ruby on rails - RoR - undefined method `hello' for Karlsgem::KarlsGeming:Class -

undefined method `hello' karlsgem::karlsgeming:class

please help, want display string in view cant seem wrap head around this?? in wrong file?

karlsgem.rb

require "karlsgem/version"  module karlsgem     class karlsgeming         def hello             puts "hello world"         end      end end 

index.html.erb

<% if notice %> <p id="notice" ><%= notice %></p> <% end %>  <%= @kgem %>  <h1>your drinks catalog</h1> <% @products.each |product| %> <div class="entry" > <%= image_tag(product.image_url) %> <h3><%= product.title %></h3> <%=sanitize product.description %> <div class="price_line" > <span class="price" >€<%= product.price %></span> <%= button_to 'add cart' , line_items_path(:product_id => product) %> </div> </div> <% end %> 

store_controller.rb

require 'karlsgem'  class storecontroller < applicationcontroller   def index @products = product.all @cart = current_cart  @kgem = karlsgem::karlsgeming.hello    end end 

you defined hello instance method. in order karlsgem::karlsgeming.hello have define class method:

require "karlsgem/version" module karlsgem   class karlsgeming     def self.hello         puts "hello world"     end   end end