遞歸：包括在Rails的ActiveRecord的

Question

說我有這些模型

class Project < ActiveRecord::Base 
    has_many :comments 
end 

class Comment < ActiveRecord::Base 
    belongs_to :project 
    belongs_to :user 
end 

class User < ActiveRecord::Base 
    has_many :comments 
end 

所以，我可以做

p = Project.find(1, :include => :comments) 
p.comments.collect(&:user).collect(&:name) # this executes select for each user 

我怎麼說我也想有評論的用戶？

Answer 1

我認爲:include => {:comments => :user}應該工作。