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-rw-r--r--app/models/application_mailer.rb14
1 files changed, 14 insertions, 0 deletions
diff --git a/app/models/application_mailer.rb b/app/models/application_mailer.rb
index cdb279c3c..1a97a4bf9 100644
--- a/app/models/application_mailer.rb
+++ b/app/models/application_mailer.rb
@@ -77,6 +77,17 @@ class ApplicationMailer < ActionMailer::Base
# and via template_path, which is created from it) in the create! method when
# looking for templates. Our modified version looks for templates in the view_paths
# in order.
+
+ # It also has a line converting the mail subject to a string. This is because we
+ # use translated strings in the subject lines, sometimes in conjunction with
+ # user input, like request titles. The _() function used for translation
+ # returns an instance of SafeBuffer, which doesn't handle gsub calls in the block form
+ # with $ variables - https://github.com/rails/rails/issues/1555.
+ # Unfortunately ActionMailer uses that form in quoted_printable(), which will be
+ # called if any part of the subject requires quoting. So we convert the subject
+ # back to a string via to_str() before passing in to create_mail. There is a test
+ # for this in spec/models/request_mailer_spec.rb
+
# Changed lines marked with ***
# Initialize the mailer via the given +method_name+. The body will be
@@ -139,6 +150,9 @@ class ApplicationMailer < ActionMailer::Base
# already set.
@mime_version ||= "1.0" if !@parts.empty?
+ # *** Convert into a string
+ @subject = @subject.to_str if @subject
+
# build the mail object itself
@mail = create_mail
end