Rails - Ordering active record

Simple order

We use order to sort records in some ways. For example: Post.order created_at: :desc

Reorder

If you want to override previously set order (even through default_scope), use reorder() instead.

User.order(id: :asc).reorder(name: :desc)

will ignore ordering by id completely

Ordering on associations

• Using includes

  current_user.conversations.includes(:messages).order("messages.created_at
  DESC")
  

• Using merge

   current_user.conversations.joins(:message).merge(Message.order created_at:
   :desc)