简写返回promise对象

@@ -19,7 +19,7 @@ const _activity = () => {
 
 const _user = (params) => {
     if (!params.uid) {
-        return {};
+        return Promise.resolve();
     }
     return api.get('', {
         method: 'app.passport.profile',
@@ -388,9 +388,7 @@ const getOrders = (params) => {
     let finalResult = [];
 
     if (!params.uid) {
-        return new Promise(function(resolve){
-            resolve();
-        });
+        return Promise.resolve();
     }
     return _getOrderData(params).then(result => {
         if (result.data && result.data.page_total && params.page <= result.data.page_total && result.data.order_list) {