Create custom pagination in magento

Hope you known about block, xml in Magento.
Here is an extracted code that would help you to create pagination with custom collection in magento.

    >> First paste the following code in your block class (e.g. product.php)
       
        <?php
        class example extends parentclass
        {
            private $_itemPerPage = 2;
            private $_pageFrame = 8;
            private $_curPage = 1;
           
            public function getCollection($collection = 'null')
            {
                if($collection != 'null'){
                    $page = $this->getRequest()->getParam('p');
                    if($page) $this->_curPage = $page;
                   
                    $collection->setCurPage($this->_curPage);
                    $collection->setPageSize($this->_itemPerPage);
                    return $collection;
                }
            }
           
            public function getPagerHtml($collection = 'null')
            {   
                $html = false;
                if($collection == 'null') return;
                if($collection->count() > $this->_itemPerPage)
                {
                    $curPage = $this->getRequest()->getParam('p');
                    $pager = (int)($collection->count() / $this->_itemPerPage);
                    $count = ($collection->count() % $this->_itemPerPage == 0) ? $pager : $pager + 1 ;
                    $url = $this->getPagerUrl();
                    $start = 1;
                    $end = $this->_pageFrame;
                   
                    $html .= '<ol>';
                    if(isset($curPage) && $curPage != 1){
                        $start = $curPage - 1;                                       
                        $end = $start + $this->_pageFrame;
                    }else{
                        $end = $start + $this->_pageFrame;
                    }
                    if($end > $count){
                        $start = $count - ($this->_pageFrame-1);
                    }else{
                        $count = $end-1;
                    }
                   
                    for($i = $start; $i<=$count; $i++)
                    {
                        if($i >= 1){
                            if($curPage){
                                $html .= ($curPage == $i) ? '<li class="current">'. $i .'</li>' : '<li><a href="'.$url.'&p='.$i.'">'. $i .'</a></li>';
                            }else{
                                $html .= ($i == 1) ? '<li class="current">'. $i .'</li>' : '<li><a href="'.$url.'&p='.$i.'">'. $i .'</a></li>';
                            }
                        }
                       
                    }
                   
                    $html .= '</ol>';
                }
               
                return $html;
            }
           
            public function getPagerUrl()                            // You need to change this function as per your url.
            {
                $cur_url = mage::helper('core/url')->getCurrentUrl();
                $new_url = preg_replace('/\&p=.*/', '', $cur_url);
               
                return $new_url;
            }
       
        }
        ?>
       
    >> Now you have to modify your frontend phtml page. (e.g. custom.phtml)
       
        <?php
            $_collections = $this->getProductCollection();            // Default Collection on which you'll implement pagination.
            $_productCollection = $this->getCollection($_collections);  // calling the function that have been created in block page.
            foreach ($_productCollection as $_product):

           ------------------ Your code here ------------

           endforeach;
        ?>   
        <?php if($this->getPagerHtml($this->getProductCollection())):?>        // pass the default collection as parameter
        <div class="pages">
            <span><?php echo $this->__('Page : ');?></span>
            <?php echo $this->getPagerHtml($this->getProductCollection());?>
        </div>
        <?php endif;?>
       
       
       
       
       
       
       
       

get product quantity/qty in Magento

>> $_product is your product object. = Mage::getModel('catalog/product')->load('product_id');

    <?php
      $stock = Mage::getModel('cataloginventory/stock_item')->loadByProduct($_product);
      $qty = $stock->getQty();
      print_r( $stock->getData());      // To get other stock information.
    ?>

How to redirect in magento

>> Pass the url in this function :

    public function redirect($url)
    {
        return Mage::app()->getFrontController()
                       ->getResponse()
                       ->setRedirect($url);  
    }

Change default sort by order for one category in Magento

>> If you want to change default sort by value "position" to "name", change admin category setting. see the screen-shot.

   

    you can change default direction by providing the following code in Custom Layout Update section in admin category "Custom Design" Tab
    <reference name="product_list_toolbar">
          <action method="setDefaultDirection"><dir>desc</dir></action>
    </reference>

>> Add "created_at" in sort by dropdown.

    update eav_attribute set frontend_label = "Date" where attribute_code = "created_at" AND entity_type_id = 4; // Ensure about the entity_type_id
    update catalog_eav_attribute set used_for_sort_by = 1 where attribute_id = (select attribute_id from eav_attribute where attribute_code = "created_at" AND entity_type_id = 4);
   
    Now You can see the Date in admin default sort by configuration.
    Admin=>System=>Configuration=>Catalog=>Frontend=> change value here "Product Listing Sort by"

>> If you want to add another attribute, go to the attribute setting and set "yes" for use for default sort by, see the screen-shot.

    Admin=>Attributes=>Manage Attributes

add custom product view page for custom product type in magento

>> Suppose you've created a new Product Type "custom". I've posted how to add new product type in magento. You want to use a different template for those product. follow the instruction ::

  You can directly update in the catalog.xml or you can create a custom module by using Module Creator.

<layout>
  <PRODUCT_TYPE_custom>
    <reference name="product.info">
      <action method="setTemplate">
        <template>path/to/your/view.phtml</template>
      </action>
    </reference>
  </PRODUCT_TYPE_custom>
</layout>

How to add custom product type in Magento

>> Basically You can't create a product type from Admin. You need to modify config.xml and sql in your module.

config.xml

<global>
    <catalog>
        <product>
            <type>
                <classified translate="label" module="vendor">
                    <label>Classified</label>
                    <model>vendor/product_type_classified</model>
                    <composite>0</composite>
                    <index_priority>50</index_priority>
                    <is_qty>1</is_qty>
                </classified>
            </type>
        </product>
    </catalog>
</global>

Here classified is my custom product type and vendor is my custom module.

Now you need to update price type attributes for new type : To run your sql file of your module for next time you need to delete the row created for the module "vendor" in core_resource table. We will discuss later for update Sql.
<?php

$installer = $this;
/* @var $installer Mage_Catalog_Model_Resource_Eav_Mysql4_Setup */

$installer->startSetup();

$setup = new Mage_Eav_Model_Entity_Setup('core_setup');

$fieldList = array(
    'price',
    'special_price',
    'special_from_date',
    'special_to_date',
    'minimal_price',
    'cost',
    'tier_price',
    'weight',
    'tax_class_id'
);

// make these attributes applicable to downloadable products
foreach ($fieldList as $field) {
    $applyTo = split(',', $setup->getAttribute('catalog_product', $field, 'apply_to'));
    if (!in_array('classified', $applyTo)) {
        $applyTo[] = 'classified';
        $setup->updateAttribute('catalog_product', $field, 'apply_to', join(',', $applyTo));
    }
}

$installer->endSetup();

?>

How to get attribute set name in Magento

>> $prodAttributeSet = Mage::getModel('eav/entity_attribute_set')->load($_product->getAttributeSetId())->getAttributeSetName();


>> To get the attributeset name in cart page see the following..
app/design/frontend/base/default/template/checkout/cart/item/default.phtml (or in your theme folder.)

Here you can see the cart item object $_item = $this->getItem(); at line 28. Then you have to load the product with product id.
<?php
    $_product = Mage::getModel('catalog/product')->load($_item->getProductId());
    $prodAttributeSet = Mage::getModel('eav/entity_attribute_set')->load($_product->getAttributeSetId())->getAttributeSetName();
?>