Devise: undefined local variable or method `resource_class' for #<UsersController:0x007fdf001ee0d8>

[lguenier]

Hello,
I followed to the letter the method described here https://github.com/plataformatec/devise#strong-parameters but I still have an error raised...
undefined local variable or method `resource_class' for #UsersController:0x007fdf001ee0d8

I'm using devise: gem 'devise', github: 'plataformatec/devise' and rails 4.2.1.

Any idea as how to do to correct this issue?

Thanks

[josevalim]

Can you provide the the full stacktrace? It is very hard to provide any information based only on the error message.

[lguenier]

This is the full trace:

undefined local variable or method `resource_class' for #UsersController:0x00000003c55668

Extracted source (around line #10):

def configure_permitted_parameters
devise_parameter_sanitizer.for(:account_update) { |u| u.permit(:email, :current_password, :password, :password_confirmation, :name, :surname, :sex) }
end

end

Rails.root: /home/johndoe/intra_ruby

Application Trace | Framework Trace | Full Trace
/home/johndoe/.bundler/ruby/devise-a29fee164449/lib/devise/controllers/helpers.rb:152:in devise_parameter_sanitizer' app/controllers/application_controller.rb:10:inconfigure_permitted_parameters'
app/controllers/users_controller.rb:19:in update' actionpack (4.2.1) lib/action_controller/metal/implicit_render.rb:4:insend_action'
actionpack (4.2.1) lib/abstract_controller/base.rb:198:in process_action' actionpack (4.2.1) lib/action_controller/metal/rendering.rb:10:inprocess_action'
actionpack (4.2.1) lib/abstract_controller/callbacks.rb:20:in block in process_action' activesupport (4.2.1) lib/active_support/callbacks.rb:117:incall'
activesupport (4.2.1) lib/active_support/callbacks.rb:117:in call' activesupport (4.2.1) lib/active_support/callbacks.rb:555:inblock (2 levels) in compile'
activesupport (4.2.1) lib/active_support/callbacks.rb:505:in call' activesupport (4.2.1) lib/active_support/callbacks.rb:505:incall'
activesupport (4.2.1) lib/active_support/callbacks.rb:92:in _run_callbacks' activesupport (4.2.1) lib/active_support/callbacks.rb:776:in_run_process_action_callbacks'
activesupport (4.2.1) lib/active_support/callbacks.rb:81:in run_callbacks' actionpack (4.2.1) lib/abstract_controller/callbacks.rb:19:inprocess_action'
actionpack (4.2.1) lib/action_controller/metal/rescue.rb:29:in process_action' actionpack (4.2.1) lib/action_controller/metal/instrumentation.rb:32:inblock in process_action'
activesupport (4.2.1) lib/active_support/notifications.rb:164:in block in instrument' activesupport (4.2.1) lib/active_support/notifications/instrumenter.rb:20:ininstrument'
activesupport (4.2.1) lib/active_support/notifications.rb:164:in instrument' actionpack (4.2.1) lib/action_controller/metal/instrumentation.rb:30:inprocess_action'
actionpack (4.2.1) lib/action_controller/metal/params_wrapper.rb:250:in process_action' activerecord (4.2.1) lib/active_record/railties/controller_runtime.rb:18:inprocess_action'
actionpack (4.2.1) lib/abstract_controller/base.rb:137:in process' actionview (4.2.1) lib/action_view/rendering.rb:30:inprocess'
actionpack (4.2.1) lib/action_controller/metal.rb:196:in dispatch' actionpack (4.2.1) lib/action_controller/metal/rack_delegation.rb:13:indispatch'
actionpack (4.2.1) lib/action_controller/metal.rb:237:in block in action' actionpack (4.2.1) lib/action_dispatch/routing/route_set.rb:74:incall'
actionpack (4.2.1) lib/action_dispatch/routing/route_set.rb:74:in dispatch' actionpack (4.2.1) lib/action_dispatch/routing/route_set.rb:43:inserve'
actionpack (4.2.1) lib/action_dispatch/journey/router.rb:43:in block in serve' actionpack (4.2.1) lib/action_dispatch/journey/router.rb:30:ineach'
actionpack (4.2.1) lib/action_dispatch/journey/router.rb:30:in serve' actionpack (4.2.1) lib/action_dispatch/routing/route_set.rb:819:incall'
warden (1.2.3) lib/warden/manager.rb:35:in block in call' warden (1.2.3) lib/warden/manager.rb:34:incatch'
warden (1.2.3) lib/warden/manager.rb:34:in call' rack (1.6.0) lib/rack/etag.rb:24:incall'
rack (1.6.0) lib/rack/conditionalget.rb:38:in call' rack (1.6.0) lib/rack/head.rb:13:incall'
actionpack (4.2.1) lib/action_dispatch/middleware/params_parser.rb:27:in call' actionpack (4.2.1) lib/action_dispatch/middleware/flash.rb:260:incall'
rack (1.6.0) lib/rack/session/abstract/id.rb:225:in context' rack (1.6.0) lib/rack/session/abstract/id.rb:220:incall'
actionpack (4.2.1) lib/action_dispatch/middleware/cookies.rb:560:in call' activerecord (4.2.1) lib/active_record/query_cache.rb:36:incall'
activerecord (4.2.1) lib/active_record/connection_adapters/abstract/connection_pool.rb:649:in call' activerecord (4.2.1) lib/active_record/migration.rb:378:incall'
actionpack (4.2.1) lib/action_dispatch/middleware/callbacks.rb:29:in block in call' activesupport (4.2.1) lib/active_support/callbacks.rb:88:incall'
activesupport (4.2.1) lib/active_support/callbacks.rb:88:in _run_callbacks' activesupport (4.2.1) lib/active_support/callbacks.rb:776:in_run_call_callbacks'
activesupport (4.2.1) lib/active_support/callbacks.rb:81:in run_callbacks' actionpack (4.2.1) lib/action_dispatch/middleware/callbacks.rb:27:incall'
actionpack (4.2.1) lib/action_dispatch/middleware/reloader.rb:73:in call' actionpack (4.2.1) lib/action_dispatch/middleware/remote_ip.rb:78:incall'
actionpack (4.2.1) lib/action_dispatch/middleware/debug_exceptions.rb:17:in call' web-console (2.1.2) lib/web_console/middleware.rb:37:incall'
actionpack (4.2.1) lib/action_dispatch/middleware/show_exceptions.rb:30:in call' railties (4.2.1) lib/rails/rack/logger.rb:38:incall_app'
railties (4.2.1) lib/rails/rack/logger.rb:20:in block in call' activesupport (4.2.1) lib/active_support/tagged_logging.rb:68:inblock in tagged'
activesupport (4.2.1) lib/active_support/tagged_logging.rb:26:in tagged' activesupport (4.2.1) lib/active_support/tagged_logging.rb:68:intagged'
railties (4.2.1) lib/rails/rack/logger.rb:20:in call' actionpack (4.2.1) lib/action_dispatch/middleware/request_id.rb:21:incall'
rack (1.6.0) lib/rack/methodoverride.rb:22:in call' rack (1.6.0) lib/rack/runtime.rb:18:incall'
activesupport (4.2.1) lib/active_support/cache/strategy/local_cache_middleware.rb:28:in call' rack (1.6.0) lib/rack/lock.rb:17:incall'
actionpack (4.2.1) lib/action_dispatch/middleware/static.rb:113:in call' rack (1.6.0) lib/rack/sendfile.rb:113:incall'
railties (4.2.1) lib/rails/engine.rb:518:in call' railties (4.2.1) lib/rails/application.rb:164:incall'
rack (1.6.0) lib/rack/content_length.rb:15:in call' puma (2.11.2) lib/puma/server.rb:507:inhandle_request'
puma (2.11.2) lib/puma/server.rb:375:in process_client' puma (2.11.2) lib/puma/server.rb:262:inblock in run'
puma (2.11.2) lib/puma/thread_pool.rb:104:in call' puma (2.11.2) lib/puma/thread_pool.rb:104:inblock in spawn_thread'

[josevalim]

Have you forgotten the if: :devise_controller? option when declaring your filter?

before_action :configure_permitted_parameters, if: :devise_controller?

[lguenier]

this is in my application_controller.rb:
before_action :configure_permitted_parameters, if: :devise_controller?

protected

def configure_permitted_parameters
devise_parameter_sanitizer.for(:account_update) { |u| u.permit(:email, :current_password, :password, :password_confirmation, :name, :surname, :sex) }
end

and this is in my update of users_controller.rb:

@user = User.find(params[:id])
@user.update_attributes(configure_permitted_parameters)

[josevalim]

Ah, that is it. Don't use configure_permitted_parameters there. It is meant to be used only inside Devise controllers (which yours isn't).

[lguenier]

OK, so how would I use it inside my users_controller.rb ?

[josevalim]

You can put { |u| u.permit(:email, :current_password, :password, :password_confirmation, :name, :surname, :sex) } inside a method and use it in both your controller and in the configure parameter call.

[lguenier]

I don't understand, in your tutorial https://github.com/plataformatec/devise#strong-parameters you show that you are putting the configure_permitted_parameters in the ApplicationController.

[vaibhavgeek]

Add this to your control_helper.rb file.

def resource_name
    :user
end

def resource
    @resource ||= User.new
end

def resource_class 
    User 
end

def devise_mapping
    @devise_mapping ||= Devise.mappings[:user]
end

[wenweih]

The same to #2451 ,the wiki may help you.