combine 2 objects and sort rails 5

Question

I want to show a time link mixing comments and post so I have this objects

@posts = Post::all()
@comments = Comment::all()

If I do this

Answer 1

Solution#1 You can achieve this using UNION query.

sql= 'SELECT id, name, date FROM posts UNION ALL SELECT id, name, date FROM comments ORDER BY date'
ActiveRecord::Base.connection.execute(sql)

but union query will only work when you have same column names in both tables.

Solution#2 Add ordering logic in your view.

If you are simply displaying these records on html page then let them load on page without any specific order i.e.(first posts and then comments). Write javascript code to sort DOM elements which will run after page load.

for ref: Jquery - sort DIV's by innerHTML of children

Solution#3 Refactor your DB schema and put posts and comments in same database table. Then you will be able to query on single table. Something like this,

class Text < ActiveRecord::Base
end

class Post < Text 
end

class Comment < Text
end

Query will be Text.order(:date)

Refactoring your DB schema is too much to solve this problem. Do it if it makes sense for your application.