How do you model “Likes” in rails?

Question

I have 3 models: User, Object, Likes

Currently, I have the model: a user has many Objects. How do I go about modeling:

1) A user can like many objects

2

Answer 1

Models & associations as per naming conventions of rails modeling

class User < ActiveRecord::Base
  has_many :likes
  has_many :objects, :through => :likes
end

class Like < ActiveRecord::Base
  belongs_to :user
  belongs_to :object
end

class Object < ActiveRecord::Base
  belongs_to :user

  has_many :likes
  has_many :users, :through => :likes    
end

Also, you can use of already built-in gems like acts-as-taggable-on to have same functionality without code :)