Magento Cache - Product Images

Question

I have a helper from which to add a product through the id. After the product is added, I save some product data (name, price, and image) into an array and return it. But I'm getting the image directly from the product, but I need to get that same image from the magento cache in my specific case.

Helper Code:

public function addCustom($product_id)
{
    // Get customer session
    $session = Mage::getSingleton('customer/session'); 
    // Get cart instance
    $cart = Mage::getSingleton('checkout/cart'); 
    $cart->init();
    // Add a product with custom options
    $product = Mage::getModel('catalog/product')->load($product_id);

    $param = array(
        'product' => $product->getId(),
        'qty' => 1
    );
    $request = new Varien_Object();
    $request->setData($param);
    $cart->addProduct($product, $param);            
    // update session
    $session->setCartWasUpdated(true);
    // save the cart
    $cart->save();      

    $nome = $product->getName();
    $preco = number_format((float)$product->getPrice(), 2, ',', '');
    $media = Mage::getModel('catalog/product_media_config')->getMediaUrl($product->getThumbnail());
    $img = $media;

    $dados['name'] = $nome;
    $dados['price'] = $preco;
    $dados['media'] = $media;
    $dados['imagem'] = $img;

    return $dados;
}

From the code $media = Mage::getModel('catalog/product_media_config')->getMediaUrl($product->getThumbnail()); the magento returns the image in my phtml file as follows by the URL:

/media/catalog/product/u/m/uma-flor-alaranjada-com-mensagem-cart_o-14896928_1_2.jpg

But in my case, I need to bring the same image from the cache for resizing issues, through this URL:

/media/catalog/product/cache/1/thumbnail/50x50/9df78eab33525d08d6e5fb8d27136e95/u/m/uma-flor-alaranjada-com-mensagem-cart_o-14896928_1_2.jpg

Answer 1

To use images from Magento's cache, you need to apply the logic as seen in most theme templates. Drawing from the base rwd/default theme, you can observe how it works:

File: app/design/frontend/rwd/default/template/catalog/product/list.phtml

...
<li class="item<?php if(($i-1)%$_columnCount==0): ?> first<?php elseif($i%$_columnCount==0): ?> last<?php endif; ?>">
    <a href="<?php echo $_product->getProductUrl() ?>" title="<?php echo $this->stripTags($this->getImageLabel($_product, 'small_image'), null, true) ?>" class="product-image">
        <?php $_imgSize = 210; ?>
        <img id="product-collection-image-<?php echo $_product->getId(); ?>"
             src="<?php echo $this->helper('catalog/image')->init($_product, 'small_image')->resize($_imgSize); ?>"
             alt="<?php echo $this->stripTags($this->getImageLabel($_product, 'small_image'), null, true) ?>" />
    </a>
...

---

Mage::helper('catalog/image')

• The main utility for processing product images.
• Uses the init method to generate product image thumbnails.

Example of Use

1    $product = Mage::getModel('catalog/product')->load(1);
2    $image   = Mage::helper('catalog/image')
3        ->init($product, 'small_image')
4        ->resize(50);
5    $imgUrl  = (string) $image;

• Line 2 constructs and returns an instance of Mage_Catalog_Helper_Image
• Line 3 creates and attaches an instance of Mage_Catalog_Model_Product_Image
  • The product default small_image is assigned
  • Cache folder directories are assembled
• Line 4 schedules a resize operation on the image for 50 pixels proportionally
• Line 5 calls the helper class's internal __toString method
  • This in turn applies scheduled transformations on the image model
  • This is turn uses the underlying image adapter to write the image to cache