ask the request if we should show exceptions

hide the env key in the request object so that other code doesn't need
to know.

1 files changed, 4 insertions, 3 deletions

diff --git a/actionpack/lib/action_dispatch/middleware/show_exceptions.rb b/actionpack/lib/action_dispatch/middleware/show_exceptions.rb
index a764a1aea5..12d8dab8eb 100644
--- a/actionpack/lib/action_dispatch/middleware/show_exceptions.rb
+++ b/actionpack/lib/action_dispatch/middleware/show_exceptions.rb
@@ -27,12 +27,13 @@ module ActionDispatch
     end
 
     def call(env)
+      request = ActionDispatch::Request.new env
       @app.call(env)
     rescue Exception => exception
-      if env['action_dispatch.show_exceptions'] == false
-        raise exception
-      else
+      if request.show_exceptions?
         render_exception(env, exception)
+      else
+        raise exception
       end
     end