如何在ActiveRecord的说明中编写查询

Question

表格：

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

我的SQL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;

我是RoR和ActiveRecord的新手。有人可以帮我在ActiveRecord中编写上述查询吗？

我正在使用Rails 5.2

Answer 1

我在ActiveRecord中解决了上述查询：

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')