- # frozen_string_literal: true
-
- # See also: USERNAME_RE in the Account class
-
- class UniqueUsernameValidator < ActiveModel::Validator
- def validate(account)
- return if account.username.nil?
-
- normalized_username = account.username.downcase
-
- scope = Account.where(domain: nil).where('lower(username) = ?', normalized_username)
- scope = scope.where.not(id: account.id) if account.persisted?
-
- account.errors.add(:username, :taken) if scope.exists?
- end
- end
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