provide :sign_out_via option for Devise::Mapping

lib/devise/mapping.rb

@@ -22,7 +22,7 @@ module Devise
   #   # is the modules included in the class
   #
   class Mapping #:nodoc:
-    attr_reader :singular, :plural, :path, :controllers, :path_names, :class_name
+    attr_reader :singular, :plural, :path, :controllers, :path_names, :class_name, :sign_out_via
     alias :name :singular
 
     # Receives an object and find a scope for it. If a scope cannot be found,
@@ -57,6 +57,8 @@ module Devise
       @path_names = Hash.new { |h,k| h[k] = k.to_s }
       @path_names.merge!(:registration => "")
       @path_names.merge!(options[:path_names] || {})
+
+      @sign_out_via = options[:sign_out_via] || :get
     end
 
     # Return modules for the mapping.

test/mapping_test.rb

@@ -21,6 +21,16 @@ class MappingTest < ActiveSupport::TestCase
     assert_equal "admin_area", Devise.mappings[:admin].path
   end
 
+  test 'sign_out_via defaults to :get' do
+    assert_equal :get, Devise.mappings[:user].sign_out_via
+  end
+
+  test 'allows custom sign_out_via to be given' do
+    assert_equal :delete,          Devise.mappings[:sign_out_via_delete].sign_out_via
+    assert_equal :post,            Devise.mappings[:sign_out_via_post].sign_out_via
+    assert_equal [:delete, :post], Devise.mappings[:sign_out_via_delete_or_post].sign_out_via
+  end
+
   test 'allows custom singular to be given' do
     assert_equal "accounts", Devise.mappings[:manager].path
   end

test/rails_app/config/routes.rb

@@ -43,6 +43,12 @@ Rails.application.routes.draw do
       }
   end
 
+  namespace :sign_out_via do
+    devise_for :deletes, :sign_out_via => :delete, :class_name => "User", :controllers => { :sessions => "sessions" }
+    devise_for :posts, :sign_out_via => :post, :class_name => "User", :controllers => { :sessions => "sessions" }
+    devise_for :delete_or_posts, :sign_out_via => [:delete, :post], :class_name => "User", :controllers => { :sessions => "sessions" }
+  end
+
   match "/set", :to => "home#set"
   root :to => "home#index"
 end