How to get the protected property from core module to custom module in magento 2

Question

I have created the block file which extends \Magento\Config\Block\System\Config\Form\Field\FieldArray\AbstractFieldArray from Module-Config. Now I need to get Protected property from the above core file. Please provide me a solution

\Magento\Config\Block\System\Config\Form\Field\FieldArray\AbstractFieldArray

 public function addColumn($name, $params) { $this->_columns[$name] = [ 'label' => $this->_getParam($params, 'label', 'Column'), 'size' => $this->_getParam($params, 'size', false), 'style' => $this->_getParam($params, 'style'), 'class' => $this->_getParam($params, 'class'), 'renderer' => false, ]; if (!empty($params['renderer']) && $params['renderer'] instanceof \Magento\Framework\View\Element\AbstractBlock) { $this->_columns[$name]['renderer'] = $params['renderer']; } }

I need to get "_columns" to my custom template System.xml

<field id="fieldslide" translate="label" type="text" sortOrder="10" showInDefault="1" showInWebsite="1" showInStore="1" canRestore="1"> <label>Small image</label> <frontend_model>X\Y\Block\Adminhtml\System\Config</frontend_model> <backend_model>Magento\Config\Model\Config\Backend\Serialized\ArraySerialized</backend_model> <comment>Image size should be in Bytes(1 KB = 1024 Bytes, 10 KB = 10240 Bytes, 50 KB = 51200 Bytes, 100 KB = 102400 Bytes, 150 KB = 153600 Bytes)</comment> </field>

You can use this property in the class which inherits it. what's the error that you are getting? — Manish Joy
– Manish Joy, Commented Jan 12, 2018 at 10:32

K. Maliszewski · Accepted Answer · 2018-01-12 10:38:38Z

Protected methods / class are available from exteding class. Only private are blocked.

So, when your Block extends a parent class which has protected _columns property, then you should have a access to it

Aman Alam · Accepted Answer · 2018-01-12 11:16:57Z

Here is the solution and how your serializer should look.

<field id="sampleid" translate="label" sortOrder="11" showInDefault="1" showInWebsite="1" showInStore="1"> <label>Sample Label</label> <frontend_model>Namespace\Module\Block\Adminhtml\System\Config\Form\Field\AnyblockName</frontend_model> <backend_model>Magento\Config\Model\Config\Backend\Serialized</backend_model> <comment>Image size should be in Bytes(1 KB = 1024 Bytes, 10 KB = 10240 Bytes, 50 KB = 51200 Bytes, 100 KB = 102400 Bytes, 150 KB = 153600 Bytes)</comment> </field>

You block file should look like this. Namespace\Module\Block\Adminhtml\System\Config\Form\Field\AnyblockName.php

<?php namespace Namespace\Module\Block\Adminhtml\System\Config\Form\Field; class AnyblockName extends \Magento\Config\Block\System\Config\Form\Field\FieldArray\AbstractFieldArray { protected function _prepareToRender() { $this->addColumn('col_1', [ 'label' => __('Column 1') ]); $this->addColumn('col_2', [ 'label' => __('Column 2') ]); $this->addColumn('position', [ 'label' => __('Position') ]); $this->_addAfter = false; $this->_addButtonLabel = __('Add'); } }

Thank you Aman Alam, But I need to use _columns in my Template. And I have found the solution which is present in array.phtml in Moduel-config — Jaisa
– Jaisa, Commented Jan 12, 2018 at 11:19

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