How to use registry in block?

Question

I'm trying to get registry value in my block. Here's how block looks like,

<?php
namespace Vendor\Dunning\Block\Adminhtml\Dunning\Edit\Tab;

class PartPayments extends \Magento\Backend\Block\Template
{
    protected $_template = 'Vendor_Dunning::installments.phtml';

    public function __construct(
            \Magento\Framework\Registry $registry
    ) {
        $this->registry     = $registry;
    }
}

Template is getting rendered but If I create constructor then it gives me error like below which looks dangerous to debug.

Fatal error: Method Magento\Ui\TemplateEngine\Xhtml\Result::__toString() must not throw an exception, caught Error: Call to a member function dispatch() on null in /opt/lampp/htdocs/magento2/vendor/magento/module-ui/Component/Wrapper/UiComponent.php on line 0

Please help.

Answer 1

It seems like error occurred from other code. Still, you can create registry like :

<?php
namespace Vendor\Dunning\Block\Adminhtml\Dunning\Edit\Tab;

class PartPayments extends \Magento\Backend\Block\Template
{
    /**
     * Core registry
     *
     * @var \Magento\Framework\Registry
     */
    protected $_coreRegistry = null;

    protected $_template = 'Vendor_Dunning::installments.phtml';

    public function __construct(
        \Magento\Backend\Block\Template\Context $context,
        \Magento\Framework\Registry $registry,
        array $data = []
    ) {
        $this->_coreRegistry = $registry;
        parent::__construct($context, $data);
    }
}

Reference file : Magento\Cms\Block\Adminhtml\Wysiwyg\Images/Tree.php

Answer 2

I'm using Registry in my block from getting the function of the Registry which I created in helper class n its works perfectly for me... you can give a try