ruby-on-rails - 递归 :include in Rails ActiveRecord

Question

说我有这些模型

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

这样我才能做到

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

我怎么说我还想包括评论的用户？

Answer 1

我相信 :include => {:comments => :user}应该管用。