Route generation between engines broken

[spohlenz]

It seem that this commit (5b3bb61) breaks the generation of routes between engines.

Given two engines (say Admin::Engine mounted at /admin and Blog::Engine mounted at /blog), any references to Blog's routes from within Admin causes /admin to be prepended to the generated URL.

• From the Rails application, blog.root_path produces /blog (correct).
• From within the Blog engine, blog.root_path or root_path produces /blog (correct).
• From within the Admin engine, blog.root_path produces /admin/blog (incorrect).

This issue is not present in Rails 3.2.

[spohlenz]

/cc @drogus

[drogus]

@spohlenz thanks for the report, it seems that we haven't tested this case at all. Could you try with 4-0-stable branch?

[spohlenz]

Thanks @drogus. That appears to fix things for me.