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module Devise
module Models
# Validatable creates all needed validations for a user email and password.
# It's optional, given you may want to create the validations by yourself.
# Automatically validate if the email is present, unique and its format is
# valid. Also tests presence of password, confirmation and length.
#
# == Options
#
# Validatable adds the following options to devise_for:
#
# * +email_regexp+: the regular expression used to validate e-mails;
# * +password_length+: a range expressing password length. Defaults to 8..72.
#
module Validatable
# All validations used by this module.
VALIDATIONS = [:validates_presence_of, :validates_uniqueness_of, :validates_format_of,
:validates_confirmation_of, :validates_length_of].freeze
def self.required_fields(klass)
[]
end
def self.included(base)
base.extend ClassMethods
assert_validations_api!(base)
base.class_eval do
validates_presence_of :email, if: :email_required?
validates_uniqueness_of :email, allow_blank: true, if: :email_changed?
validates_format_of :email, with: email_regexp, allow_blank: true, if: :email_changed?
validates_presence_of :password, if: :password_required?
validates_confirmation_of :password, if: :password_required?
validates_length_of :password, within: password_length, allow_blank: true
end
end
def self.assert_validations_api!(base) #:nodoc:
unavailable_validations = VALIDATIONS.select { |v| !base.respond_to?(v) }
unless unavailable_validations.empty?
raise "Could not use :validatable module since #{base} does not respond " <<
"to the following methods: #{unavailable_validations.to_sentence}."
end
end
protected
# Checks whether a password is needed or not. For validations only.
# Passwords are always required if it's a new record, or if the password
# or confirmation are being set somewhere.
def password_required?
!persisted? || !password.nil? || !password_confirmation.nil?
end
def email_required?
true
end
module ClassMethods
Devise::Models.config(self, :email_regexp, :password_length)
end
end
end
end
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