Delete operation in Magento 2

Let’s give our blog writer an option for deleting his/her blog. After this, we will have completed the CRUD operations.

Just like before we need to edit the view/frontend/templates/list.phtml

Updated code for view/frontend/templates/list.phtml file

<table>
    <tr>
        <th>
            <?= __("Id")?>
        </th>
        <th>
            <?= __("Title")?>
        </th>
        <th>
            <?= __("Content")?>
        </th>
        <th>
            <?= __("Edit")?>
        </th>
        <th>
            <?= __("Delete")?>
        </th>
    </tr>
    <?php
    $blogs = $block->getBlogs();

    foreach ($blogs as $blog) {?>
    <tr>
        <td>
            <?= $escaper->escapeHtml($blog->getId())?>
        </td>
        <td>
            <?= $escaper->escapeHtml($blog->getTitle())?>
        </td>
        <td>
            <?= substr($escaper->escapeHtml($blog->getContent()), 0, 20).'...'?>
        </td>
        <td>
            <a href="<?= $escaper->escapeUrl($block->getUrl('blog/manage/edit', ['id'=>$escaper->escapeHtml($blog->getId())]))?>">
                <?= __('Edit') ?>
            </a>
        </td>
        <td>
            <a href="<?= $escaper->escapeUrl($block->getUrl('blog/manage/delete', ['id'=>$escaper->escapeHtml($blog->getId())]))?>"
                onclick="return confirm('Are you sure you want to delete this blog?');">
                <?= __('Delete') ?>
            </a>
        </td>
    </tr>
    <?php } ?>
</table>

Here we have added another column “Delete” and in the delete link we have used javascript’s confirm dialog.

We will redirect the user to the list page after deleting the blog. So we just need to create the controller file. Please check the readymade Magento 2 Blog Extension

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Let’s create Controller/Manage/Delete.php file,

Code for Controller/Manage/Delete.php file

<?php
namespace Webkul\BlogManager\Controller\Manage;

use Magento\Customer\Controller\AbstractAccount;
use Magento\Framework\App\Action\Context;
use Magento\Customer\Model\Session;

class Delete extends AbstractAccount
{
    /**
     * @var \Webkul\BlogManager\Model\BlogFactory
     */
    protected $blogFactory;

    /**
     * @var Magento\Customer\Model\Session
     */
    protected $customerSession;

    /**
     * @var \Magento\Framework\Message\ManagerInterface
     */
    protected $messageManager;

    /**
     * Dependency Initilization
     *
     * @param Context $context
     * @param \Webkul\BlogManager\Model\BlogFactory $blogFactory
     * @param Session $customerSession
     * @param \Magento\Framework\Message\ManagerInterface $messageManager
     */
    public function __construct(
        Context $context,
        \Webkul\BlogManager\Model\BlogFactory $blogFactory,
        Session $customerSession,
        \Magento\Framework\Message\ManagerInterface $messageManager
    ) {
        $this->blogFactory = $blogFactory;
        $this->customerSession = $customerSession;
        $this->messageManager = $messageManager;
        parent::__construct($context);
    }

    /**
     * Provides content
     *
     * @return Magento\Framework\Controller\Result\Redirect
     */
    public function execute()
    {
        $blogId = $this->getRequest()->getParam('id');
        $customerId = $this->customerSession->getCustomerId();
        $isAuthorised = $this->blogFactory->create()
                                    ->getCollection()
                                    ->addFieldToFilter('user_id', $customerId)
                                    ->addFieldToFilter('entity_id', $blogId)
                                    ->getSize();
        if (!$isAuthorised) {
            $this->messageManager->addError(__('You are not authorised to delete this blog.'));
            return $this->resultRedirectFactory->create()->setPath('blog/manage');
        } else {
            $model = $this->blogFactory->create()->load($blogId);
            $model->delete();
            $this->messageManager->addSuccess(__('You have successfully deleted the blog.'));
        }     
        return $this->resultRedirectFactory->create()->setPath('blog/manage');
    }
}

There is nothing much to talk about here because we have seen very similar codes before also. The only thing you have to notice is the $model->delete() method. After loading the model we have deleted it with the delete() method and we have redirected to the list page.