support rails 3 secret_token

Author: nijikon

lib/rails/secrets/railtie.rb

@@ -29,7 +29,11 @@ class Railtie < ::Rails::Railtie
         if app.secrets.secret_key_base.blank?
           raise "Missing `secret_key_base` for '#{Rails.env}' environment, set this value in `config/secrets.yml`"
         else
-          app.config.secret_key_base = app.secrets.secret_key_base
+          if Rails::VERSION::MAJOR < 4
+            app.config.secret_token = app.secrets.secret_key_base
+          else
+            app.config.secret_key_base = app.secrets.secret_key_base
+          end
         end
       end
     end

test/rails_secrets_test.rb

@@ -13,7 +13,7 @@ class RailsSecretsTest < ActiveSupport::TestCase
   end
 
   test "config.secret_key_base is copied from secrets.secret_key_base" do
-    assert_equal app.secrets.secret_key_base, app.config.secret_key_base
+    assert_equal app.secrets.secret_key_base, secret_key_base
   end
 
   private
@@ -22,4 +22,11 @@ def app
     Rails.application
   end
 
-end
+  def secret_key_base
+    if Rails::VERSION::MAJOR < 4
+      app.config.secret_token
+    else
+      app.config.secret_key_base
+    end
+  end
+end