forgeplus/db/migrate/20191220085133_create_compose_users.rb

class CreateComposeUsers < ActiveRecord::Migration[5.2]
  def change
    # create_table :compose_users do |t|
    #   t.integer :user_id
    #   t.integer :compose_id
    #   t.integer :is_manager, default: 0
    #
    #   t.timestamps
    # end
    # add_index :compose_users, [:user_id, :compose_id]
  end
end