Devise - EmailValidatorをカスタマイズする

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経緯


  • Deviseで認証するアプリで、Userのemail検証をカスタマイズしたい。

  • うまくいったのでメモ。


やり方


おまじないを一行加える。

class User < ActiveRecord::Base

#...
devise :database_authenticatable, :registerable,
:recoverable, :rememberable, :trackable, :validatable,
:confirmable, :omniauthable

TEMP_EMAIL_PREFIX = 'change@me'
TEMP_EMAIL_REGEX = /\Achange@me/

# おまじない
validates :email, :presence => true, :email => true

#...


EmailValidatorに自分で検証を書き加える。


/app/validators/email_validator.rb

require 'mail'

class EmailValidator < ActiveModel::EachValidator
def validate_each(record,attribute,value)
begin
m = Mail::Address.new(value)
# We must check that value contains a domain, the domain has at least
# one '.' and that value is an email address
r = m.domain!=nil && m.domain.match('\.') && m.address == value

# Update 2015-Mar-24
# the :tree method was private and is no longer available.
# 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 <user@localhost.com>
# 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

# Reject temporary email address
record.errors[attribute] << 'must be given. Please give us a real one!!!' unless value !~ User::TEMP_EMAIL_REGEX
end
end



結果(イメージ)

自分で書いた検証項目を簡単に追加することができた。

Screenshot 2015-08-10 22.30.27.png


資料