Get product collection from a category id

Question

I am trying to get a collection of products from a category id. A few things I have tried are in the block :

 $category = Mage::getModel('catalog/category')->load(123)
        ->getProductCollection();

and

    $category = Mage::getModel('catalog/category')->load(123);
    $products = $category->getProductCollection()->addCategoryFilter($category)
                         ->addAttributeToFilter('type_id', 'simple')
                         ->addAttributeToSelect('*');

also tried just doing it from the phtml

$oCatId = Mage::getModel('catalog/category')->load(769); 
        $products->addCategoryFilter($oCatId);

None of this works but I am not seeing any errors either. I saw another post that seems like the same question : Magento - Get Products from Specific Category but that method did not work for me either. Thanks for any help!

Answer 1

Try this:

$products = Mage::getModel('catalog/category')->load($category_id)
 ->getProductCollection()
 ->addAttributeToSelect('*') // add all attributes - optional
 ->addAttributeToFilter('status', 1) // enabled
 ->addAttributeToFilter('visibility', 4) //visibility in catalog,search
 ->setOrder('price', 'ASC'); //sets the order by price

_{Source: http://overlycaffeinated.com/blog/2011/02/get-all-sale-products-from-a-category-in-magento/}

This should work because it adds the category filter for you by virtue of already having the category loaded:

Mage_Catalog_Model_Category

public function getProductCollection()
{
    $collection = Mage::getResourceModel('catalog/product_collection')
        ->setStoreId($this->getStoreId())
        ->addCategoryFilter($this);
    return $collection;
}

Wait, it still doesn't work!

Ok, so you may have larger issues, presumably something overwriting getProductCollection. So let's try circumventing that convenience method:

$category = Mage::getModel('catalog/category')->load($category_id);
$products = Mage::getResourceModel('catalog/product_collection')
        ->setStoreId(Mage::app()->getStore()->getId())
        ->addCategoryFilter($category);

Answer 2

How to load a product collection with all data that you usually need for product lists in the frontend:

$_categoryId = 123;
$category = Mage::getModel('catalog/category')->load($_categoryId );
$productCollection = $category->getProductCollection();
$productCollection
        ->addStoreFilter()
        ->setVisibility(Mage::getSingleton('catalog/product_visibility')->getVisibleInCatalogIds())
        ->addMinimalPrice()
        ->addFinalPrice()
        ->addTaxPercents()
        ->addAttributeToSelect(Mage::getSingleton('catalog/config')->getProductAttributes())
        ->addUrlRewrite();

This prepares the product collection to load the necessary data to display prices, the product link and any attributes configured as "used in product listing", but not more.

Answer 3

This below code will give you product collection from category id 10.

$categoryId = 10;    
$products = Mage::getSingleton('catalog/category')->load($categoryId)
            ->getProductCollection()
            ->addAttributeToSelect('*');

Answer 4

The code to get product collection from specific category id:

$categoryId = 12;
$productCollection = Mage::getResourceModel('catalog/product_collection')
                       ->addCategoryFilter($categoryId);

Answer 5

Below piece of code is much simpler and efficient than loading product collection and filtering using it's attributes,

$categoryId = 32; // Replace with your category

$category = Mage::getModel('catalog/category')
                 ->setStoreId(Mage::app()->getStore()->getId())
                 ->load($categoryId);

Mage::register('current_category', $category);

$products = Mage::getSingleton('catalog/layer')->getProductCollection();

echo $products->getSize();

Answer 6

In Magento 2 try this forget category collection using category ID

  $objectManager = \Magento\Framework\App\ObjectManager::getInstance();
  $subCategory =  $objectManager->create('Magento\Catalog\Model\Category')-> 
         load('categorey_id');
  foreach($subCategory as $subcat)
   { 
        print_r($subcat->getData();
  }

Answer 7

<?php

$categoryid = 123; // Category Id

$category = new Mage_Catalog_Model_Category();
$category->load($categoryid);
$collection = $category->getProductCollection();
$collection->addAttributeToSelect('*'); 

foreach ($_productCollection as $_product) { ?>
    <div class="pr_section">
        <div class="pr_desc">
            <a href="<?php echo $_product->getProductUrl(); ?>"><?php echo $_product->getName(); ?></a>
            <?php echo $this->getReviewsSummaryHtml($_product, false, true); // Reviews ?>
                <?php echo $this->getPriceHtml($_product, true) ?>
                <?php echo $_product->getShortDescription();?>

                <?php if(!$_product->canConfigure() && $_product->isSaleable()): ?>
                    <p><button type="button" title="<?php echo Mage::helper('core')->quoteEscape($this->__('Add to Cart')) ?>" class="button btn-cart" onclick="setLocation('<?php echo $this->getAddToCartUrl($_product) ?>')"><span><span><?php echo $this->__('Add to Cart') ?></span></span></button></p>
                <?php elseif($_product->getStockItem() && $_product->getStockItem()->getIsInStock()): ?>
                    <p><a title="<?php echo $this->__('View Details') ?>" class="button btn-cart" href="<?php echo $_product->getProductUrl() ?>"><?php echo $this->__('View Details') ?></a></p>
                <?php else: ?>
                    <p class="availability out-of-stock"><span><?php echo $this->__('Out of stock') ?></span></p>
                <?php endif; ?>
        </div>
        <div class="pr_img">
                <a href="<?php echo $_product->getProductUrl() ?>"><img src="<?php echo $this->helper('catalog/image')->init($_product, 'small_image')->resize(200); ?>" width="200" height="200" alt="" /></a> 
        </div>
<?php } ?>

Get product collection with detail. Hope it will be helpful.