rails howto比较datetime？

Question

我在我的sqLite数据库中有属性starting_date（t.date：starting_date）的游戏。 我想知道有alreday开始，所以我用这个代码行的所有游戏：

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

结果是nill，尽管我知道我有游戏之前已经开始像这样的：

#<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"> 

我在这做错了什么？

Answer 1

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