如果失败，Mongoid Revert

Question

我在mongoid中有一个验证，如果在保存错误消息时失败，我想恢复它。

实施例

if @thing.update_attributes(params[:thing])
  format.html { redirect_to @thing, notice: 'Thing was successfully updated.' }
  format.json { head :no_content }
else
  #revert the fields that have changed and keep @thing.errors
  format.html { render action: "edit" }
  format.json { render json: @thing.errors, status: :unprocessable_entity }   
end

当我保存文件并重新插入时，它似乎不想分配@thing.errors = errors

由于

Answer 1

您可以使用Active Model Dirty模块，请参阅此处http://api.rubyonrails.org/classes/ActiveModel/Dirty.html