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-rw-r--r--actionmailer/lib/action_mailer/base.rb28
1 files changed, 28 insertions, 0 deletions
diff --git a/actionmailer/lib/action_mailer/base.rb b/actionmailer/lib/action_mailer/base.rb
index 1800ff5839..64f82f24a2 100644
--- a/actionmailer/lib/action_mailer/base.rb
+++ b/actionmailer/lib/action_mailer/base.rb
@@ -267,6 +267,33 @@ module ActionMailer #:nodoc:
# set something in the defaults using a proc, and then set the same thing inside of your
# mailer method, it will get over written by the mailer method.
#
+ # = Callbacks
+ #
+ # You can specify callbacks using before_filter and after_filter for configuring your messages.
+ # This may be useful, for example, when you want to add default inline attachments for all
+ # messages sent out by a certain mailer class:
+ #
+ # class Notifier < ActionMailer::Base
+ # before_filter :add_inline_attachment!
+ #
+ # def welcome
+ # mail
+ # end
+ #
+ # private
+ #
+ # def add_inline_attachment!
+ # attachments.inline["footer.jpg"] = File.read('/path/to/filename.jpg')
+ # end
+ # end
+ #
+ # Callbacks in ActionMailer are implemented using AbstractController::Callbacks, so you
+ # can define and configure callbacks in the same manner that you would use callbacks in
+ # classes that inherit from ActionController::Base.
+ #
+ # Note that unless you have a specific reason to do so, you should prefer using before_filter
+ # rather than after_filter in your ActionMailer classes so that headers are parsed properly.
+ #
# = Configuration options
#
# These options are specified on the class level, like
@@ -330,6 +357,7 @@ module ActionMailer #:nodoc:
include AbstractController::Helpers
include AbstractController::Translation
include AbstractController::AssetPaths
+ include AbstractController::Callbacks
self.protected_instance_variables = [:@_action_has_layout]