Rails model validation on create and update only

ruby-on-rails validation model
Jakub Arnold picture Jakub Arnold · Sep 8, 2009 · Viewed 48.7k times · Source

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?

Answer

Alessandra Pereyra picture Alessandra Pereyra · Sep 8, 2009

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.

Related questions

Rails: Validating min and max length of a string but allowing it to be blank

I have a field that I would like to validate. I want the field to be able to be left blank, but if a user is entering data I want it to be in a certain format. Currently I am …

Read More
Ruby on Rails: errors.add_to_base vs. errors.add

I have read that errors.add_to_base should be used for errors associated with the object and not a specific attribute. I am having trouble conceptualizing what this means. Could someone provide an example of when I would want …

Read More
Rails "validates_uniqueness_of" Case Sensitivity

Here is the model (I am using SQLLite3): class School < ActiveRecord::Base validates_uniqueness_of :name end For example, after I add "Yale", I cannot add "Yale" but can add "yale." How can I make the validation case insensitive? …

Read More