app/controllers/devise/invitations_controller.rb in devise_invitable-1.5.5 vs app/controllers/devise/invitations_controller.rb in devise_invitable-1.6.0

@@ -1,11 +1,20 @@
 class Devise::InvitationsController < DeviseController
+  if Rails::VERSION::MAJOR >= 5
+    prepend_before_action :authenticate_inviter!, :only => [:new, :create]
+    prepend_before_action :has_invitations_left?, :only => [:create]
+    prepend_before_action :require_no_authentication, :only => [:edit, :update, :destroy]
+    prepend_before_action :resource_from_invitation_token, :only => [:edit, :destroy]
+  else
+    prepend_before_filter :authenticate_inviter!, :only => [:new, :create]
+    prepend_before_filter :has_invitations_left?, :only => [:create]
+    prepend_before_filter :require_no_authentication, :only => [:edit, :update, :destroy]
+    prepend_before_filter :resource_from_invitation_token, :only => [:edit, :destroy]
+  end
 
-  prepend_before_filter :authenticate_inviter!, :only => [:new, :create]
-  prepend_before_filter :has_invitations_left?, :only => [:create]
-  prepend_before_filter :require_no_authentication, :only => [:edit, :update, :destroy]
-  prepend_before_filter :resource_from_invitation_token, :only => [:edit, :destroy]
-  helper_method :after_sign_in_path_for
+  if respond_to? :helper_method
+    helper_method :after_sign_in_path_for
+  end
 
   # GET /resource/invitation/new
   def new
     self.resource = resource_class.new
     render :new