Convert to use chartkick gem

config/initializers/assets.rb

@@ -12,3 +12,4 @@ Rails.application.config.assets.paths << Rails.root.join('node_modules')
 # application.js, application.css, and all non-JS/CSS in the app/assets
 # folder are already added.
 # Rails.application.config.assets.precompile += %w( admin.js admin.css )
+Rails.application.config.assets.precompile += %w(charts.js)

config/routes.rb

@@ -50,6 +50,7 @@ Rails.application.routes.draw do
   get 'crops/search' => 'crops#search', as: 'crops_search'
   resources :crops do
     get 'photos' => 'photos#index'
+    get 'sunniness' => 'crops#sunniness'
   end
 
   resources :comments