Method: Mail::Message#method_missing

Defined in:

lib/mail/message.rb

#method_missing(name, *args, &block) ⇒ Object

Method Missing in this implementation allows you to set any of the standard fields directly as you would the “to”, “subject” etc.

Those fields used most often (to, subject et al) are given their own method for ease of documentation and also to avoid the hook call to method missing.

This will only catch the known fields listed in:

Mail::Field::KNOWN_FIELDS

as per RFC 2822, any ruby string or method name could pretty much be a field name, so we don’t want to just catch ANYTHING sent to a message object and interpret it as a header.

This method provides all three types of header call to set, read and explicitly set with the = operator

Examples:

mail.comments = 'These are some comments'
mail.comments #=> 'These are some comments'

mail.comments 'These are other comments'
mail.comments #=> 'These are other comments'

mail.date = 'Tue, 1 Jul 2003 10:52:37 +0200'
mail.date.to_s #=> 'Tue, 1 Jul 2003 10:52:37 +0200'

mail.date 'Tue, 1 Jul 2003 10:52:37 +0200'
mail.date.to_s #=> 'Tue, 1 Jul 2003 10:52:37 +0200'

mail.resent_msg_id = '<1234@resent_msg_id.lindsaar.net>'
mail.resent_msg_id #=> '<1234@resent_msg_id.lindsaar.net>'

mail.resent_msg_id '<4567@resent_msg_id.lindsaar.net>'
mail.resent_msg_id #=> '<4567@resent_msg_id.lindsaar.net>'

# File 'lib/mail/message.rb', line 1377

def method_missing(name, *args, &block)
  #:nodoc:
  # Only take the structured fields, as we could take _anything_ really
  # as it could become an optional field... "but therin lies the dark side"
  field_name = Utilities.underscoreize(name).chomp("=")
  if Mail::Field::KNOWN_FIELDS.include?(field_name)
    if args.empty?
      header[field_name]
    else
      header[field_name] = args.first
    end
  else
    super # otherwise pass it on
  end
  #:startdoc:
end