# Allows unique IP address (10.0.1.20), and IP addresses with a mask (10.0.0.0/8). # Useful when storing in a Postgresql inet column. class IpAddressFormatValidator < ActiveModel::EachValidator def validate_each(record, attribute, value) if rails4? # In Rails 4.0.0, ip_address will be nil if an invalid IP address was assigned. # https://github.com/jetthoughts/rails/commit/0aa95a71b04f2893921c58a7c1d9fca60dbdcbc2 # BUT: in Rails 4.0.1, validators don't get a chance to # run before IPAddr::InvalidAddressError is raised. # I don't see what broke it in rails 4.0.1... # So this validator doesn't actually do anything anymore. # But let's keep it in case a future version of rails fixes the problem and allows # validators to work on inet and cidr columns. if record.ip_address.nil? record.errors.add(attribute, :invalid) end else unless !record.ip_address.nil? and record.ip_address.to_s.split('/').first =~ Resolv::AddressRegex record.errors.add(attribute, :invalid) end end end end