Multiple has_many: through

Question

In the object model, I have

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

How do I get a list of users for like? For instance. object.users <--- but how can I indicate through sympathy or hatred?

Answer 1

You need to give these two different associations different names. What about

 has_many :likes has_many :hates has_many :likers, :through => :likes, :source => :user has_many :haters, :through => :hates, :source => :user 

Answer 2

It seems I need to add a source too. If not Rails will look for likers / liker in likes.

 has_many :likes has_many :hates has_many :likers, :through => :likes, :class_name => 'User', :source => 'user' has_many :haters, :through => :hates, :class_name => 'User', :source => 'user' 

Answer 3

You can do it like:

 has_many :user_likes, :through => :likes, :class_name => 'User'