Allow resetting of the locale pattern on the locale routing filter.

An order-dependent error in locale integration tests
(https://travis-ci.org/mysociety/alaveteli/jobs/37914013) showed that
the routing filter pattern was not being updated from it's initial value
when a new set of available locales was passed to AlaveteliLocalization.

2 files changed, 9 insertions, 0 deletions

diff --git a/lib/alaveteli_localization.rb b/lib/alaveteli_localization.rb
index 6daab124a..2b6978c92 100644
--- a/lib/alaveteli_localization.rb
+++ b/lib/alaveteli_localization.rb
@@ -7,6 +7,7 @@ class AlaveteliLocalization
             I18n.locale = default_locale
             I18n.available_locales = available_locales.map { |locale_name| locale_name.to_sym }
             I18n.default_locale = default_locale
+            RoutingFilter::Conditionallyprependlocale.locales = available_locales
         end
 
         def set_default_text_domain(name, path)
diff --git a/lib/routing_filters.rb b/lib/routing_filters.rb
index a9a62b8db..5b5da6870 100644
--- a/lib/routing_filters.rb
+++ b/lib/routing_filters.rb
@@ -22,5 +22,13 @@ module RoutingFilter
               prepend_segment!(result, locale) if prepend_locale?(locale)
           end
       end
+
+      # Reset the locale pattern when the locales are set.
+      class << self
+          def locales=(locales)
+            @@locales_pattern = nil
+            @@locales = locales.map(&:to_sym)
+          end
+      end
   end
 end