How to use a category collection?

dmitrii_fediuk · March 9, 2016, 10:27am

An example:

magento/magento2/blob/487f5f45/app/code/Magento/Catalog/Block/Adminhtml/Category/Tree.php#L119-L137


/* @var $collection Collection */
$collection = $this->_categoryFactory->create()->getCollection();


$matchingNamesCollection = clone $collection;
$escapedNamePart = $this->_resourceHelper->addLikeEscape(
    $namePart,
    ['position' => 'any']
);
$matchingNamesCollection->addAttributeToFilter(
    'name',
    ['like' => $escapedNamePart]
)->addAttributeToFilter(
    'entity_id',
    ['neq' => \Magento\Catalog\Model\Category::TREE_ROOT_ID]
)->addAttributeToSelect(
    'path'
)->setStoreId(
    $storeId
);

github.com

magento/magento2/blob/487f5f45/app/code/Magento/Catalog/Block/Adminhtml/Category/Tree.php#L146-L153


$collection->addAttributeToFilter(
    'entity_id',
    ['in' => array_keys($shownCategoriesIds)]
)->addAttributeToSelect(
    ['name', 'is_active', 'parent_id']
)->setStoreId(
    $storeId
);

github.com

magento/magento2/blob/487f5f45/app/code/Magento/Catalog/Block/Adminhtml/Category/Tree.php#L161-L170


foreach ($collection as $category) {
    foreach ([$category->getId(), $category->getParentId()] as $categoryId) {
        if (!isset($categoryById[$categoryId])) {
            $categoryById[$categoryId] = ['id' => $categoryId, 'children' => []];
        }
    }
    $categoryById[$category->getId()]['is_active'] = $category->getIsActive();
    $categoryById[$category->getId()]['label'] = $category->getName();
    $categoryById[$category->getParentId()]['children'][] = & $categoryById[$category->getId()];
}

dmitrii_fediuk · March 9, 2016, 10:31am