Efficient counting of an association’s association
- by Matthew Robertson
In my app, when a User makes a Comment in a Post, Notifications are generated that marks that comment as unread.
class Notification < ActiveRecord::Base
belongs_to :user
belongs_to :post
belongs_to :comment
class User < ActiveRecord::Base
has_many :notifications
class Post < ActiveRecord::Base
has_many :notifications
I’m…
