Может кому поможет....не уверен что правильно но работает))
public function getWishlist($data = array()) {
$sql = "SELECT * FROM " . DB_PREFIX . "customer_wishlist cw LEFT JOIN " . DB_PREFIX . "product_description pd ON (pd.product_id=cw.product_id) LEFT JOIN " . DB_PREFIX . "product p ON (cw.product_id = p.product_id) WHERE cw.customer_id = '" . (int)$this->customer->getId() . "' AND pd.language_id= '" . (int)$this->config->get('config_language_id') . "'";
$sort_data = array(
'pd.name',
'p.model',
'p.quantity',
'p.price',
'p.sort_order',
'p.date_added'
);
if (isset($data['sort']) && in_array($data['sort'], $sort_data)) {
if ($data['sort'] == 'pd.name' || $data['sort'] == 'p.model') {
$sql .= " ORDER BY LCASE(" . $data['sort'] . ")";
} elseif ($data['sort'] == 'p.price') {
$sql .= " ORDER BY (CASE WHEN special IS NOT NULL THEN special WHEN discount IS NOT NULL THEN discount ELSE p.price END)";
} else {
$sql .= " ORDER BY " . $data['sort'];
}
} else {
$sql .= " ORDER BY p.sort_order";
}
if (isset($data['order']) && ($data['order'] == 'DESC')) {
$sql .= " DESC, LCASE(pd.name) DESC";
} else {
$sql .= " ASC, LCASE(pd.name) ASC";
}
if (isset($data['start']) || isset($data['limit'])) {
if ($data['start'] < 0) {
$data['start'] = 0;
}
if ($data['limit'] < 1) {
$data['limit'] = 20;
}
$sql .= " LIMIT " . (int)$data['start'] . "," . (int)$data['limit'];
}
$query = $this->db->query($sql);
return $query->rows;
}