修改addtime的校验

app/Filters/OrderIssueFilters.php

@@ -248,7 +248,7 @@ class OrderIssueFilters
     public function log_content($log_content)
     {
         $order_issue_process_log_query = OrderIssueProcessLog::query()->selectRaw('order_issue_id')->where('content', 'like', $log_content);
-        if (!$this->params['addtime']) {
+        if (!array_key_exists('addtime',$this->params) ) {
             $order_issue_process_log_query->where('created_at', '>=', Carbon::now()->subDays(31));
         } else {
             $order_issue_process_log_query->where('created_at', '>=', Carbon::now()->subDays($this->params['addtime']));