Ruby on Rails 2015-06-16

1. Route the pages.
(1) If you want to be able to route to your new view, open config/routes.rb and add the line

get 'view_name/index'

(2) If you want to set the default page to a certain, open config/routes.rb file, add

root 'store#index', as: 'store'

So the index will be routed to the index of controller store. The as: 'store' tells Rails to create a store_path accessor method.

2. yield method in view/layouts/application.html.erb. This method will render the content of the view that user is currently browsing. For example, if the user is browsing http://localhost/store, then the content of views/store/index.html.erb will be rendered in the yield section. Similarly, if the user is browsing http://localhost/products, then the content of views/products/index.html.erb will be rendered.

3. Did "rake test" but encountered five errors:
(1) AbstractController::Helpers::MissingHelperError: Missing helper file helpers//users/alexsun/documents/rubys/workspace/depot/app/helpers/application_helper.rb_helper.rb

(2) ProductsControllerTest#test_should_show_product:
ActionView::MissingTemplate: Missing template products/show, application/show with {:locale=>[:en], :formats=>[:html], :variants=>[], :handlers=>[:erb, :builder, :raw, :ruby, :coffee, :jbuilder]} 

(3) - (5) similar to (2), all are "Missing template"

I didn't see these error when I was using Ruby 2.2.0. But after that I switched back to Ruby 2.0.0 and then these error appears. I fixed them by changing my workspace name "Depot" to "depot" and all errors are gone. It seems to me a Ruby bug which is in Ruby 2.0.0 but fixed in Ruby 2.2.0.