Multiple has_many :through

Question

In object model, I have

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

How do I get the list of users for likes? E.g. object.users <--- but how do I specify through likes or hates?

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 that I need to add source too. If not Rails will be looking 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'