ruby on rails - No route matches {:action=>"change_name", :controller=>"users", :id=>nil} missing required keys: [:id] -

i've added gem "devise" , got error. can't understand what's wrong code. in advance!

error:

def user_form     common_options = { validate: true, html: { class: 'user-form' } }     form_options = current_user ? [ current_user, { url: change_user_name_path(current_user.id), method: :post, validate: true }.merge(common_options) ] : [ user.new, { validate: true }.merge(common_options) ]     form_for *form_options |f|       yield f     end   end 

routes

rails.application.routes.draw    devise_for :users   devise_for :usernames   root 'surveys#index'   resources 'surveys'   resources 'attempts'   resources 'users', only: [:create]    delete 'attempts/:survey_id/:user_id' => 'attempts#delete_user_attempts', as: :delete_user_attempts    post 'user/:id/change_name' => 'users#change_name', as: :change_user_name 

controller:

class userscontroller < applicationcontroller   def create     session[:user_id] = user.create(user_params).id     redirect_to :back   end    def change_name     @user = user.find(params[:id])     @user.update(user_params)     redirect_to :back   end    def user_params     params.require(:user).permit(:name)   end end 

can problem?

try remove method current_user model. because current_user default method of devise return current logged in user. overriding method of devise. that's why getting error of nil id because current_user don't has value.

it solve problem .