gx

@@ -94,13 +94,17 @@ class BaseController extends Controller
                     $this->map['name'] = ['like','%'.$v.'%'];
                     break;
                 case "start_at":
+                    if(!empty($v)){
                         $this->_btw[0]                             = $v;
                         $this->_btw[1]                             = date('Y-m-d H:i:s',time());
                         $this->map['created_at'] = ['between', $this->_btw];
+                    }
                     break;
                 case "end_at":
+                    if(!empty($v)){
                         $this->_btw[1]                             = $v;
                         $this->map['updated_at'] = ['between', $this->_btw];
+                    }
                     break;
                 default:
                     if(!empty($v)){