Fixes #1489 again, with updated code and numerous tests to confirm

2 files changed, 11 insertions, 1 deletions

diff --git a/actionpack/lib/sprockets/helpers/rails_helper.rb b/actionpack/lib/sprockets/helpers/rails_helper.rb
index 457ab93ae3..c569124c94 100644
--- a/actionpack/lib/sprockets/helpers/rails_helper.rb
+++ b/actionpack/lib/sprockets/helpers/rails_helper.rb
@@ -57,7 +57,7 @@ module Sprockets
 
       def asset_path(source, options = {})
         source = source.logical_path if source.respond_to?(:logical_path)
-        path = asset_paths.compute_public_path(source, 'assets', options.merge(:body => true))
+        path = asset_paths.compute_public_path(source, asset_prefix, options.merge(:body => true))
         options[:body] ? "#{path}?body=1" : path
       end
 
diff --git a/actionpack/test/template/sprockets_helper_test.rb b/actionpack/test/template/sprockets_helper_test.rb
index c0fb07a29b..a44a16750f 100644
--- a/actionpack/test/template/sprockets_helper_test.rb
+++ b/actionpack/test/template/sprockets_helper_test.rb
@@ -47,6 +47,16 @@ class SprocketsHelperTest < ActionView::TestCase
       asset_path("logo.png", :digest => false)
   end
 
+  test "custom_asset_path" do
+    @config.assets.prefix = '/s'
+    assert_match %r{/s/logo-[0-9a-f]+.png},
+      asset_path("logo.png")
+    assert_match %r{/s/logo-[0-9a-f]+.png},
+      asset_path("logo.png", :digest => true)
+    assert_match %r{/s/logo.png},
+      asset_path("logo.png", :digest => false)
+  end
+
   test "asset_path with root relative assets" do
     assert_equal "/images/logo",
       asset_path("/images/logo")