain/vendor/magento/framework/View/Layout/Builder.php(129): Magento\Framework\View\Layout\Interceptor->generateElements()
#16 /var/www/magento2-domain/vendor/magento/framework/View/Page/Builder.php(65): Magento\Framework\View\Layout\Builder->generateLayoutBlocks()
#17 /var/www/magento2-domain/vendor/magento/framework/View/Layout/Builder.php(65): Magento\Framework\View\Page\Builder->generateLayoutBlocks()
#18 /var/www/magento2-domain/vendor/magento/framework/View/Layout.php(271): Magento\Framework\View\Layout\Builder->build()
#19 /var/www/magento2-domain/vendor/magento/framework/View/Layout.php(896): Magento\Framework\View\Layout->build()
#20 /var/www/magento2-domain/vendor/magento/module-cms/Helper/Page.php(216): Magento\Framework\View\Layout->getBlock()
#21 /var/www/magento2-domain/vendor/magento/module-cms/Controller/Index/Index.php(74): Magento\Cms\Helper\Page->prepareResultPage()
#22 /var/www/magento2-domain/vendor/magento/framework/Interception/Interceptor.php(58): Magento\Cms\Controller\Index\Index->execute()
#23 /var/www/magento2-domain/vendor/magento/framework/Interception/Interceptor.php(138): Magento\Cms\Controller\Index\Index\Interceptor->___callParent()
#24 /var/www/magento2-domain/vendor/magento/framework/Interception/Interceptor.php(153): Magento\Cms\Controller\Index\Index\Interceptor->Magento\Framework\Interception\{closure}()
#25 /var/www/magento2-domain/generated/code/Magento/Cms/Controller/Index/Index/Interceptor.php(23): Magento\Cms\Controller\Index\Index\Interceptor->___callPlugins()
#26 /var/www/magento2-domain/vendor/magento/framework/App/Action/Action.php(111): Magento\Cms\Controller\Index\Index\Interceptor->execute()
#27 /var/www/magento2-domain/vendor/magento/framework/Interception/Interceptor.php(58): Magento\Framework\App\Action\Action->dispatch()
#28 /var/www/magento2-domain/vendor/magento/framework/Interception/Interceptor.php(138): Magento\Cms\Controller\Index\Index\Interceptor->___callParent()
#29 /var/www/magento2-domain/vendor/magento/framework/Interception/Interceptor.php(153): Magento\Cms\Controller\Index\Index\Interceptor->Magento\Framework\Interception\{closure}()
#30 /var/www/magento2-domain/generated/code/Magento/Cms/Controller/Index/Index/Interceptor.php(32): Magento\Cms\Controller\Index\Index\Interceptor->___callPlugins()
#31 /var/www/magento2-domain/vendor/magento/framework/App/FrontController.php(245): Magento\Cms\Controller\Index\Index\Interceptor->dispatch()
#32 /var/www/magento2-domain/vendor/magento/framework/App/FrontController.php(212): Magento\Framework\App\FrontController->getActionResponse()
#33 /var/www/magento2-domain/vendor/magento/framework/App/FrontController.php(147): Magento\Framework\App\FrontController->processRequest()
#34 /var/www/magento2-domain/vendor/magento/framework/Interception/Interceptor.php(58): Magento\Framework\App\FrontController->dispatch()
#35 /var/www/magento2-domain/vendor/magento/framework/Interception/Interceptor.php(138): Magento\Framework\App\FrontController\Interceptor->___callParent()
#36 /var/www/magento2-domain/vendor/magento/module-store/App/FrontController/Plugin/RequestPreprocessor.php(99): Magento\Framework\App\FrontController\Interceptor->Magento\Framework\Interception\{closure}()
#37 /var/www/magento2-domain/vendor/magento/framework/Interception/Interceptor.php(135): Magento\Store\App\FrontController\Plugin\RequestPreprocessor->aroundDispatch()
#38 /var/www/magento2-domain/vendor/magento/module-page-cache/Model/App/FrontController/BuiltinPlugin.php(75): Magento\Framework\App\FrontController\Interceptor->Magento\Framework\Interception\{closure}()
#39 /var/www/magento2-domain/vendor/magento/framework/Interception/Interceptor.php(135): Magento\PageCache\Model\App\FrontController\BuiltinPlugin->aroundDispatch()
#40 /var/www/magento2-domain/vendor/magento/framework/Interception/Interceptor.php(153): Magento\Framework\App\FrontController\Interceptor->Magento\Framework\Interception\{closure}()
#41 /var/www/magento2-domain/generated/code/Magento/Framework/App/FrontController/Interceptor.php(23): Magento\Framework\App\FrontController\Interceptor->___callPlugins()
#42 /var/www/magento2-domain/vendor/magento/framework/App/Http.php(116): Magento\Framework\App\FrontController\Interceptor->dispatch()
#43 /var/www/magento2-domain/vendor/magento/framework/App/Bootstrap.php(264): Magento\Framework\App\Http->launch()
#44 /var/www/magento2-domain/pub/index.php(30): Magento\Framework\App\Bootstrap->run()
#45 {main} [] []

From this log it seems that magento cannot find one of my module's classes, as if the class has not been autoloaded.

So my question is: How is it possible that the EXACT same module works when placed in the vendor folder via composer, but doesn't work when manually placed under app/code ??

The module is evidently working when placed in vendor, hence the code is correct.

Isn't app/code meant to be used for the live development of modules?? Am i missing something?


Please note: after i moved the module to app/code i ran the following commands:

  composer install
  composer dump-autoload
  bin/magento module:status
  bin/magento module:enable Companyname_Modulename --clear-static-content
  bin/magento setup:upgrade
  bin/magento setup:di:compile
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  • as i said in the post, it seems that the autoloading of classes doesn't work when the code is placed in app/code. is that correct? how to fix this?
    – aetonsi
    Commented Oct 21, 2022 at 15:32

1 Answer 1

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Modules from vendor can move to app/code, and it works fine.

Make sure you set the correct namespace (folders name) with case sensitive for vendorname and modulename in app/code:

The correct namespace gets from componentName param in vendor/vendorname/modulename/registration.php, or some path related like vendor/vendorname/src/modulename/registration.php, it depend on how the vendor build the structure.

eg: vendor/aetonsi/catalog/registration.php has componentName is Aetonsi_Catalog, you should change to app/code/Aetonsi/Catalog

2
  • dammit it works... the composer package has a different name than the namespace used internally (company/vendor name matches, but package is named differently)..... could you please kindly point me to a documentation of some sort where you found this information? i didn't read this anywhere when researching... Thank you !!!
    – aetonsi
    Commented Oct 24, 2022 at 8:42
  • I earned this knowledge from reading Magento core code, Magento devdocs,... with working experience. Now you know all about that! If you have any issues, post them to this Magento Stack Exchange, I and more people here can help.
    – Tu Van
    Commented Oct 24, 2022 at 9:05

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