Magento 2 – Undefined Property _pageResult on Admin Page

adminadminhtmlmagento2

I created route and admin menu item linked to this route, but I am getting the error message in the browser when I try to access it:

1 exception(s):
Exception #0 (Exception): Notice: Undefined property: Namespace\Mymodule\Controller\Adminhtml\Griglia\Index\Interceptor::$_resultPage in /Applications/MAMP/htdocs/magento2/app/code/Namespace/Mymodule/Controller/Adminhtml/Griglia/Index.php on line 34 ...... ............(MORE ERROR TEXT IS HERE) ....

I can see the content of the page on this route, if I cut the processing by outputting something in execute method and return;, but I want the template to load too, using the layout and template for this admin page.

Code in Controller/Adminhtmk/Griglia/Index.php is:

<?php

namespace Namespace\Mymodule\Controller\Adminhtml\Griglia;

class Index extends \Magento\Backend\App\Action
{
    protected $resultPageFactory = false;
    public function __construct(
        \Magento\Backend\App\Action\Context $context,
        \Magento\Framework\View\Result\PageFactory $resultPageFactory
    ) {
        parent::__construct($context);
        $this->resultPageFactory = $resultPageFactory;
    }

    public function execute()
    {

        //Call page factory to render layout and page content
        $this->_setPageData();
        return $this->getResultPage();
    }

    /*
     * Check permission via ACL resource
     */
    protected function _isAllowed()
    {
        return $this->_authorization->isAllowed('Namespace_Mymodule::griglia');
    }

    public function getResultPage()
    {
        if (is_null($this->_resultPage)) {
            $this->_resultPage = $this->_resultPageFactory->create();
        }
        return $this->_resultPage;
    }

    protected function _setPageData()
    {
        $resultPage = $this->getResultPage();
        $resultPage->setActiveMenu('Namespace_Mymodule::griglia');
        $resultPage->getConfig()->getTitle()->prepend((__('Posts')));


        return $this;
    }


}

Best Answer

Add this line above the constructor:

protected $_resultPage;

and in the method getResultPage replace this

$this->_resultPage = $this->_resultPageFactory->create();

with this

$this->_resultPage = $this->resultPageFactory->create();

Related Solutions

Call Model Method from Controller in Magento 2

The object manager is not the correct way to do this. Use dependency injection via the constructor whenever possible.

You are getting that error because your controller extends another class, but you are not following the parent class's constructor, or you did not clear the cache.

You have not provided your code, but I assume your controller extends \Magento\Framework\App\Action\Action. If you open that, you'll see the constructor signature for that class is:

/**
 * @param \Magento\Framework\App\Action\Context $context
 */
public function __construct(
    \Magento\Framework\App\Action\Context $context
) {
    // ...
}

You're getting the error because Magento is trying to inject a Context object, and you're asking for a Customer. To inject your model, your class constructor needs to look like this:

protected $customer;

/**
 * @param \Magento\Framework\App\Action\Context $context
 * @param \Demo\HelloWorld\Model\Customer $customer
 */
public function __construct(
    \Magento\Framework\App\Action\Context $context,
    \Demo\HelloWorld\Model\Customer $customer
) {
    $this->customer = $customer;

    parent::__construct($context);
}

Make that change, then flush the Magento cache (or folder var/cache), and then it should work.

Note: This is assuming your Customer class is injectable. If it's loaded from the database, you need to inject CustomerFactory instead, and then call $customer = $this->customerFactory->create().

Magento 2 Layout Issues – How to Fix Layout Not Loading

Your module have some error, please follow below steps to have it work,

Step1 : app/code/Test/Module/Block/Form.php

<?php 

namespace Test\Module\Block;

use Magento\Framework\View\Element\Template;

class Form  extends Template
{

}
?>

Step2: app/code/Test/Module/Controller/Index/Index.php

<?php 
namespace Test\Module\Controller\Index;
class Index extends \Magento\Framework\App\Action\Action
{
    public function execute()
    {


         $this->_view->loadLayout();

        $this->_view->renderLayout();

    }
}
?>

Step3: app/code/Test/Module/etc/frontend/routes.xml

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:App/etc/routes.xsd">
    <router id="standard">
        <route id="module" frontName="module">
            <module name="Test_Module" />
        </route>
    </router>
</config>

Step4: app/code/Test/Module/etc/module.xml

<?xml version="1.0"?>
<!--
/**
 * Copyright © 2015  All rights reserved.
 */
-->
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Module/etc/module.xsd">
  <module name="Test_Module" schema_version="1.0.0" setup_version="1.0.0"/> 
</config>

Step4 : app/code/Test/Module/view/frontend/layout/module_index_index.xml

<?xml version="1.0"?>
<!--
/**
 * Copyright © 2015 Magento. All rights reserved.
 * See COPYING.txt for license details.
 */
-->
<page layout="1column" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:View/Layout/etc/page_configuration.xsd">
<body>
    <referenceContainer name="content">
        <block class="Test\Module\Block\Form" name="form" template="Test_Module::form.phtml" />
    </referenceContainer>
       </body>
</page>

Step5: app/code/Test/Module/view/frontend/templates/form.phtml

<h1>Hello</h1>

Step6: app/code/Test/Module/registration.php

<?php
\Magento\Framework\Component\ComponentRegistrar::register(
    \Magento\Framework\Component\ComponentRegistrar::MODULE,
    'Test_Module',
    __DIR__
);
?>

After running php bin/magento setup:upgrade it will show output@url localhost/magentoce27/index.php/module/index/index

Best Answer

Related Solutions

Call Model Method from Controller in Magento 2

Magento 2 Layout Issues – How to Fix Layout Not Loading

Related Topic