Missing Hash Definition in Action Mailer Basics Guide Section 2.1.1

In section 2.1.1 of the Action Mailer Basics Guide, the following code snippet is provided for setting up a basic action mailer:

app/mailers/application_mailer.rb

class ApplicationMailer < ActionMailer::Base

default “from@example.com

layout ‘mailer’

end

app/mailers/user_mailer.rb

class UserMailer < ApplicationMailer

end

Unfortunately this results in a TypeError of “no implicit conversion of String into Hash” because the default configuration method expects to receive a hash and not a string (see http://api.rubyonrails.org/classes/ActionMailer/Base.html#method-c-default). Instead, it appears that the following needs to be use:

app/mailers/application_mailer.rb

class ApplicationMailer < ActionMailer::Base

default from: “from@example.com

layout ‘mailer’

end

app/mailers/user_mailer.rb

class UserMailer < ApplicationMailer

end

This is also consistent with the similar code snippet provided in section 2.1.2.

If I’ve misunderstood something here, just let me know. Thanks.