Expose MiddlewareStack#unshift to environment configuration.

3 files changed, 14 insertions, 0 deletions

diff --git a/railties/CHANGELOG.md b/railties/CHANGELOG.md
index a4babbe8c3..4e6bf899af 100644
--- a/railties/CHANGELOG.md
+++ b/railties/CHANGELOG.md
@@ -1,3 +1,7 @@
+*   Expose MiddlewareStack#unshift to environment configuration.
+
+    *Ben Pickles*
+
 *   Include `web-console` into newly generated applications' Gemfile.
 
     *Genadi Samokovarov*
diff --git a/railties/lib/rails/configuration.rb b/railties/lib/rails/configuration.rb
index c694513960..f5d7dede66 100644
--- a/railties/lib/rails/configuration.rb
+++ b/railties/lib/rails/configuration.rb
@@ -59,6 +59,10 @@ module Rails
         @operations << [__method__, args, block]
       end
 
+      def unshift(*args, &block)
+        @operations << [__method__, args, block]
+      end
+
       def merge_into(other) #:nodoc:
         @operations.each do |operation, args, block|
           other.send(operation, *args, &block)
diff --git a/railties/test/application/middleware_test.rb b/railties/test/application/middleware_test.rb
index 31a35a09bb..20d1d76d78 100644
--- a/railties/test/application/middleware_test.rb
+++ b/railties/test/application/middleware_test.rb
@@ -144,6 +144,12 @@ module ApplicationTests
       assert_equal "Rack::Config", middleware.second
     end
 
+    test 'unshift middleware' do
+      add_to_config 'config.middleware.unshift Rack::Config'
+      boot!
+      assert_equal 'Rack::Config', middleware.first
+    end
+
     test "Rails.cache does not respond to middleware" do
       add_to_config "config.cache_store = :memory_store"
       boot!