undefined method 'mailgun_settings=' for ActionMailer::Base:Class

[clorbus]

I'm consistently getting this error on server startup in an otherwise empty rails project with the following configuration:

ruby 2.3.4
rails 5.2.1
mailgun-ruby 1.1.6

development.rb

config.action_mailer.delivery_method = :mailgun
config.action_mailer.mailgun_settings = {
  api_key: "api key here",
  domain: "mailgun domain here"
}

error message

~/.rvm/gems/ruby-2.3.4/gems/actionmailer-5.1.1/lib/action_mailer/base.rb:580:in `method_missing': undefined method `mailgun_settings=' for ActionMailer::Base:Class (NoMethodError)
Did you mean?  sendmail_settings

I'm using config.action_mailer.mailgun_settings= as described in the gem's documentation. Not sure if this is a bug or a configuration issue.

[fadynaffa3]

Same with rails 4.2.8 and the minimum rails version needed is not mentioned in the documentation

[zorro2b]

Seems you need this Gem also:
https://github.com/jorgemanrubia/mailgun_rails

[fadynaffa3]

@zorro2b This is a separate gem and it's not maintained by Mailgun themselves, but I have ended up using it alone without mailgun_ruby gem

[bramski]

Resolutions? Any?

[frankvielma]

I had a similar problem because I had the following line in the Gemfile

gem 'mailgun-ruby', '~> 1.1.9', require: 'mailgun'

I removed the "require" and all is ok now

gem 'mailgun-ruby', '~> 1.1.9'

Using Rails 3.2.17 with Ruby ruby-2.1.6

[yoonwaiyan]

same error here, using Rails 4.2.5 with Ruby 2.3.1 . Removing require doesn't work for me.

[Benjamin-Dobell]

This is Rails bug, same underlying cause as #105. Fixed by pending PR rails/rails#35419

[Benjamin-Dobell]

Should probably note there is an issue with this Gem as well, as it's causing ActionMailer::Base to autoload earlier than it ought to. Fixed in PR #162.

[Retttro]

Version 1.2.4 with the fix is published to rubygems. Closing.
https://github.com/mailgun/mailgun-ruby/releases/tag/v1.2.4