Gsyfuy

I would like to display *Category Tree Names** in multi select field in magento 2 admin end?

I have tried with below code but displaying only first cateogires could you please any one help on this?

$field = $fieldset->addField(

            'wp_test',

            'multiselect',          

            [

                'name' => 'wp_test',

                'label' => __("Test"),

                'values' => $categorylistsource->toOptionArray(),

                'value' => $this->_getTest(),

                'title' => __('Test.'),

                'note' => __('Test')



            ]

        );

HelloConfigurableSkuModelConfigSource

<?php

/**



@copyright Copyright

*/

namespace HelloConfigurableSkuModelConfigSource;



use MagentoFrameworkOptionArrayInterface;



class Categorylist implements ArrayInterface

{

    protected $_categoryFactory;

    protected $_categoryCollectionFactory;



    public function __construct(

        MagentoCatalogModelCategoryFactory $categoryFactory,

        MagentoCatalogModelResourceModelCategoryCollectionFactory $categoryCollectionFactory

    )

    {

        $this->_categoryFactory = $categoryFactory;

        $this->_categoryCollectionFactory = $categoryCollectionFactory;

    }



    public function getCategoryCollection($isActive = true, $level = false, $sortBy = false, $pageSize = false)

    {

        $collection = $this->_categoryCollectionFactory->create();

        $collection->addAttributeToSelect('*');



        // select only active categories

        if ($isActive) {

            $collection->addIsActiveFilter();

        }



        // select categories of certain level

        if ($level) {

            $collection->addLevelFilter($level);

        }



        // sort categories by some value

        if ($sortBy) {

            $collection->addOrderField($sortBy);

        }



        // select certain number of categories

        if ($pageSize) {

            $collection->setPageSize($pageSize);

        }



        return $collection;

    }



    public function toOptionArray()

    {

        $arr = $this->_toArray();

        $ret = [];



        foreach ($arr as $key => $value)

        {

            $ret[] = [

                'value' => $key,

                'label' => $value

            ];

        }



        return $ret;

    }



    private function _toArray()

    {

        $categories = $this->getCategoryCollection(true, false, false, false);



        $catagoryList = array();

        foreach ($categories as $category)

        {

            $catagoryList[$category->getEntityId()] = __($this->_getParentName($category->getPath()) . $category->getName());

        }



        return $catagoryList;

    }



    private function _getParentName($path = '')

    {

        $parentName = '';

        $rootCats = array(1,2);



        $catTree = explode("/", $path);

        // Deleting category itself

        array_pop($catTree);



        if($catTree && (count($catTree) > count($rootCats)))

        {

            foreach ($catTree as $catId)

            {

                if(!in_array($catId, $rootCats))

                {

                    $category = $this->_categoryFactory->create()->load($catId);

                    $categoryName = $category->getName();

                    $parentName .= $categoryName . ' -> ';

                }

            }

        }



        return $parentName;

    }

}

But As per the above logic displaying only single line but i need to display like tree as mentioned below screenshot. how to achieve?

OUT PUT I WANT:-

please follow the below logic to get the category collection as tree structure. please let me know if u need any help.

<?php

namespace HelloConfigurableSkuModelConfigSource;



use MagentoFrameworkOptionArrayInterface;

use MagentoCatalogHelperCategory;



class Categorylist implements ArrayInterface

{

    protected $_categoryHelper;

    protected $categoryRepository;

    protected $categoryList;



    public function __construct(

        MagentoCatalogHelperCategory $catalogCategory,

        MagentoCatalogModelCategoryRepository $categoryRepository

        )

    {

        $this->_categoryHelper = $catalogCategory;

        $this->categoryRepository = $categoryRepository;

    }



    /*

     * Return categories helper

     */



    public function getStoreCategories($sorted = false, $asCollection = false, $toLoad = true)

    {

        return $this->_categoryHelper->getStoreCategories($sorted , $asCollection, $toLoad);

    }



    /*  

     * Option getter

     * @return array

     */

    public function toOptionArray()

    {





        $arr = $this->toArray();

        $ret = [];



        foreach ($arr as $key => $value)

        {



            $ret[] = [

                'value' => $key,

                'label' => $value

            ];

        }



        return $ret;

    }



    /*

     * Get options in "key-value" format

     * @return array

     */

    public function toArray()

    {



        $categories = $this->getStoreCategories(true,false,true);

        $categoryList = $this->renderCategories($categories);

        return $categoryList;

    }



    public function renderCategories($_categories)

    {

        foreach ($_categories as $category){

            $i = 0; 

            $this->categoryList[$category->getEntityId()] = __($category->getName());   // Main categories

            $list = $this->renderSubCat($category,$i);

        }



        return $this->categoryList;     

    }



    public function renderSubCat($cat,$j){



        $categoryObj = $this->categoryRepository->get($cat->getId());



        $level = $categoryObj->getLevel();

        $arrow = str_repeat("---", $level-1);

        $subcategories = $categoryObj->getChildrenCategories(); 



        foreach($subcategories as $subcategory) {

            $this->categoryList[$subcategory->getEntityId()] = __($arrow.$subcategory->getName()); 



            if($subcategory->hasChildren()) {



                $this->renderSubCat($subcategory,$j);



            }

        } 



        return $this->categoryList;

    }

}

?>

Good answer! I applied it in my project.