Magento IMP 7

Config FPC Placeholder Definition

This should go in cache.xml. See Boilerplate FPC No-Cache Container for a boilerplate container.

<config>
    <placeholders>
        <namespace_module>
            <block>namespace_module/something</block>
            <placeholder>NAMESPACE_MODULE_UNIQUE_STRING</placeholder>
            <container>Namespace_Module_Model_Pagecache_Container</container>
            <cache_lifetime>86400</cache_lifetime> <!-- never gets used -->
        </namespace_module>
    </placeholders>
</config>

Boilerplate FPC No-Cache Container

This container, when combined with a Placeholder Definition will cause the referenced block to never be cached.

/**
 * Yourcompany.com
 *
 * PHP Version 5
 *
 * @category  Namespace
 * @package   Namespace_Module
 * @author    Your Name <your.name@yourcompany.com>
 * @copyright 2012 yourcompany.com
 * @license   http://www.yourcompany.com/license.txt Your license
 * @link      N/A
 */

/**
 * Cache container
 *
 * @category Namespace
 * @package  Namespace_Module
 * @author   Your Name <your.name@yourcompany.com>
 * @license  http://www.yourcompany.com/license.txt Your license
 * @link     N/A
 */
class Namespace_Module_Model_Pagecache_Container
    extends Enterprise_PageCache_Model_Container_Abstract
{
    /**
     * Get container individual cache id
     *
     * Override to return false to cause the block to never get cached
     *
     * @return string
     */
    protected function _getCacheId()
    {
        return false;
    }

    /**
     * Render block content
     *
     * @return string
     */
    protected function _renderBlock()
    {
        $block = $this->_placeholder->getAttribute('block');
        $block = new $block;

        // only needed if the block uses a template
        $block->setTemplate($this->_placeholder->getAttribute('template'));

        return $block->toHtml();
    }

    /**
     * Generate placeholder content before application was initialized and
     * apply to page content if possible
     *
     * Override to enforce calling {@see _renderBlock()}
     *
     * @param string &$content The content
     *
     * @return bool
     */
    public function applyWithoutApp(&$content)
    {
        return false;
    }
}

Using Differing Setup Classes In One Module

On occasion you may have a module which requires both EAV and flat resource setup classes, in this situation you can instantiate a setup class as this note shows.

Eav:

$installer = Mage::getModel('eav/entity_setup', 'eav_setup');

Flat:

$installer = Mage::getResourceModel('core/setup', 'core_setup');

You can then continue with the setup script as you normally would.

Converting A Quote Attribute To An Order

<config>
    <global>
        <fieldsets>
            <sales_convert_quote>
                <some_attribute>
                    <to_order>*</to_order>
                </some_attribute>
            </sales_convert_quote>
        </fieldsets>
    </global>
</config>

Boilerplate Admin Controller

/**
 * Yourcompany.com
 *
 * PHP Version 5
 *
 * @category  Namespace
 * @package   Namespace_Module
 * @author    Your Name <your.name@yourcompany.com>
 * @copyright 2012 yourcompany.com
 * @license   http://www.yourcompany.com/license.txt Your license
 * @link      N/A
 */

/**
 * A description of the controller
 *
 * @category Namespace
 * @package  Namespace_Module
 * @author   Your Name <your.name@yourcompany.com>
 * @license  http://www.yourcompany.com/license.txt Your license
 * @link     N/A
 */
class Namespace_Module_Adminhtml_SomeController extends Mage_Adminhtml_Controller_Action
{
    /**
     * Control access to this controller via ACL
     *
     * @return bool
     */
    protected function _isAllowed()
    {
        return Mage::getSingleton('admin/session')->isAllowed('the/acl/xpath');
    }

    /**
     * Index action
     *
     * @return void
     */
    public function indexAction()
    {
        $this->_title($this->__('Module'))->_title($this->__('Something'));

        $this->loadLayout();
        $this->_setActiveMenu('namespace_module/something');
        $this->_addBreadcrumb(Mage::helper('namespace_module')->__('Module'), Mage::helper('namespace_module')->__('Something'));
        $this->renderLayout();
    }
}

Enabling The Profiler

In index.php uncomment this line:

#Varien_Profiler::enable();

In the admin enable the profiler output:

Set System > Configuration> Advanced > Developer >Debug > Profiler to yes

To enable the Zend_Db profiler add the following node to your app/etc/local.xml file. It can be added into your database connection configuration. The output will also be displayed if the admin setting above is set to true.

<global>
    <resources>
        <default_setup>
            <connection>
                <profiler>true</profiler>
            </connection>
        </default_setup>
    </resources>
</global>

Enabling MySQL Query Logging

In /lib/Varien/Db/Adapter/Pdo/Mysql.php change this property to true:

/**
 * Write SQL debug data to file
 *
 * @var bool
 */
protected $_debug               = false;

To enable logging for queries slower than a certain time, alter this property:

/**
 * Minimum query duration time to be logged
 *
 * @var float
 */
protected $_logQueryTime        = 0.05;

To log all queries, set this property to true:

/**
 * Log all queries (ignored minimum query duration time)
 *
 * @var bool
 */
protected $_logAllQueries       = false;

Optionally, you can log the call stack, to do so change this property to true:

/**
 * Add to log call stack data (backtrace)
 *
 * @var bool
 */
protected $_logCallStack        = false;

To change to location of the log file, alter this property:

/**
 * Path to SQL debug data log
 *
 * @var string
 */
protected $_debugFile           = 'var/debug/pdo_mysql.log';