class CreateSeoMetaForBlog < ActiveRecord::Migration def up unless ::SeoMetum.table_exists? create_table ::SeoMetum.table_name do |t| t.integer :seo_meta_id t.string :seo_meta_type t.string :browser_title t.string :meta_keywords t.text :meta_description t.timestamps end add_index ::SeoMetum.table_name, :id add_index ::SeoMetum.table_name, [:seo_meta_id, :seo_meta_type] end end def down # can't drop the table because someone else might be using it. end end