Add the #unshift method to the middleware stack

The docs suggest that the middleware stack is an Array, so I've added
the unshift method to it. Originally I added some more Array methods,
but it was agreed that they lacked usecases.

1 files changed, 5 insertions, 0 deletions

diff --git a/actionpack/lib/action_dispatch/middleware/stack.rb b/actionpack/lib/action_dispatch/middleware/stack.rb
index 12bc438be3..bbf734f103 100644
--- a/actionpack/lib/action_dispatch/middleware/stack.rb
+++ b/actionpack/lib/action_dispatch/middleware/stack.rb
@@ -75,6 +75,11 @@ module ActionDispatch
       middlewares[i]
     end
 
+    def unshift(*args, &block)
+      middleware = self.class::Middleware.new(*args, &block)
+      middlewares.unshift(middleware)
+    end
+
     def initialize_copy(other)
       self.middlewares = other.middlewares.dup
     end