Merge pull request #5547 from consuldemocracy/empty_cache_when_upgrading

Clear Rails cache when upgrading Consul Democracy

lib/tasks/cache.rake

@@ -0,0 +1,7 @@
+namespace :cache do
+  desc "Clears the Rails cache"
+  task clear: :environment do
+    ApplicationLogger.new.info "Clearing Rails cache"
+    Rails.cache.clear
+  end
+end

lib/tasks/consul.rake

@@ -2,6 +2,7 @@ namespace :consul do
   desc "Runs tasks needed to upgrade to the latest version"
   task execute_release_tasks: ["settings:rename_setting_keys",
                                "settings:add_new_settings",
+                               "cache:clear",
                                "execute_release_2.2.0_tasks"]
 
   desc "Runs tasks needed to upgrade from 2.1.1 to 2.2.0"

spec/lib/tasks/cache_spec.rb

@@ -0,0 +1,15 @@
+require "rails_helper"
+
+describe "rake cache:clear" do
+  before { Rake::Task["cache:clear"].reenable }
+
+  it "clears the cache", :with_cache do
+    Rails.cache.write("tests/cache_exists", true)
+
+    expect(Rails.cache.fetch("tests/cache_exists") { false }).to be true
+
+    Rake.application.invoke_task("cache:clear")
+
+    expect(Rails.cache.fetch("tests/cache_exists") { false }).to be false
+  end
+end