Mime Type WILDCARD constant WILDCARD Ruby on Rails edge Since edge Returned when looking up ‘/`, the Accept header of most non-browser clients, instead of building an equal instance on each request. Unlike Mime::ALL, it’s a plain unregistered type. On this page Support Bug Reports can be filed for the Ruby on Rails project on GitHub. Feature requests should be discussed on the rubyonrails-core forum. License Released under the MIT license.