Rails model validation on create and update only

Question

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

validates_presence_of :password, :on => :create

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

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

Do I have to define the validation two times?

Could be a patch in the making... except how is :create and :update different from the default :save? (Wouldn't :save be both?) — Jon Smock
– Jon Smock, Commented Sep 8, 2009 at 12:44

bjnord · Accepted Answer · 2012-02-10 13:07:28Z

66

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

validates_presence_of :password

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

edited Feb 10, 2012 at 13:07

bjnord

2,7442 gold badges23 silver badges25 bronze badges

answered Sep 8, 2009 at 12:26

Alessandra Pereyra

2,64018 silver badges22 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Sébastien Grosjean - ZenCocoon Over a year ago

the new convention is actually to use: validates :password, presence: true

Jason Plank · Accepted Answer · 2011-11-09 18:02:54Z

12

Only write:

validates_presence_of :password

No need...

on => :create

edited Nov 9, 2011 at 18:02

Jason Plank

2,3325 gold badges32 silver badges40 bronze badges

answered Oct 15, 2009 at 17:53

FJ.

1292 bronze badges

Comments

Ederson Badeca · Accepted Answer · 2017-06-01 21:22:41Z

0

You can use this when you need to disable the validation on some specific operations, such as delete.

answered Jun 1, 2017 at 21:22

Ederson Badeca

3972 silver badges10 bronze badges

Collectives™ on Stack Overflow

Rails model validation on create and update only

3 Answers 3

1 Comment

Comments

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

1 Comment

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related