Customize Devise Validations

Keep the sweet Devise format validations, and customize devise validations by rolling your own

First, remove the :validatable argument from the devise method

devise :database_authenticatable, :token_authenticatable

Then, you’ll need to implement your own validations. Depending on your intentions, either include or exclude validates_presence_of :email

$ validates_uniqueness_of :email, :case_sensitive => false, :allow_blank => true, :if => :email_changed?

$ validates_format_of :email, :with => Devise.email_regexp, :allow_blank => true, :if => :email_changed? 

$ validates_presence_of :password, :on=>:create validates_confirmation_of :password, :on=>:create

$ validates_length_of :password, :within => Devise.password_length, :allow_blank => true


I know the above looks vaguely familiar… say: what you used to write all the time before Devise kicked in. But look at the devise validatable source – this is all it’s doing anyway.


Also cool: use the Devise.email_regexp and Devise.password_length to get good email validations.

          This post was valid with Devise 1.4.6 and Rails 2.3/3.0/3.1.