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find_each 似乎不能很好地处理使用 finder_sql 的 ActiveRecord 关系。以前有没有人处理过这个问题？例如：

class User < ActiveRecord::Base
  has_many :games, :dependent => :destroy,
           :finder_sql =>
              proc {"SELECT * FROM games WHERE player_0_id = #{id} OR player_1_id = #{id}"}
end

class Game < ActiveRecord::Base
  belongs_to :player_0, :class_name => "User", :foreign_key => "player_0_id", :inverse_of => :games
  belongs_to :player_1, :class_name => "User", :foreign_key => "player_1_id", :inverse_of => :games
end

调用 @user.games.each 可以正常工作，并遍历我们关心的所有游戏。但是调用 @user.games.find_each 会导致：

ActiveRecord::StatementInvalid:
   SQLite3::SQLException: no such column: games.user_id: SELECT  "games".* FROM "games"  WHERE "games"."user_id" = 2 AND ("games"."id" >= 0) ORDER BY "games"."id" ASC LIMIT 1000
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1 回答 1

0

看看http://compositekeys.rubyforge.org/来解决给定的问题。

于 2013-04-02T16:37:42.783 回答