Ruby単体でのActive Recordのサンプル

active_record_sample.rb

require 'active_record'

ActiveRecord::Base.establish_connection(
  :adapter => 'sqlite3',
  :database => 'db/hatena.db'
)

class EntryInit < ActiveRecord::Migration
  def self.up
    create_table(:entries) do |t|
      t.column :link, :text
      t.column :title, :text
      t.column :count, :integer
      t.column :content, :text
    end
  end

  def self.down
    drop_table :entries
  end
end

if not ActiveRecord::Base.connection.table_exists? :entries
  EntryInit.migrate(:up)
end

class Entry < ActiveRecord::Base
  def to_s
    return "#{title}: #{count}"
  end
end