Ruby on rails 如何在ActiveRecord的描述中编写查询

表：

我的sql查询：

posts - id, title, description, vote_count
post_votes - id, user_id, post_id, vote

我不熟悉RoR和ActiveRecord。有人能帮我在ActiveRecord中编写上面的查询吗

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我正在使用Rails 5.2解决ActiveRecord中的上述查询：

SELECT posts.*, (select vote from post_votes where post_votes.post_id = posts.id and post_votes.user_id = 1) as my_vote FROM posts;

Post.select("posts.*, (select vote from post_votes where post_votes.post_id = posts.id and post_votes.user_id = 1) as my_vote").order('created_at DESC')