fohow_admin/db/migrate/20161017200008_create_article_cats.rb

# encoding:utf-8
class CreateArticleCats < ActiveRecord::Migration
  def self.up
    create_table :article_cats do |t|
      t.column  :name,      :string,      :null => false, :limit => 100
      t.column  :position,  :integer
      t.column  :ancestry,  :string,  :limit => 100
      t.column  :state,     :boolean, :default => false
    end
    add_index :article_cats, :position
    add_index :article_cats, :ancestry
    add_index :article_cats, :name
  end

  def self.down
    drop_table :article_cats
  end
end