ruby - Rails Beginner NoMethodError in PinsController#new -

having issues keep getting error undefined method `pins' nil:nilclass, can explain how fix error. been following tutorial , got stuck.

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pins_controller.rb

class pinscontroller < applicationcontroller     before_action :find_pin, only: [:show, :edit, :update, :destroy]       def index         @pins = pin.all.order("created_at desc")     end      def new         @pin = current_user.pins.build     end       def create         @pin = current_user.pins.build(pin_params)          if @pin.save             redirect_to @pin, notice: "successfully created new pin"         else             render 'new'         end     end      def edit      end      def update         if @pin.update(pin_params)             redirect_to @pin, notice: "pin updated!"         else             render 'edit'         end     end       def destroy         @pin.destroy         redirect_to root_path     end       private      def pin_params         params.require(:pin).permit(:title, :description)     end      def find_pin         @pin = pin.find(params[:id])     end end 

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user.rb

class user < activerecord::base   # include default devise modules. others available are:   # :confirmable, :lockable, :timeoutable , :omniauthable   devise :database_authenticatable, :registerable,          :recoverable, :rememberable, :trackable, :validatable     has_many :pins      end 

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pin.rb

class pin < activerecord::base     belongs_to :user end 

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routes.rb

rails.application.routes.draw   devise_for :users resources :pins  root "pins#index" end 

if using gem devise helper method current_user returns current logged in user in session.

pleases make sure user logged in/

you can make sure user logged in adding before_action :authenitcate_user! in application controller(for actions in application).