Kdjykuj

So instead of update the student, this code add a new student.

I'm looking for a way that not using object manager, because the objectmanager is recommended not to use.

So when i searching for how to update a product in magento 2, i found alot of objectmanager way, but like i said, i wont use them.

I found 2 other ways, 1st way is using factory only, the 2nd way is using resource model and factory.

So here is the code :

namespace FuduHelloWorldControllerAdminhtmlStudent;



use MagentoBackendAppActionContext;

use FuduHelloWorldModelStudentsFactory;

use FuduHelloWorldModelResourceModelStudents as ResourceModel;



class Update extends MagentoFrameworkAppActionAction

{

    /**

     * @var StudentsFactory

     */

    protected $studentsFactory;



/**

 * @var ResourceModel

 */

protected $resourceModel;



public function __construct(

    Context $context,

    StudentsFactory $studentsFactory,

    ResourceModel $resourceModel

) {

    $this->resourceModel = $resourceModel;

    $this->studentsFactory = $studentsFactory;



    parent::__construct($context);

}

/**

 * Save action

 *

 * @SuppressWarnings(PHPMD.CyclomaticComplexity)

 * @return MagentoFrameworkControllerResultInterface

 */

public function execute()

{

    $data = $this->getRequest()->getPostValue();



    /** @var MagentoBackendModelViewResultRedirect $resultRedirect */

    $resultRedirect = $this->resultRedirectFactory->create();

//

        if ($data) {

            try{

                /** @var FuduHelloWorldModelStudents $model */



            $id = $this->getRequest()->getParam('id');



//                The 1st way :

                $model = $this->studentsFactory->create()->load($id);

                $model->setData($data);

                $model->save();



//                  The 2nd way :

//                $model = $this->studentsFactory->create();

//                $resource = $this->resourceModel->load($model,$id);

//                $model->setData($data);

//                $resource->save($model);





            $this->messageManager->addSuccessMessage(__('Update Student Successfully.'));



            // Redirect to your form page (or anywhere you want...)

            $resultRedirect->setPath('students/student/index');



            return $resultRedirect;

        }

        catch (Exception $e) {

            $this->messageManager->addErrorMessage($e->getMessage());

        }



    }

}

}

Thanks for reading, and have a good day

$model->setData($data); this line reset your data. If there id field present $data variable then your code working fine. Otherwise you need to set id for update. Check following code:

$id = $this->getRequest()->getParam('id');

$model = $this->studentsFactory->create()->load($id);

if ($model->getId()) {

   $model->setData($data);

   $model->setId($id);

} else {

    $model->setData($data);

}



$model->save();

Try to use this below code :

namespace FuduHelloWorldControllerAdminhtmlStudent;



use MagentoBackendAppActionContext;

use FuduHelloWorldModelStudentsFactory;



class Update extends MagentoFrameworkAppActionAction

{

    /**

     * @var StudentsFactory

     */

    protected $studentsFactory;





    public function __construct(

        Context $context,

        StudentsFactory $studentsFactory

    ) {

        $this->studentsFactory = $studentsFactory;

        parent::__construct($context);

    }



    public function execute()

    {

        $data = $this->getRequest()->getPostValue();



        /** @var MagentoBackendModelViewResultRedirect $resultRedirect */



            if ($data) {

                try {

                $model = $this->studentsFactory->create();

                $model->setData($data);

                $model->save();



                $this->messageManager->addSuccessMessage(__('Add data Successfully.'));

                $resultRedirect->setPath('students/student/index');

                return $resultRedirect;

            }

            catch (Exception $e) {

                $this->messageManager->addErrorMessage($e->getMessage());

            }



        }

    }

}

Remove generation and check it.