diff options
Diffstat (limited to 'actionmailer/lib/action_mailer/message_delivery.rb')
-rw-r--r-- | actionmailer/lib/action_mailer/message_delivery.rb | 61 |
1 files changed, 44 insertions, 17 deletions
diff --git a/actionmailer/lib/action_mailer/message_delivery.rb b/actionmailer/lib/action_mailer/message_delivery.rb index 5fcb5a0c88..c5ba5f9f1d 100644 --- a/actionmailer/lib/action_mailer/message_delivery.rb +++ b/actionmailer/lib/action_mailer/message_delivery.rb @@ -1,7 +1,6 @@ require 'delegate' module ActionMailer - # The <tt>ActionMailer::MessageDelivery</tt> class is used by # <tt>ActionMailer::Base</tt> when creating a new mailer. # <tt>MessageDelivery</tt> is a wrapper (+Delegator+ subclass) around a lazy @@ -14,29 +13,35 @@ module ActionMailer # Notifier.welcome(User.first).deliver_later # enqueue email delivery as a job through Active Job # Notifier.welcome(User.first).message # a Mail::Message object class MessageDelivery < Delegator - def initialize(mailer, mail_method, *args) #:nodoc: - @mailer = mailer - @mail_method = mail_method - @args = args + def initialize(mailer_class, action, *args) #:nodoc: + @mailer_class, @action, @args = mailer_class, action, args + + # The mail is only processed if we try to call any methods on it. + # Typical usage will leave it unloaded and call deliver_later. + @processed_mailer = nil + @mail_message = nil end + # Method calls are delegated to the Mail::Message that's ready to deliver. def __getobj__ #:nodoc: - @obj ||= begin - mailer = @mailer.new - mailer.process @mail_method, *@args - mailer.message - end + @mail_message ||= processed_mailer.message end - def __setobj__(obj) #:nodoc: - @obj = obj + # Unused except for delegator internals (dup, marshaling). + def __setobj__(mail_message) #:nodoc: + @mail_message = mail_message end - # Returns the Mail::Message object + # Returns the resulting Mail::Message def message __getobj__ end + # Was the delegate loaded, causing the mailer action to be processed? + def processed? + @processed_mailer || @mail_message + end + # Enqueues the email to be delivered through Active Job. When the # job runs it will send the email using +deliver_now!+. That means # that the message will be sent bypassing checking +perform_deliveries+ @@ -77,7 +82,9 @@ module ActionMailer # Notifier.welcome(User.first).deliver_now! # def deliver_now! - message.deliver! + processed_mailer.handle_exceptions do + message.deliver! + end end # Delivers an email: @@ -85,14 +92,34 @@ module ActionMailer # Notifier.welcome(User.first).deliver_now # def deliver_now - message.deliver + processed_mailer.handle_exceptions do + message.deliver + end end private + # Returns the processed Mailer instance. We keep this instance + # on hand so we can delegate exception handling to it. + def processed_mailer + @processed_mailer ||= @mailer_class.new.tap do |mailer| + mailer.process @action, *@args + end + end def enqueue_delivery(delivery_method, options={}) - args = @mailer.name, @mail_method.to_s, delivery_method.to_s, *@args - ActionMailer::DeliveryJob.set(options).perform_later(*args) + if processed? + ::Kernel.raise "You've accessed the message before asking to " \ + "deliver it later, so you may have made local changes that would " \ + "be silently lost if we enqueued a job to deliver it. Why? Only " \ + "the mailer method *arguments* are passed with the delivery job! " \ + "Do not access the message in any way if you mean to deliver it " \ + "later. Workarounds: 1. don't touch the message before calling " \ + "#deliver_later, 2. only touch the message *within your mailer " \ + "method*, or 3. use a custom Active Job instead of #deliver_later." + else + args = @mailer_class.name, @action.to_s, delivery_method.to_s, *@args + ::ActionMailer::DeliveryJob.set(options).perform_later(*args) + end end end end |