仅在创建和更新时进行Rails模型验证 [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，那么我可以做

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

validates_presence_of :password, :on => :create

但是我怎么说创建和更新?我试过了，但是没用:

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

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

我必须定义两次验证吗?

Do I have to define the validation two times?

推荐答案

默认情况下，验证会同时针对创建和更新运行.所以应该是:

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

validates_presence_of :password

:on键仅允许您选择其中之一.

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

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