Allow Mailers to have custom initialize methods that set default instance...

Allow Mailers to have custom initialize methods that set default instance variables for all mail actions (closes #2563) [mrj@bigpond.net.au]

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@2742 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

actionmailer/CHANGELOG

+*SVN*
+
+* Allow Mailers to have custom initialize methods that set default instance variables for all mail actions #2563 [mrj@bigpond.net.au]
+
+
 *1.1.2* (October 26th, 2005)
 
 * Upgraded to Action Pack 1.10.2

actionmailer/lib/action_mailer/base.rb

@@ -337,15 +337,14 @@ def deliver!(mail = @mail)
       # mailer. Subclasses may override this method to provide different
       # defaults.
       def initialize_defaults(method_name)
-        @bcc = @cc = @from = @recipients = @sent_on = @subject = nil
-        @charset = @@default_charset.dup
-        @content_type = @@default_content_type.dup
-        @implicit_parts_order = @@default_implicit_parts_order.dup
-        @template = method_name
-        @mailer_name = Inflector.underscore(self.class.name)
-        @parts = []
-        @headers = {}
-        @body = {}
+        @charset ||= @@default_charset.dup
+        @content_type ||= @@default_content_type.dup
+        @implicit_parts_order ||= @@default_implicit_parts_order.dup
+        @template ||= method_name
+        @mailer_name ||= Inflector.underscore(self.class.name)
+        @parts ||= []
+        @headers ||= {}
+        @body ||= {}
         @mime_version = @@default_mime_version.dup if @@default_mime_version
       end