selectionCalculate

db/selection.go

@@ -337,5 +337,11 @@ func UpdateSelectionNum(ctx context.Context, selectionID string) error {
 	if err != nil {
 		return err
 	}
+
+	err = db.Model(gorm_model.YounggeeSelectionInfo{}).Where("selection_id = ?", selectionID).Updates(
+		map[string]interface{}{"after_delivery_num": gorm.Expr("after_delivery_num - ?", 1)}).Error
+	if err != nil {
+		return err
+	}
 	return nil
 }