rails howto比較datetime？

Question

我在我的sqLite數據庫中有屬性starting_date（t.date：starting_date）的遊戲。 我想知道有alreday開始，所以我用這個代碼行的所有遊戲：

Game.find :all,:conditions=>"starting_date <= #{Date.today}" 
Game.find_by_sql("SELECT * FROM "games" WHERE (created_at < 2010-05-13)") 

結果是nill，儘管我知道我有遊戲之前已經開始像這樣的：

#<Game id: 1, team_1_id: 2, team_2_id: 1, status: 2, team_1_points: nil, team_2_points: nil, starting_date: "2010-05-05", winner: 1, sport: "football", country: nil, league: "calcio", created_at: "2010-04-07 00:09:21", updated_at: "2010-05-13 00:57:19"> 

我在這做錯了什麼？

Answer 1

Game.all(:conditions => ["starting_date <= ?", Date.today])