add catalog controller and modified root_path as store index file
add store index content
add css for store index
modified application view file and add styles
modified Using a Helper to Format the Price
add Caching of Partial Results
add scaffold cart, current_cart.rb in concerns for makes the current session look like a hash to the controller
add scaffold LineItem
add association, before_destroy method in product.rb, added add_to_cart button
modified line_items with cart related carts
modified cart show page
add quantity field migration and add quantity as default 1
add add_product method in cart model, modified cart show page with no of product times
add combine_items_in_cart
, add up and down methods
handling errors with invalid_cart method
remove cart_id from
list of parameters
add destroy for carts and redirect_to store_path after destroy
add total_price, modified carts show file with display total amount
modified carts show page with partials
add cart in left side pannel, redirect_to stores after line_items created