discourse/lib/validators/username_setting_validator.rb

class UsernameSettingValidator
  def initialize(opts = {})
    @opts = opts
  end

  def valid_value?(val)
    !val.present? || User.where(username: val).exists?
  end

  def error_message
    I18n.t('site_settings.errors.invalid_username')
  end
end
Validate username site settings 2014-06-12 02:42:41 +08:00			`class UsernameSettingValidator`
Add rubocop to our build. (#5004) 2017-07-28 09:20:09 +08:00			`def initialize(opts = {})`
Add a way to validate min and max value of an integer site setting 2014-06-13 06:03:03 +08:00			`@opts = opts`
			`end`

			`def valid_value?(val)`
Validate username site settings 2014-06-12 02:42:41 +08:00			`!val.present? \|\| User.where(username: val).exists?`
			`end`

Add validation of string site settings with regex, and min and max lengths 2014-06-18 22:49:21 +08:00			`def error_message`
Validate username site settings 2014-06-12 02:42:41 +08:00			`I18n.t('site_settings.errors.invalid_username')`
			`end`
			`end`