donphan/app/validators/unique_username_validator.rb

15 lines
418 B
Ruby

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