Can't use image-url in sass in actionmailer views #71
Description
The following is my actionmailer view:
:sass
body
background-url: image-url('rails.png')
Running that gives me this backtrace:
ActionView::Template::Error: You have a nil object when you didn't expect it!
You might have expected an instance of Array.
The error occurred while evaluating nil.[]
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/sass-rails-3.1.5/lib/sass/rails/helpers.rb:40:in `resolver'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/sass-rails-3.1.5/lib/sass/rails/helpers.rb:25:in `image_url'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/sass-3.1.10/lib/sass/script/funcall.rb:88:in `_perform'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/sass-3.1.10/lib/sass/script/node.rb:40:in `perform'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/sass-3.1.10/lib/sass/tree/visitors/perform.rb:214:in `visit_prop'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/sass-3.1.10/lib/sass/tree/visitors/base.rb:37:in `visit'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/sass-3.1.10/lib/sass/tree/visitors/perform.rb:18:in `visit'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/sass-3.1.10/lib/sass/tree/visitors/base.rb:53:in `block in visit_children'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/sass-3.1.10/lib/sass/tree/visitors/base.rb:53:in `map'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/sass-3.1.10/lib/sass/tree/visitors/base.rb:53:in `visit_children'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/sass-3.1.10/lib/sass/tree/visitors/perform.rb:27:in `block in visit_children'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/sass-3.1.10/lib/sass/tree/visitors/perform.rb:39:in `with_environment'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/sass-3.1.10/lib/sass/tree/visitors/perform.rb:26:in `visit_children'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/sass-3.1.10/lib/sass/tree/visitors/base.rb:37:in `block in visit'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/sass-3.1.10/lib/sass/tree/visitors/perform.rb:234:in `visit_rule'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/sass-3.1.10/lib/sass/tree/visitors/base.rb:37:in `visit'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/sass-3.1.10/lib/sass/tree/visitors/perform.rb:18:in `visit'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/sass-3.1.10/lib/sass/tree/visitors/base.rb:53:in `block in visit_children'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/sass-3.1.10/lib/sass/tree/visitors/base.rb:53:in `map'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/sass-3.1.10/lib/sass/tree/visitors/base.rb:53:in `visit_children'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/sass-3.1.10/lib/sass/tree/visitors/perform.rb:27:in `block in visit_children'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/sass-3.1.10/lib/sass/tree/visitors/perform.rb:39:in `with_environment'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/sass-3.1.10/lib/sass/tree/visitors/perform.rb:26:in `visit_children'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/sass-3.1.10/lib/sass/tree/visitors/base.rb:37:in `block in visit'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/sass-3.1.10/lib/sass/tree/visitors/perform.rb:47:in `visit_root'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/sass-3.1.10/lib/sass/tree/visitors/base.rb:37:in `visit'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/sass-3.1.10/lib/sass/tree/visitors/perform.rb:18:in `visit'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/sass-3.1.10/lib/sass/tree/visitors/perform.rb:7:in `visit'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/sass-3.1.10/lib/sass/tree/root_node.rb:20:in `render'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/sass-3.1.10/lib/sass/engine.rb:300:in `_render'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/sass-3.1.10/lib/sass/engine.rb:248:in `block in render'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/sass-3.1.10/lib/sass/util.rb:297:in `silence_sass_warnings'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/sass-3.1.10/lib/sass/engine.rb:248:in `render'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/haml-3.1.3/lib/haml/filters.rb:311:in `render'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/haml-3.1.3/lib/haml/filters.rb:71:in `render_with_options'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/haml-3.1.3/lib/haml/filters.rb:121:in `block in compile'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/haml-3.1.3/lib/haml/filters.rb:99:in `instance_eval'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/haml-3.1.3/lib/haml/filters.rb:99:in `compile'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/haml-3.1.3/lib/haml/filters.rb:80:in `internal_compile'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/haml-3.1.3/lib/haml/compiler.rb:210:in `compile_filter'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/haml-3.1.3/lib/haml/compiler.rb:447:in `compile'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/haml-3.1.3/lib/haml/compiler.rb:446:in `block (2 levels) in compile'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/haml-3.1.3/lib/haml/compiler.rb:446:in `each'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/haml-3.1.3/lib/haml/compiler.rb:446:in `block in compile'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/haml-3.1.3/lib/haml/compiler.rb:48:in `compile_root'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/haml-3.1.3/lib/haml/compiler.rb:447:in `compile'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/haml-3.1.3/lib/haml/engine.rb:124:in `initialize'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/haml-3.1.3/lib/haml/template/plugin.rb:34:in `new'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/haml-3.1.3/lib/haml/template/plugin.rb:34:in `compile'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/haml-3.1.3/lib/haml/template/plugin.rb:39:in `call'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/actionpack-3.1.2/lib/action_view/template.rb:280:in `compile'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/actionpack-3.1.2/lib/action_view/template.rb:217:in `compile!'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/actionpack-3.1.2/lib/action_view/template.rb:170:in `block in render'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/activesupport-3.1.2/lib/active_support/notifications.rb:55:in `instrument'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/actionpack-3.1.2/lib/action_view/template.rb:169:in `render'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/actionpack-3.1.2/lib/action_view/renderer/template_renderer.rb:40:in `block (2 levels) in render_template'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/actionpack-3.1.2/lib/action_view/renderer/abstract_renderer.rb:33:in `block in instrument'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/activesupport-3.1.2/lib/active_support/notifications.rb:53:in `block in instrument'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/activesupport-3.1.2/lib/active_support/notifications/instrumenter.rb:21:in `instrument'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/activesupport-3.1.2/lib/active_support/notifications.rb:53:in `instrument'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/actionpack-3.1.2/lib/action_view/renderer/abstract_renderer.rb:33:in `instrument'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/actionpack-3.1.2/lib/action_view/renderer/template_renderer.rb:39:in `block in render_template'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/actionpack-3.1.2/lib/action_view/renderer/template_renderer.rb:47:in `render_with_layout'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/actionpack-3.1.2/lib/action_view/renderer/template_renderer.rb:38:in `render_template'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/actionpack-3.1.2/lib/action_view/renderer/template_renderer.rb:12:in `block in render'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/actionpack-3.1.2/lib/action_view/renderer/abstract_renderer.rb:17:in `wrap_formats'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/actionpack-3.1.2/lib/action_view/renderer/template_renderer.rb:9:in `render'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/actionpack-3.1.2/lib/action_view/renderer/renderer.rb:36:in `render_template'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/actionpack-3.1.2/lib/action_view/renderer/renderer.rb:17:in `render'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/actionpack-3.1.2/lib/abstract_controller/rendering.rb:120:in `_render_template'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/actionpack-3.1.2/lib/abstract_controller/rendering.rb:114:in `render_to_body'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/actionpack-3.1.2/lib/abstract_controller/rendering.rb:99:in `render'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/actionmailer-3.1.2/lib/action_mailer/old_api.rb:206:in `block in create_parts'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/actionmailer-3.1.2/lib/action_mailer/old_api.rb:204:in `each'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/actionmailer-3.1.2/lib/action_mailer/old_api.rb:204:in `create_parts'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/actionmailer-3.1.2/lib/action_mailer/old_api.rb:67:in `process'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/actionmailer-3.1.2/lib/action_mailer/base.rb:474:in `process'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/actionmailer-3.1.2/lib/action_mailer/base.rb:469:in `initialize'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/actionmailer-3.1.2/lib/action_mailer/base.rb:456:in `new'
/usr/local/rvm/gems/ruby-1.9.2-p290/gems/actionmailer-3.1.2/lib/action_mailer/base.rb:456:in `method_missing'
test/functional/mailer_test.rb:9:in `block in <class:MailerTest>'
I setup a sample rails 3.1.2 application that shows this bug.
- The rails application is at https://github.com/joevandyk/sass-emails
- The actionmailer view is at https://github.com/joevandyk/sass-emails/blob/master/app/views/mailer/urls_in_stylesheets.html.haml
- The test is at https://github.com/joevandyk/sass-emails/blob/master/test/functional/mailer_test.rb
(I was also testing the other ways to include URLs in emails)
Run 'rake' to run the tests.