处理一下空的情况

app/Service/v3/Implementations/ActivityService.php

@@ -74,7 +74,9 @@ class ActivityService implements ActivityServiceInterface
         $redis = ApplicationContext::getContainer()->get(Redis::class);
         $activitySettings = $redis->hGetAll('activity_type_setting');
         $activity['type'] = $type = $activitySettings['index_activity_type'];
-        $activity['settings'] = json_decode($activitySettings[$activitySettings['index_activity_type']], true);
+        $settingsStr = $activitySettings[$activity['type']] ?? '';
+        $activity['settings'] = json_decode($settingsStr, true);
+        $activity['settings'] = !empty($activity['settings']) ? $activity['settings'] : (object)[];
 
         $storeTable = ApplicationContext::getContainer()->get(Store::class)->getTable();
         $goodsTable = ApplicationContext::getContainer()->get(GoodsActivity::class)->getTable();
@@ -107,7 +109,7 @@ class ActivityService implements ActivityServiceInterface
             ->orderBy(''.$goodsTable.'.expire_time', 'ASC')
             ->orderBy(''.$goodsTable.'.created_at', 'DESC');
 
-        if (isset($activity['settings']['index_num_limit'])&&!empty($activity['settings']['index_num_limit'])) {
+        if (is_array($activity['settings'])&&isset($activity['settings']['index_num_limit'])&&!empty($activity['settings']['index_num_limit'])) {
             $builder = $builder->limit($activity['settings']['index_num_limit']);
         }