class DomainValidator
Validate if a string is a valid domain. This should work with IDN.
validates :domain_column, domain: true
Set a minimum and maximum number of domain parts (aka. labels)
validates :domain_column, domain: { min_domain_parts: 2 } validates :domain_column, domain: { max_domain_parts: 2 }
Constants
- REGEXP
RFC 1034, section 3.1: Each node has a label, which is zero to 63 octets in length.
RFC 1035, secion 2.3.1: <label> ::= <letter> [ [ <ldh-str> ] <let-dig> ]
<let-dig> ::= <letter> | <digit>
<letter> ::= any one of the 52 alphabetic characters A through Z in upper case and a through z in lower case
<digit> ::= any one of the ten digits 0 through 9
- …
-
Labels must be 63 characters or less.
TODO: There are more considerations, especially for IDN. RFC5891 section 4.2 lists some.
Public Instance Methods
validate_each(record, attribute, value)
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# File lib/validators/domain_validator.rb, line 38 def validate_each record, attribute, value parts = value.respond_to?(:split) ? value.split('.') : [] parts.each do |part| record.errors.add attribute, (options[:message] || I18n.t('rails_validations.domain.invalid')) unless part =~ REGEXP end if options[:max_domain_parts].present? && parts.length > options[:max_domain_parts] record.errors.add attribute, (options[:message] || I18n.t('rails_validations.domain.max_domain_parts', max: options[:max_domain_parts])) end if options[:min_domain_parts].present? && options[:min_domain_parts] > parts.length record.errors.add attribute, (options[:message] || I18n.t('rails_validations.domain.min_domain_parts', min: options[:min_domain_parts])) end end