ruby on rails - How to add ScriptTag on shopify_api gem? -

hi everyone,

i came across on problem can't figure out myself, believe expertise can me through solving error whenever try access route add script. here controller code: 

class homecontroller < authenticatedcontroller   def index     @products = shopifyapi::product.find(:all, :params => {:product_type => "underarmour"})     # script = shopifyapi::scripttag.new(:all, :params => {:event => "onload", :src => "https://shopperapproved.herokuapp.com/sajs/14043.js"})   end    def script      shopifyapi::scripttag.create(:event => "onload", :src => "https://shopperapproved.herokuapp.com/sajs/14043.js")   end end 

and route file is:

 controller :sessions     'login' => :new, :as => :login     post 'login' => :create, :as => :authenticate     'auth/shopify/callback' => :callback     'logout' => :destroy, :as => :logout   end     root :to => 'home#index'  match "script/",     :to => "home#script",     :via => :get 

i want add script accessing route: on index view:

 <h3>add shopperapproved site id:</h3> https://shopperapproved.herokuapp.com/script --> if going click link redirected homecontroller#script 

i hope can me.. 

have set seesion & token? fnot cant create script in store

https://github.com/shopify/shopify_api

i assume did not set session cant "connect" store.
verify have valide session , work