public function change_quantity()
{
import('Think.ORG.Cart');
// 导入购物车类
$cart = new \Common\ORG\Cart();
$itemId = input('post.itemId', 'intval');
//商品ID
$quantity = input('post.quantity', 'intval');
//购买数量
// $seid = input('post.seid', 'intval');//sessionID
//dump($seid);exit;
$item = M('item')->field('goods_stock')->find($itemId);
if ($item['goods_stock'] < $quantity) {
$data = array('status' => 0, 'msg' => '该商品的库存不足');
} else {
$cart->modNum($itemId, $quantity);
$data = array('status' => 1, 'item' => $cart->getItem($itemId), 'sumPrice' => $cart->getPrice());
}
echo json_encode($data);
}
