Merge branch 'master' into gray

@@ -25,6 +25,13 @@ const addTicket = co(function * (uid, sku, count, yohoCoin) {
     let ticketInfo = yield api.add(uid, sku, count, yohoCoin);
     let result = {};
 
+    if (_.isEmpty(ticketInfo)) {
+        return {
+            last_order_amount: 0,
+            error: '人太多啦，稍后再试！'
+        };
+    }
+
     if (ticketInfo.code !== 200) {
         return {
             last_order_amount: 0,
@@ -43,6 +50,13 @@ const addTicket = co(function * (uid, sku, count, yohoCoin) {
 const submitTicket = co(function * (uid, sku, count, mobile, yohoCoin) {
     let result = yield api.submit(uid, sku, count, mobile, yohoCoin);
 
+    if (_.isEmpty(result)) {
+        return {
+            code: 500,
+            message: '人太多啦，稍后再试！'
+        };
+    }
+
     if (result.code !== 200) {
         return {
             code: result.code,