fab-manager/db/migrate/20160628131408_create_events_event_themes.rb

class CreateEventsEventThemes < ActiveRecord::Migration
  def change
    create_table :events_event_themes do |t|
      t.belongs_to :event, index: true, foreign_key: true
      t.belongs_to :event_theme, index: true, foreign_key: true
    end
  end
end