rack-rewrite with Rails 3.2.3 on Heroku

Question

I'm trying to set up rack-rewrite for a Rails 3.2.3 on Heroku cedar stack and everywhere I look it says to add something like:

config.middleware.insert_before(Rack::Lock, Rack::Rewrite) do
  # rewrite rules
end

But trying to run this on Heroku gives me the error:

`assert_index': No such middleware to insert before: Rack::Lock (RuntimeError)

and indeed running "heroku rake middleware" doesn't show Rack::Lock on the list while in development Rack::Lock is there.

First question is why Rack::Lock is not present on Heroku, is that correct? Second question, if not before Rack::Lock, where should I insert Rack::Rewrite?

Thanks!

Do you have threadsafe! enabled in your production environment config? — Jesse Wolgamott, Jul 20 '12 at 02:51
Yep, I do. Is that why Rack::Lock is not there in production? — Oded, Jul 20 '12 at 17:44

Jesse Wolgamott · Accepted Answer · 2012-07-21T01:28:19.750

6

If you use threadsafe! enabled in production, there is no Rack::Lock... so instead:

config.middleware.insert_before(Rack::Runtime, Rack::Rewrite) do
  #your coolness here
end

edited Jul 21 '12 at 01:28

answered Jul 20 '12 at 19:13

Jesse Wolgamott

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Do you mean? `config.middleware.insert_before(Rack::Runtime, Rack::Rewrite) do` I'll check it out. – Oded Jul 20 '12 at 22:31

rack-rewrite with Rails 3.2.3 on Heroku

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