4-2 Ajax

Source: Internet
Author: User

Exercise: Add a button next to each item in the cart, click Minus One, and the quantity is 0 to delete the item. Use the usual method to use AJAX support first.

1. Custom method Decrease, set the path routes.rb for it. put ' decrease ' in Resouurces:line_items's block, on:: Member

2. Define this method in the controller.

  • Attention?? : You need to declare the instance variable @cart in action because you want to use render @cart render the front page sidebar. Here are the methods in the previous module Currentcart Set_cart, by Before_action, using Set_cart .
  • Use the Destroy method when you reduce to one.
  • Add Format.js in respond_to block
3. A decrease.js.erb is defined in the view template. With jquery: $ (' #cart '). HTML ("<%= J render (@cart)%>");

4-2 Ajax

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