Devise not working with Rails 4.0

问题

I took the following steps:

rails new routing_test

• in Gemfile I added devise

• rails devise g user invoke active_record

  create    db/migrate/20130731191051_devise_create_users.rb
  create    app/models/user.rb
  invoke    rspec
  create      spec/models/user_spec.rb
  invoke      factory_girl
  create        spec/factories/users.rb
  insert    app/models/user.rb
  route  devise_for :users
  

and then, with a simple rake db:migrate, I get the following:

rake aborted!

Rails::Application::RoutesReloader#execute_if_updated delegated to updater.execute_if_updated, but updater is nil: #<Rails::Application::RoutesReloader:0x007feb823b6120 @paths=["/Users/krg07/Developer/core2/test/dummy/config/routes.rb", "/Users/krg07/Developer/core2/config/routes.rb"], @route_sets=[#<ActionDispatch::Routing::RouteSet:0x007feb82c5e700>, #<ActionDispatch::Routing::RouteSet:0x007feb82d34440>]>
/Users/krg07/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/application/routes_reloader.rb:10:in `rescue in execute_if_updated'
/Users/krg07/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/application/routes_reloader.rb:6:in `execute_if_updated'
/Users/krg07/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/application/finisher.rb:69:in `block in <module:Finisher>'

Any idea what is going on? Thanks, really appreciate it!

回答1:

I had problems getting Devise to work with Rails 4 and found that most of the issues were because I was including an older version of the gem that was not updated to work with Rails 4. Specifying the latest version of the gem helped:

gem 'devise', '3.0.0'

You may need to re-run the Devise installer after the gem has been updated.

回答2:

You are not the only one to have this problem, see the following issue for more informations.

来源：https://stackoverflow.com/questions/17978479/devise-not-working-with-rails-4-0