Reading/writing cookies via a middleware in Rails 4.0

Rails
1

In my Rails 3.2 setup I had the following middleware:

module Rack
class Locale
def initialize(app)
@app = app
end

def call(env)
  request = Rack::Request.new(env)
  params = request.params
  cookies = request.env['action_dispatch.cookies']
  session = request.env['rack.session']


  requested_locale = params['locale'] || cookies['locale'] || I18n.

default_locale

  session['locale'] = cookies['locale'] = locale


  @app.call(env)
end

end
end

It was working fine until I’ve upgraded to Rails 4.0, where cookies is
nil and therefore I get the error:
NoMethodError: undefined method `[]’ for nil:NilClass

when cookies['locale'] is called. What’s the proper way to do this in
Rails 4.0?

P.S. Rack also was bumped from 1.4.6 to 1.5.5.

2

Check out Rails Internationalization (i18n) API:
Rails Internationalization (I18n) API — Ruby on Rails Guides. Section 2.3: It reads:

“You may be tempted to store the chosen locale in a session or a
cookie.
However, do not do this. The locale should be transparent and a part of
the
URL…”

3

On Monday, August 17, 2015 at 1:51:38 PM UTC+1, powi wrote:

It was working fine until I’ve upgraded to Rails 4.0, where cookies is nil and
therefore I get the error:

NoMethodError: undefined method `[]’ for nil:NilClass

when cookies['locale'] is called. What’s the proper way to do this in Rails
4.0?

P.S. Rack also was bumped from 1.4.6 to 1.5.5.

The cookies middleware in rails doesn’t look like it has changed.
However env[“actiondispatch.cookies”] is only set lazily - perhaps
previously there was some other middleware that was causing it to be set
for you? If so then you need to set env[“actiondispatch.cookies”] if it
is nil

If you create an actiondispatch::request rather than rack::request then
you’ll get a cookies method on request that does that for you.

Fred