socialforge/db/migrate/20150819090720_create_memo_messages.rb

class CreateMemoMessages < ActiveRecord::Migration
  def change
    create_table :memo_messages do |t|
      t.integer :user_id
      t.integer :forum_id
      t.integer :memo_id
      t.string :memo_type
      t.integer :viewed

      t.timestamps
    end
  end
end