/**
* @param Mana_Db_Model_Formula_Context $context
* @param Mana_Db_Model_Formula_Node_Field $formula
* @param Mana_Db_Model_Formula_Expr $expr
*/
public function selectField($context, $formula, $expr)
{
foreach ($context->getSelect()->getPart(Varien_Db_Select::COLUMNS) as $column) {
if ($column[2] == $expr->getFieldName()) {
$expr->setExpr($column[1]);
return;
}
}
throw new Mana_Db_Exception_Formula($this->__("Field '%s' referenced in field '%s' is not defined.", $expr->getFieldName(), $context->getField()->getName()));
}
/**
* @param Mana_Db_Model_Formula_Context $context
* @param string $defaultExpr
* @return string
*/
protected function _getOverriddenValueExpr($context, $defaultExpr)
{
if (($no = $context->getField()->getNo()) !== null) {
$overriddenExpr = "`p`.`{$context->getField()->getName()}`";
if ($overriddenExpr != $defaultExpr) {
/* @var $db Mana_Db_Helper_Data */
$db = Mage::helper('mana_db');
$condition = "`p`.`default_mask{$db->getMaskIndex($no)}` & {$db->getMask($no)} = {$db->getMask($no)}";
return "IF ({$condition}, {$overriddenExpr}, {$defaultExpr})";
} else {
return $overriddenExpr;
}
} else {
return $defaultExpr;
}
}
