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mastodon/app/validators/unique_username_validator.rb
Eugen Rochko 2a90da1837
Fix UniqueUsernameValidator comparison (#6926)
Comparison was downcasing only one side, therefore if previously
existing account had a non-lowercase spelling, it would be ignored
when checking for duplicates.

New rake task `mastodon:maintenance:find_duplicate_usernames` will
help find constraint violations that might have occured from the
presence of this bug.

Bump version to 2.3.3
2018-03-27 04:33:57 +02:00

15 lines
437 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).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