Rails Mailer: change file when delivery_method :file - ruby-on-rails

Question

I want to have the file named Timestamp + normal_mail_name + ".eml"..
I looked into the rails source code, the mail-gem source code and the letter opener-gem.. Could you give me a hint how to (monkey-patch) the rails mailer to support that i can specify something like:
config.action_mailer.file_settings = { :location => Rails.root.join('tmp', 'mail'), :file_name => Time.now.to_i.to_s + "mail.eml" }
Thank you!
UPDATE:
It would be also nice to have this mails automatically opened with my local associated email programm with launchy, like the letter opener gem.. i would do it myself, but i dont understand the sourcecodes..

Answer 1

I think you have a lot of mailer stuff and you´ll want to debug the mail body, texts, etc.? Am I right?
If I am right, I would not send the mails with delivery_method :file, I just would create a real email (for example gmail) account and send the mails over a test account.
For example in your config/environments/development.rb:
email_settings = YAML::load(File.open("#{Rails.root.to_s}/config/mail.yml"))[Rails.env] rescue nil
if email_settings.nil?
config.action_mailer.raise_delivery_errors = false
config.action_mailer.perform_deliveries = false
config.action_mailer.delivery_method = :file
else
config.action_mailer.raise_delivery_errors = true
config.action_mailer.perform_deliveries = true
config.action_mailer.delivery_method = :smtp
config.action_mailer.smtp_settings = {
:address => "#{email_settings["address"]}",
:port => email_settings["port"],
:authentication => "#{email_settings["authentication"]}",
:user_name => "#{email_settings["user_name"]}",
:password => "#{email_settings["password"]}",
:enable_starttls_auto => email_settings["enable_starttls_auto"]
}
end
And your mail.yml file:
development:
address: smtp.gmail.com
port: 587
authentication: login
user_name: test#your-domain.com
password: yourpassword
enable_starttls_auto: true
This is not really a direct answer for your question, but maybe this work around is a good choice for you. You could also configure your other environments the same way, dependent on your needs.

Answer 2

If you just want skip the transmission of the emails through a real mail server to view your emails locally, two good solutions I've used are:
https://github.com/ryanb/letter_opener
https://github.com/37signals/mail_view
A non-free, OSX-specific solution is to use http://mocksmtpapp.com/
If you want to have a copy of the raw email (headers and all), one way I would do it would be write an email interceptor and write the contents of the mail object to disk.
http://railscasts.com/episodes/206-action-mailer-in-rails-3
Something like this for lib/development_mail_interceptor:
class DevelopmentMailInterceptor
def self.delivering_email(message)
message.perform_deliveries = false
File.open("#{Time.now.to_i}-email.eml", "w") { |f| f.write(message.to_s) }
end
end
and in config/initializers/setup_mail.rb
Mail.register_interceptor(DevelopmentMailInterceptor) if Rails.env.development?