将ActiveRecord对象及其子项合并在一起

Question

我必须使用名为DraftPost和PublishedPost的相同模型。我尝试从特定网站查找草稿帖子和发布的帖子，然后将它们合并在一起。

draft_posts = DraftPost.where(:site_id => params[:site_id]).includes(:comments)
#=> 3 draft posts 

published_posts = PublishedPost.where(:site_id => params[:site_id]).includes(:comments)
#=> 2 published posts

# here I want to merge the draft_posts to the published_posts. e.g;
published_posts.merge(draft_posts)
#=> here the result should be 3 published posts (update the existing two and create one new)

你会怎么做？感谢。

Answer 1

尝试：

published_posts << draft_posts.collect

Answer 2

使用+连接两个数组：

all_posts = published_posts + draft_posts