仅在创建和更新时验证 Rails 模型 [英] Rails model validation on create and update only

问题描述

如果我只想在创建时进行验证，那么我可以这样做

If I want to have validation only on create, then I can do

validates_presence_of :password, :on => :create

但是我如何说创建和更新?我试过了，但没有用:

But how do I say on create and update? I tried this but it didn't work:

validates_presence_of :password, :on => [ :create, :update ]

我是否必须定义两次验证?

Do I have to define the validation two times?

推荐答案

默认情况下，验证会针对创建和更新运行.所以它应该只是:

By default, the validations run for both create and update. So it should be just:

validates_presence_of :password

:on 键只允许您选择其中之一.

The :on key just allows you to choose one of them.

这篇关于仅在创建和更新时验证 Rails 模型的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！