fix bug

@@ -61,7 +61,7 @@ exports.saveComment = (req, res, next) => {
 
     // get post args
     let data = {
-        uid: req.user.uid,
+        uid: req.user.uid.toString(),
         productSkn: req.body.productSkn,
         productId: req.body.productId,
         content: req.body.content,

@@ -66,7 +66,19 @@ function doPassportCallback(req, res, user) {
                         refer: refer
                     });
                 } else if (result.data['is_bind'] === 'Y' && result.data.uid) {//eslint-disable-line
-                    return loginService.syncUserSession(result.data.uid, req, res, result.data.session_key).then(() => {
+
+                    let uid = {
+                        toString() {
+                            return this.uid;
+                        },
+                        uid: result.data.uid,
+                        sessionKey: result.data.session_key,
+                        isValid() {
+                            return this.uid && this.sessionKey;
+                        }
+                    };
+                    
+                    return loginService.syncUserSession(uid, req, res, result.data.session_key).then(() => {
                         return refer;
                     });
                 }