Kdjykuj

i'm doing update "students" on magento 2.2.5

and i'm stuck in how to get student data by id

the error say:

1 exception(s):

Exception #0 (InvalidArgumentException): Invalid return type

here is my code:

<?php



namespace FuduHelloWorldControllerAdminhtmlStudent;



use MagentoBackendAppAction;

use FuduHelloWorldModelStudentsFactory;

use MagentoFrameworkExceptionNoSuchEntityException;



class Update extends Action

{



/**

 * @var StudentsFactory

 */

protected $studentsFactory;



public function __construct(

    ActionContext $context,

    StudentsFactory $studentsFactory

)

{

    $this->studentsFactory = $studentsFactory;

    parent::__construct($context);

}



/**

 *  Load Student data by given Student Id

 *

 * @return $student

 * @throws NoSuchEntityException

 */



public function execute()

{



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

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

    $student->load($id);



    return $student;

}

}

Reason for error is you can not return Object type of FuduHelloWorldModelStudentsFactory In controller execute method.

Return type for controller should be :

• 
  “Json” result (return json type of data)


• 
  “Raw” result (plain string)


• 
  “Forward” result ($result->forward('noroute'); )


• 
  “Redirect” result ( $result->setPath('');)

You can read more on it source

@return $student to @return FuduHelloWorldModelStudents

/**

 *  Load Student data by given Student Id

 *

 * @return FuduHelloWorldModelStudents

 * @throws NoSuchEntityException

 */



public function execute()

{



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

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

    $student->load($id);



    return $student;

}

Turn out i cant use controller to return a object, and i have to use block to do that.
so my block is

 public function getStudentById(){

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

    $student = $this->_studentsFactory->create();

    $student->load($id);

    return $student;

}

and then in my phtml file

<?php /** @var FuduHelloWorldBlockAdminhtmlStudentsBlock $block */ ?>

<form action="<?php echo $block->getPostUpdateStudentsUrl() ?>" method="post"

      style="border: 1px solid black; width: 200px; height: 250px; padding-left:10px;">



    Name:<br>

    <input type="text" name="name" required value=<?php echo $block->getStudentById()->getName() ?>>

    <br>



    Class:<br>

    <input type="number" name="class_id" value=<?php echo $block->getStudentById()->getName() ?>>

    <br>



    Gender:<br>

    <input type="text" name="gender" value=<?php echo $block->getStudentById()->getName() ?>>

    <br>



    Age:<br>

    <input type="number" name="age" value=<?php echo $block->getStudentById()->getName() ?>>

    <br><br>



    <input type="submit" value="Submit">



</form>

thanks all for your help.