You’re developing a Magento importer and you want to clean your DB after some tests? Here you have:

require_once dirname(__FILE__) . '/app/Mage.php';
Mage::app()->setCurrentStore(Mage::getModel('core/store')->load(Mage_Core_Model_App::ADMIN_STORE_ID));

$resource = Mage::getSingleton('core/resource');
$db_read = $resource->getConnection('core_read');

$attribute_sets = $db_read->fetchCol("SELECT attribute_set_id FROM " . $resource->getTableName("eav_attribute_set") . " WHERE attribute_set_id<> 4 AND entity_type_id=4");
foreach ($attribute_sets as $attribute_set_id) {
	try {
		Mage::getModel("eav/entity_attribute_set")->load($attribute_set_id)->delete();
	} catch (Exception $e) {
		echo $e->getMessage() . "\n";
	}
}

Note that only products’ attribute sets are deleted, those are often generated automatically during imports.

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You’re developing a Magento importer and you want to clean your DB after some tests? Here you have:

require_once dirname(__FILE__) . '/app/Mage.php';
Mage::app()->setCurrentStore(Mage::getModel('core/store')->load(Mage_Core_Model_App::ADMIN_STORE_ID));

$resource = Mage::getSingleton('core/resource');
$db_read = $resource->getConnection('core_read');

$categories = $db_read->fetchCol("SELECT entity_id FROM " . $resource->getTableName("catalog_category_entity") . " WHERE entity_id>1 ORDER BY entity_id DESC");
foreach ($categories as $category_id) {
	try {
		Mage::getModel("catalog/category")->load($category_id)->delete();
	} catch (Exception $e) {
		echo $e->getMessage() . "\n";
	}
}

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I’ve run into a few posts about this thing but none of them was working out of the box so I took all the info and glued them together so…

if you’ve to create a custom attribute for a Magento category but you don’t have a module (and its installer script) simply create a php file in the project’s root with this code:

require_once('app/Mage.php');
Mage::app()->setCurrentStore(Mage::getModel('core/store')->load(Mage_Core_Model_App::ADMIN_STORE_ID));
$installer = new Mage_Sales_Model_Mysql4_Setup;
$attribute  = array(
	'type' => 'int',
	'label'=> 'Your attribute label',
	'input' => 'text',
	'global' => Mage_Catalog_Model_Resource_Eav_Attribute::SCOPE_GLOBAL,
	'visible' => true,
	'required' => false,
	'user_defined' => true,
	'default' => "",
	'group' => "General Information"
);
$installer->addAttribute('catalog_category', 'your_attribute_code', $attribute);
$installer->endSetup();

This attribute is a “text”, more info may come in comments if you need.

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