discourse/db/migrate/20120530150726_create_forum_thread_user.rb

# frozen_string_literal: true

class CreateForumThreadUser < ActiveRecord::Migration[4.2]
  def up
    create_table :forum_thread_users, id: false do |t|
      t.integer :user_id, null: false
      t.integer :forum_thread_id, null: false
      t.boolean :starred, null: false, default: false
      t.boolean :posted, null: false, default: false
      t.integer :last_read_post_number, null: false, default: 1
      t.timestamps null: false
    end

    execute "DELETE FROM read_posts"

    add_index :forum_thread_users, %i[forum_thread_id user_id], unique: true

    drop_table :stars
    drop_table :last_read_posts
  end

  def down
    drop_table :forum_thread_users

    create_table :stars, id: false do |t|
      t.integer :parent_id, null: false
      t.string :parent_type, limit: 50, null: false
      t.integer :user_id, null: true
      t.timestamps null: false
    end

    add_index :stars, %i[parent_id parent_type user_id]

    create_table :last_read_posts do |t|
      t.integer :user_id, null: false
      t.integer :forum_thread_id, null: false
      t.integer :post_number, null: false
      t.timestamps null: false
    end

    add_index :last_read_posts, %i[user_id forum_thread_id], unique: true
  end
end