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How to write custom sql or query in magento

admin — Sat, 12 Feb 2011 11:05:02 +0000

Table names and table prefixes

$tableName = Mage::getSingleton('core/resource')

->getTableName('catalog_product_entity');

// if prefix was 'mage_' then the below statement

// would print out mage_catalog_product_entity

echo $tableName;

———————————

Accessing the database connection resource

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

$write = Mage::getSingleton('core/resource')->getConnection('core_write');

——————————————————–

For a list of functions available, copy the following code into a Magento template.

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

echo '

';

print_r(get_class_methods($read));

echo '';

exit;

————————————————————-

Reading data from the database

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

$query = 'SELECT * FROM ' . Mage::getSingleton('core/resource')->getTableName('catalog_product_entity');

$results = $read->fetchAll($query);

print_r($results);

——————————————————————

Writing information to the database

$write = Mage::getSingleton('core/resource')->getConnection('core_write');

// Add your own query below

// I didn't add one as I didn't want you to run the code

// and me break your database!

$query = 'add your query here';

$write->query($query);

http://fishpig.co.uk/direct-sql-queries-magento/

Looking for function setJoinCategories(true)

admin — Sat, 12 Feb 2011 10:56:37 +0000

If you are looking for setJoinCategories(true) then no need to search because it is not written anywhere. Just go below of page and look for following function
protected function _preparePage()
{
if(!$this->getJoinCategories()) {
return parent::_preparePage();
}

$this->getCollection()->getSelect()->reset(Zend_Db_Select::GROUP);

parent::_preparePage();

$collection = $this->getCollection();
$collection
->joinField(‘category_id’,
‘catalog/category_product’,
‘category_id’,
‘product_id=entity_id’,
null,
‘left’);
$category_name_attribute_id = Mage::getModel(‘eav/entity_attribute’)->loadByCode(‘catalog_category’, ‘name’)->getId();

//@nelkaake -m 13/11/10: Added support for tables with prefixes
$ccev_t = Mage::getConfig()->getTablePrefix(). ‘catalog_category_entity_varchar’;
$collection
->joinField(‘categories’,
$ccev_t,
‘GROUP_CONCAT(_table_categories.value)’,
‘entity_id=category_id’,
“_table_categories.attribute_id={$category_name_attribute_id}”,
‘left’);
$collection
->joinField(‘category’,
$ccev_t,
‘value’,
‘entity_id=category_id’,
“_table_category.attribute_id={$category_name_attribute_id}”,
‘left’);
$collection->groupByAttribute(‘entity_id’);

}

You can find everything here.

How to get table prefixes in magento

admin — Sat, 12 Feb 2011 10:53:15 +0000

Mage::getConfig()->getTablePrefix() you can use this value to get table prefixes

For example Mage::getConfig()->getTablePrefix(). ‘catalog_category_entity_varchar’;

also you can use below code to write custom query

$write = Mage::getSingleton(‘core/resource’)->getConnection(‘core_write’);

ITLive Web Services

admin — Sun, 16 Jan 2011 23:31:33 +0000

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