undefined method `get_best_compatible' for nil:NilClass

[Kao Saelee]

Hi,

I'm using ActionMailier 3.2.12 and Mail 2.4.4 on ruby 1.9.3p484 (we're supporting a legacy app)

I'm getting the exception "undefined method `get_best_compatible' for nil:NilClass" when the deliver method is called.

I tried googling the exception, but only found this this and it was never answered:
http://stackoverflow.com/questions/13844051/undefined-method-get-best-compatible-for-nilclass-appearing-randomly

Has anyone experience bug and found a fix for it?


//this is our mailer (omitted actual emails):

class Notifications < ActionMailer::Base
  default :from => "te...@test.com"

  def email_sanity_check(sent_at = Time.now)
    @body_text = "sending you a test email at #{sent_at}"
    mail(to: 'kao....@test.com',
         body: @body_text,
         content_type: "text/html",
         subject: "email testing")
  end

end

//code used in controller:
Notifications.email_sanity_check.deliver




exception:

undefined method `get_best_compatible' for nil:NilClass

backtrace:

         /opt/rh/ruby193/root/usr/local/share/gems/gems/mail-2.4.4/lib/mail/body.rb:143:in `get_best_encoding'
        /opt/rh/ruby193/root/usr/local/share/gems/gems/mail-2.4.4/lib/mail/body.rb:156:in `encoded'
        /opt/rh/ruby193/root/usr/local/share/gems/gems/mail-2.4.4/lib/mail/message.rb:1710:in `encoded'
        /opt/rh/ruby193/root/usr/local/share/gems/gems/actionmailer-3.2.12/lib/action_mailer/base.rb:434:in `set_payload_for_mail'
        /opt/rh/ruby193/root/usr/local/share/gems/gems/actionmailer-3.2.12/lib/action_mailer/base.rb:414:in `block in deliver_mail'
        /opt/rh/ruby193/root/usr/local/share/gems/gems/activesupport-3.2.12/lib/active_support/notifications.rb:123:in `block in instrument'
        /opt/rh/ruby193/root/usr/local/share/gems/gems/activesupport-3.2.12/lib/active_support/notifications/instrumenter.rb:20:in `instrument'
        /opt/rh/ruby193/root/usr/local/share/gems/gems/activesupport-3.2.12/lib/active_support/notifications.rb:123:in `instrument'
        /opt/rh/ruby193/root/usr/local/share/gems/gems/actionmailer-3.2.12/lib/action_mailer/base.rb:413:in `deliver_mail'
        /opt/rh/ruby193/root/usr/local/share/gems/gems/mail-2.4.4/lib/mail/message.rb:229:in `deliver'
        /var/www/subs-app/app/controllers/emails_controller.rb:67:in `email_test'
        .
        .
        .

Thanks,
Kao