我在整个页面中使用这个$categories
$categories = Mage::getModel('catalog/category')
->getCollection()
->addAttributeToSelect('*')
->addAttributeToFilter('level',2)
->addIsActiveFilter()
->addAttributeToSort('position');
foreach($categories as $cat) {$children=$cat->getChildrenCategories();}
选项1
//option 1
$children = $category->getChildren();
foreach(explode(',', $children) as $child):
$sub = Mage::getModel('catalog/category')->load($child);
$sub->getName() // this return ok, name show up
$sub->getImageUrl() // this return ok, image show up
选项2有效，但由于某些原因无法获取图像url。
//option 2
$children = $category->getChildrenCategories();
foreach($children as $sub):
$sub->getName() // this return ok, name show up
$sub->getImageUrl() // this return empty, image NOT show up so is other attribute beside name.
有人能解释一下区别吗？以及如何使用opt 2
基本上，当我们使用getChildrenCategories()函数时，只有少数字段从类别字段集合->url_key,name,all_children,is_anchor中检索到。
你可以在类Mage_Catalog_Model_Resource_Category上看到这一点。所以，如果想要从函数中获取图像url，那么只需添加addAttributeToFilter('image')
$collection = $category->getCollection();
$collection->addAttributeToSelect('url_key')
->addAttributeToSelect('name')
->addAttributeToSelect('all_children')
->addAttributeToSelect('is_anchor')
->setOrder('position', Varien_Db_Select::SQL_ASC)
->joinUrlRewrite()
->addAttributeToFilter('is_active', 1)
->addIdFilter($category->getChildren())
->addAttributeToSelect('image');
foreach($category as $eachChildCat){
if ($image = $eachChildCat->getImage()) {
$url = Mage::getBaseUrl('media').'catalog/category/'.$image;
}
}
$eachChildCat->getImage（）不起作用，然后使用$eachChildCat->getResource（）->getImage
不要调用getModel()，而是尝试调用getSingleton()。
如果你想在第二个选项中获得图像url，你必须加载类别：
$subcategory = Mage::getModel('catalog/category')->load($sub->getId());
$imageUrl = $subcategory->getImageUrl();
如果使用magento 2
我尝试了以下操作，这样它就不会影响性能，您需要将类别模型单独称为
在magento 2.2 的根目录中打开
/vendor/magento/module catalog/Model/ResourceModel/Category.php
在线750ish
添加
->addAttributeToSelect(
'image'
)
或替换功能
/**
* Return child categories
*
* @param 'Magento'Catalog'Model'Category $category
* @return 'Magento'Catalog'Model'ResourceModel'Category'Collection
*/
public function getChildrenCategories($category)
{
$collection = $category->getCollection();
/* @var $collection 'Magento'Catalog'Model'ResourceModel'Category'Collection */
$collection->addAttributeToSelect(
'url_key'
)->addAttributeToSelect(
'image'
)->addAttributeToSelect(
'name'
)->addAttributeToSelect(
'all_children'
)->addAttributeToSelect(
'is_anchor'
)->addAttributeToFilter(
'is_active',
1
)->addIdFilter(
$category->getChildren()
)->setOrder(
'position',
'Magento'Framework'DB'Select::SQL_ASC
)->joinUrlRewrite();
return $collection;
}