symfony2中有规律的动态路由

mall_goods_list_by_price_or_sales_or_create_time:
    path:      /goods/list_by_price

defaults:  {_controller:MallBundle:Goods:listByPrice}

mall_goods_list_by_price_or_sales_or_create_time:
    path:      /goods/list_by_sales

defaults:  {_controller:MallBundle:Goods:listBySales
}

mall_goods_list_by_price_or_sales_or_create_time:
    path:      /goods/list_by_create_time
defaults:  {_controller:MallBundle:Goods:listByCreateTime}

mall_goods_list_by_price_or_sales_or_create_time:
    path:      /goods/list_by_{condition}  （这就相当于一个占位符了）
defaults:  {_controller:MallBundle:Goods:listByCondition}
requirements:  {condition: price|sales|create_time} （这么写是为了告诉框架，只有有其中3个值的之一我才有这个路径）

/**
* 按所给条件（价格，销售值，时间）获取商品列表
*/
public function listByConditionAction(request $request, $condition)
{
$warehouseId = trim($request->request->get('categoryId'));
$page = (int) $request->request->get('page');
$order = trim($request->request->get('order'));
if (empty($order)) {
$order = 'DESC';
}

if ($page < 1) {
$page = 1;
}
$pageSize = (int) $request->request->get('$pageSize');
if (!in_array($pageSize, array(8, 16))) {
$pageSize = 8;
}

$sort_field = array(
'price' => 'minPrice',
'create_time' => 'createTime',
'sales' => 'sales',
);

$repository = $this->getDoctrine()->getRepository('AppBundle:Goods');
$goodsList = $repository->findBy(
array(
'warehouseId' => $warehouseId,
'status' => 0,
),
array($sort_field[$condition] => $order ),
$pageSize,
$pageSize * ($page - 1)
);
$ret = $this->_getListByCondition($warehouseId, $goodsList);

return new JsonResponse($ret);
}