一个模型可以属于多个模型吗？
class Comment < ActiveRecord::Base
belongs_to :post
belongs_to :user
end
那么通过上述关联，我可以从给定的评论对象中获取用户和帖子详细信息吗？。
另请注意
@comment.post.post_title and
@comment.user.user_name.
，我已使用评论作为帖子的嵌套资源。
resources :posts do
resources :comments
end
class Comment < ActiveRecord::Base
belongs_to :post
belongs_to :user
end
So with the above association can I fetch both user and post details from a given comment object?.
like
@comment.post.post_title and
@comment.user.user_name.
Also please note that I have used comment as a nested resource of post.
resources :posts do
resources :comments
end
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是的，您可以，并且不需要指定外键或类名来执行此操作。说
belongs_to :user意味着 Rails 将在注释表中查找 user_id 整数字段，并期望存在名为 User 的 ActiveRecord 类。添加任意多个，它们不会互相干扰。
Yes you can, and you don't need to specify the foreign key or class name to do so. Saying
belongs_to :usermeans rails will look for a user_id integer field in the comments table, and expect an ActiveRecord class named User to exist.Add as many as you like, they don't interfere with each other.