CODEWITHSUNDEEP
ruby-on-railsruby-on-rails-3validationruby-on-rails-4
John Smith
John Smith

Reputation: 6269

Validates uniqueness but only when 'Admin' is selected as username

I want to avoid that somebody can create an user with the username 'Admin'. I use this username as Host to control some functions of my application. I know there is a expression to validate the uniqueness of an model record:

validates_uniqueness_of

But i only want that the username 'Admin' cant be created twice. I hope somebody has an idea! Thanks

Upvotes: 0

Views: 58

Answers (2)

Gavin Miller
Gavin Miller

Reputation: 43875

You can use conditionals in your validation to do the following:

class Model
  validates :username, uniqueness: true, if: :admin?

  def admin?
    username.downcase == 'admin'
  end
end

With that said, they'd take away my developer card if I didn't discourage you from doing this.

Basing an admin account solely on whether the username is admin is setting yourself up for your security being compromised. Have a look at something like ActiveAdmin for managing your administrator accounts so that they're at the very least separated from your user accounts.

Upvotes: 2

zrl3dx
zrl3dx

Reputation: 7869

Or just validates_uniqueness_of :username, if: -> {username == 'admin'} in your model.

Upvotes: 1

Related Questions