How can i pass json from controller.
<?php
namespace Swarming\FindProdFast\Controller\Index;
use Magento\Framework\App\Action\Action;
use Magento\Framework\App\Action\Context;
use Magento\Framework\App\ResponseInterface;
class FilterOptions extends \Magento\Framework\App\Action\Action
{
protected $_altAttributeCode = 'depth_feet';
protected $_attributeCode = 'depth';
protected $customerSession;
protected $_productCollectionFactory;
protected $_categoryCollectionFactory;
protected $_resource;
protected $resultJsonFactory;
public function __construct(
\Magento\Customer\Model\Session $customerSession,
\Magento\Framework\App\Request\Http $request,
Context $context,
\Magento\Framework\Controller\Result\JsonFactory $resultJsonFactory,
\Magento\Catalog\Model\ResourceModel\Product\CollectionFactory $productCollectionFactory,
\Magento\Catalog\Model\ResourceModel\Category\CollectionFactory $categoryCollectionFactory,
\Magento\Catalog\Model\CategoryFactory $categoryFactory,
\Magento\Framework\App\ResourceConnection $resource,
\Magento\Eav\Model\Entity\Attribute $entityAttribute,
\Magento\Eav\Model\Config $eavConfig
){
$this->customerSession = $customerSession;
$this->_categoryFactory = $categoryFactory;
$this->categoryCollectionFactory = $categoryCollectionFactory;
$this->_productCollectionFactory = $productCollectionFactory;
$this->request = $request;
$this->_entityAttribute = $entityAttribute;
$this->_resource = $resource;
$this->eavConfig = $eavConfig;
parent::__construct($context);
$this->resultJsonFactory = $resultJsonFactory;
}
public function execute()
{
$this->updateSessionValues();
$productCollection = $this->initProductCollection();
$sql = $productCollection->getSelect()->__toString();
$html = $this->getAttributeHtml($productCollection);
$this->getResponse()->setBody($html);
}
protected function updateSessionValues()
{
//Get the customer session
$customerSession = $this->customerSession;
//Get the name of the select that was selected
$requestedAttribute = $this->request->getPost('name');
//Get the value of the attribute that was selected
$selectedValue = $this->request->getPost('value');
//Hold the "next" value
$nextValue = $this->request->getPost('next');
//I'm keeping track of all the types
$usedSessionKeys = $customerSession->getData('used_session_keys');
if (empty($usedSessionKeys)) {
$usedSessionKeys = array();
}
//Get any values that had to be cleared
$cleared = json_decode($this->request->getPost('cleared'));
if (isset($cleared) && count($cleared)) {
foreach ($cleared as $clear) {
$customerSession->unsetData($clear);
unset($usedSessionKeys[$clear]);
}
$customerSession->setData('used_session_keys', $usedSessionKeys);
}
$usedSessionKeys[$requestedAttribute] = $selectedValue;
$customerSession->setData('used_session_keys', $usedSessionKeys);
$customerSession->setData($requestedAttribute, $selectedValue);
$customerSession->setData('next', $nextValue);
$customerSession->setData('current_attribute', $requestedAttribute);
}
protected function initProductCollection()
{
/** @var Mage_Catalog_Model_Resource_Product_Collection $collection */
$collection = $this->getProductCollection();
$customerSession = $this->customerSession;
$usedSessionKeys = $customerSession->getUsedSessionKeys();
foreach ( $usedSessionKeys as $key => $value) {
if ($key == 'product-category') {
$collection->addCategoriesFilter(['eq' => $value]);
} else {
$attributeCode = $this->isAltAttributeRequired($key) ? $this->getAltAttributeCode() : $key;
$collection = $this->joinAttributeOptions($collection, $attributeCode, $value);
}
}
$next = $customerSession->getData('next');
if (!isset($usedSessionKeys[$next]) && !empty($next)) {
$attributeCode = $this->isAltAttributeRequired($next) ? $this->getAltAttributeCode() : $next;
$collection = $this->joinAttributeOptions($collection, $attributeCode);
}
return $collection;
}
protected function getProductCollection()
{
$collection = $this->_productCollectionFactory->create();
$collection->addAttributeToSelect('*');
return $collection;
}
/**
* @param Mage_Catalog_Model_Resource_Product_Collection $collection
* @return string
*/
protected function getAttributeHtml($collection)
{
$next = $this->customerSession->getData('next');
$response = array();
$dataHelper = \Magento\Framework\App\ObjectManager::getInstance()->get("\Swarming\Utilities\Helper\Data");
if (!empty($next)) {
$attributeCode = $this->isAltAttributeRequired($next) ? $this->getAltAttributeCode() : $next;
$attribute = $this->eavConfig->getAttribute('catalog_product', $attributeCode);
$values = $this->getAttributeValues($collection, $attributeCode);
$html = '<option disabled="disabled" selected="selected">Select ' . $attribute->getFrontendLabel() . '</option>';
$selected = count($values) == 1 ? 'selected="selected"' : '';
$count = count($values);
foreach ($values as $value) {
$option = '<option value="' . $value['option_id'] . '"' . $selected . '>' . $dataHelper->convertFraction($value['value']) .'</option>';
$html .= $option;
}
$response['html'] = $html;
$response['count'] = $count;
}else{
$response['html'] = "";
}
$result = $this->resultJsonFactory->create();
return $result->setData($response);
}
/**
* @param Mage_Catalog_Model_Resource_Product_Collection $collection
* @param string $attributeCode
* @param $value
* @return Mage_Catalog_Model_Resource_Product_Collection
* @throws Mage_Core_Exception
*/
protected function joinAttributeOptions($collection, $attributeCode, $value = null)
{
/** @var Mage_Core_Model_Resource $resource */
$resource = $this->_resource->getConnection(\Magento\Framework\App\ResourceConnection::DEFAULT_CONNECTION);
//Get some table names to use in joins
$catalogProductInt = $resource->getTableName('catalog_product_entity_int');
$eavAttributeOption = $resource->getTableName('eav_attribute_option');
$eavAttributeOptionValue = $resource->getTableName('eav_attribute_option_value');
$attribute = $this->eavConfig->getAttribute('catalog_product', $attributeCode);
$optionValue = $attributeCode . '_value';
$option = $attributeCode . '_option';
$collection->getSelect()
->join(array($attributeCode => $catalogProductInt), "$attributeCode.row_id = e.entity_id and $attributeCode.attribute_id = " . $attribute->getAttributeId());
$collection->getSelect()
->join(array($optionValue => $eavAttributeOptionValue), "$attributeCode.value = $optionValue.option_id");
$collection->getSelect()
->joinLeft(array($option => $eavAttributeOption), "$optionValue.option_id = $option.option_id");
if ($value) {
$collection->getSelect()->where("$optionValue.option_id = ?", $value);
}
return $collection;
}
/**
* @param Mage_Catalog_Model_Resource_Product_Collection $collection
* @param string $attributeCode
* @return array
*/
protected function getAttributeValues($collection, $attributeCode)
{
$collection->getSelect()->reset(\Zend_Db_Select::COLUMNS);
$collection->getSelect()->columns(array(sprintf('%s_value.value', $attributeCode), sprintf('%s_value.option_id', $attributeCode)));
$collection->getSelect()->group(sprintf('%s_value.value', $attributeCode));
$collection->getSelect()->order(sprintf('%s_option.sort_order', $attributeCode));
$finalSql = $collection->getSelect()->__toString();
$readConnection = $this->_resource->getConnection(\Magento\Framework\App\ResourceConnection::DEFAULT_CONNECTION);
$attributeValues = $readConnection->fetchAll($collection->getSelect());
return $attributeValues;
}
protected function isAltAttributeRequired($attributeCode = null)
{
$customerSession = $this->customerSession;
$usedSessionKeys = $customerSession->getUsedSessionKeys();
if ($usedSessionKeys && array_key_exists('product-category', $usedSessionKeys)) {
$category = $usedSessionKeys['product-category'];
} else {
return false;
}
$parentData = $this->_categoryFactory->create()->getCollection()->addAttributeToSelect('*')->addAttributeToFilter('name','Thermal Ribbons');
$parentData = $parentData->getData();
$problemCategoryParent = $this->_categoryFactory->create()->load($parentData[0]['entity_id']);
$problemCategories = explode(',', $problemCategoryParent->getChildren());
array_unshift($problemCategories, $problemCategoryParent->getId());
if ($attributeCode) {
return array_search($category, $problemCategories) !== false && $attributeCode == $this->getAttributeCode() ? true : false;
} else {
return array_search($category, $problemCategories) !== false ? true : false;
}
}
protected function getAltAttributeCode()
{
return $this->_altAttributeCode;
}
protected function getAttributeCode()
{
return $this->_attributeCode;
}
}
When i am trying above code i got error :
a:4:{i:0;s:238:"Recoverable Error: Object of class Magento\Framework\Controller\Result\Json\Interceptor could not be converted to string in
Best Answer
So now prepare your JSON content and return it
EDIT