Created
August 24, 2011 20:10
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Rails email validation
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# http://my.rails-royce.org/2010/07/21/email-validation-in-ruby-on-rails-without-regexp/ | |
# lib/email_validator.rb | |
require 'mail' | |
module ActiveModel | |
module Validations | |
class EmailValidator < ActiveModel::EachValidator | |
def validate_each(record,attribute,value) | |
begin | |
m = Mail::Address.new(value) | |
# We must check that value contains a domain and that value is an email address | |
r = m.domain && m.address == value | |
t = m.__send__(:tree) | |
# We need to dig into treetop | |
# A valid domain must have dot_atom_text elements size > 1 | |
# user@localhost is excluded | |
# treetop must respond to domain | |
# We exclude valid email values like <[email protected]> | |
# Hence we use m.__send__(tree).domain | |
r &&= (t.domain.dot_atom_text.elements.size > 1) | |
rescue Exception => e | |
r = false | |
end | |
record.errors[attribute] << (options[:message] || "is invalid") unless r | |
end | |
end | |
end | |
end |
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