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

To elaborate further on my comment to Brandon Tilley's answer, I would suggest the following:

class User < ActiveRecord::Base
  # your original association
  has_many :things

  # the like associations
  has_many :likes
  has_many :liked_things, :through => :likes, :source => :thing
end

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

class Thing < ActiveRecord::Base
  # your original association
  belongs_to :user

  # the like associations
  has_many :likes
  has_many :liking_users, :through => :likes, :source => :user
end