Update Const template at Magento 2 Class

Question

I need to update a template defined in a Constant at Configurable Class(Magento/Swatches/Block/Product/Renderer/Configurable.php).

I tried with a Plugin, but how the function which gets the constant is protected, I can't update the Constant correctly.

Anyone knows the correct way to update this constant or rewrite the function to change the path to my Module template.

const CONFIGURABLE_RENDERER_TEMPLATE = 'Magento_ConfigurableProduct::product/view/type/options/configurable.phtml';

protected function getRendererTemplate() { return $this->isProductHasSwatchAttribute ? self::SWATCH_RENDERER_TEMPLATE : self::CONFIGURABLE_RENDERER_TEMPLATE; }

• JuanP Barba: The function getRendererTemplate runs into _toHtml() how a parameter of setTemplate().

Answer 1

You can create before plugin on setTemplate method and overwrite template argument.

Create plugin

class ProductSwatchPlugin
{
 public function beforeSetTemplate(
 \Magento\Swatches\Block\Product\Renderer\Configurable $subject,
 $template
 ) {
 return ['You_Module::template.phtml'];
 }
}

and declare it in DI.xml

<type name="\Magento\Swatches\Block\Product\Renderer\Configurable">
 <plugin name="you_module_change_template" type="ProductSwatchPlugin" />
</type>

See more details in official documentation

• JuanP Barba: Can you specify how to do it? When I do beforeSetTemplate(){...} I'm overwriting the template of the page and not of the output of _toHtml() function...
• KAndy: I add details to answer. _toHtml() call setTemplate

Answer 2

An alternative is to override it using dependency injection.

Modify di.xml

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../../../../../vendor/magento/framework/ObjectManager/etc/config.xsd">
 <preference for="Magento\Swatches\Block\Product\Renderer\Configurable" type="vendorName\moduleName\Block\Rewrite\Product\Renderer\Configurable" />
</config>

Create app/code/vendorName/moduleName/Block/Rewrite/Product/Renderer/Configurable.php

namespace vendorName\moduleName\Block\Rewrite\Product\Renderer;
class Configurable extends \Magento\Swatches\Block\Product\Renderer\Configurable {
 protected function getRendererTemplate() {
 return $this->isProductHasSwatchAttribute ?
 self::SWATCH_RENDERER_TEMPLATE : 'vendorName_moduleName::product/view/type/options/configurable.phtml';
 }
}

Create app/code/vendorName/moduleName/product/view/type/options/configurable.phtml to override the template.