处理bug

@@ -608,6 +608,8 @@ class PrivateController extends BaseController
     public function getExternalLink(Request $request)
     {
         $max_id = DB::table('gl_project_external_link_make')->where(['status' => 0])->max('id');
+        if (empty($max_id))
+            return $this->success();
         $links = DB::table('gl_project_external_link_make')->where(['status' => 0])->where('id', '<=', $max_id)->pluck('external_link')->toArray();
         DB::table('gl_project_external_link_make')->where(['status' => 0])->where('id', '<=', $max_id)->update(['status' => 1, 'updated_at' => date('Y-m-d H:i;s')]);
         return $this->success($links);