fix

@@ -196,7 +196,7 @@ module.exports = class extends global.yoho.BaseModel {
             let [product, content, count] = result;
 
             if (product && product.length) {
-                resData = product[0];
+                resData = product[0] || {};
                 resData.content = _.sortBy(content || [], o => {
                     return o.sort;
                 });

@@ -70,9 +70,17 @@ class SqlHelper {
 
             let cacheResult = await this.cache.get(cacheKey);
 
-            if (!_.isUndefined(cacheResult) && !_.isNull(cacheResult)) {
-                this.logger.debug('get success from cache.' + cacheString);
-                return Promise.resolve(cacheResult);
+
+            if (cacheResult) {
+                try {
+                    cacheResult = JSON.parse(cacheResult);
+
+                    this.logger.debug('get success from cache.' + cacheString);
+
+                    return Promise.resolve(cacheResult);
+                } catch (e) {
+                    this.logger.debug('cache data parse fail.' + JSON.stringify(e));
+                }
             }
         }