How to get Custom Model in a block that extends Block \Magento\Catalog\Block\Product\View?

Question

I have block named custom.product

namespace Myaddon\CustomProduct\Block\Product;
use Magento\Framework\View\Element\Template;

class Custom extends \Magento\Catalog\Block\Product\View
{       
    protected function _toHtml()
    {           
        $this->setModuleName($this->extractModuleName('Magento\Catalog\Block\Product\View'));

        $this->getLayout()->getBlock('custom.product')->setTemplate('Myaddon_CustomProduct::custom.phtml');

        return parent::_toHtml();;
    }

    public function getCustomProduct(\Myaddon\CustomProduct\Model\CustomProduct $customProduct){

        $a = $this->customProduct->getCollection();
        echo count($a); die('xxx');

    }
}

When i run the above code, I get error. So please tell me what's wrong?

Recoverable Error: Argument 1 passed to Myaddon\CustomProduct\Block\Product\Custom::getCustomProduct() must be an instance of Myaddon\CustomProduct\Model\CustomProduct, none given, called in C:\localhost\magento2-2.0.0-rc\app\code\Myaddon\CustomProduct\view\frontend\templates\custom.phtml on line 1 and defined in C:\localhost\magento2-2.0.0-rc\app\code\Myaddon\CustomProduct\Block\Product\Custom.php on line 21 [] []

Answer 1

use plugin concept to extend How to Override Core Block, Model and controller in Magento2

or if toy need collection in your custom block then use

<?php
namespace Sugarcode\Test\Block;

class Test extends \Magento\Framework\View\Element\Template
{
    protected $_coreRegistry = null;
    protected $_testmodel;

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



    public function _prepareLayout()
    {
        return parent::_prepareLayout();
    }
    public function getAllData()
    {

        //$data = $this->_testmodel->load(1);
        $datas = $this->_testmodel->getCollection();
        return $datas;
    }


}

in phtml file call

$this->getAllData();

Answer 2

As per the error, you are not passing any argument to getCustomProduct. You also have to declare usage of customProductFactory at the top of the file. In order to use colleciton like $this->customproduct->getCollection(), you need to declare protected variable and initialize it with customProduct model, or use an object manager. Also for getting collection from model you have to write create()->getCollection()...

so try this code:

namespace Myaddon\CustomProduct\Block\Product;
use Myaddon\CustomProduct\Model\CustomProductFactory;
use Magento\Framework\View\Element\Template;

class Custom extends \Magento\Catalog\Block\Product\View
{       
    protected $customProduct; 

    public function __construct(
    \Magento\Catalog\Block\Product\Context $context,
    \Magento\Framework\Url\EncoderInterface $urlEncoder,
    \Magento\Framework\Json\EncoderInterface $jsonEncoder,
    \Magento\Framework\Stdlib\StringUtils $string,
    \Magento\Catalog\Helper\Product $productHelper,
    \Magento\Catalog\Model\ProductTypes\ConfigInterface $productTypeConfig,
    \Magento\Framework\Locale\FormatInterface $localeFormat,
    \Magento\Customer\Model\Session $customerSession,
    ProductRepositoryInterface $productRepository,
    \Magento\Framework\Pricing\PriceCurrencyInterface $priceCurrency,
    CustomProductFactory $_customProduct, 
    array $data = []
) {
    $this->_productHelper = $productHelper;
    $this->urlEncoder = $urlEncoder;
    $this->_jsonEncoder = $jsonEncoder;
    $this->productTypeConfig = $productTypeConfig;
    $this->string = $string;
    $this->_localeFormat = $localeFormat;
    $this->customerSession = $customerSession;
    $this->productRepository = $productRepository;
    $this->priceCurrency = $priceCurrency;
    $this->customProduct    = $_customProduct;
    parent::__construct(
        $context,
        $data
    );
}

    protected function _toHtml()
    {           
        $this->setModuleName($this->extractModuleName('Magento\Catalog\Block\Product\View'));

        $this->getLayout()->getBlock('custom.product')->setTemplate('Myaddon_CustomProduct::custom.phtml');

        return parent::_toHtml();
    }

    public function getCustomProduct(){

        $a = $this->customProduct->create()->getCollection();
        echo count($a); die('xxx');

    }
}

Hope this helps !!