不能将 Activerecord 查找方法与关联一起使用

Question

这是我的模型：

#game 
class Game < ActiveRecord::Base
  #relationships with the teams for a given game
  belongs_to :team_1,:class_name=>"Team",:foreign_key=>"team_1_id"
  belongs_to :team_2,:class_name=>"Team",:foreign_key=>"team_2_id"

  def self.find_games(name)
  items = Game.find(:all,:include=>[:team_1,:team_2] , :conditions => ["team_1.name = ?", name] )     
  end
end

#teams
class Team < ActiveRecord::Base
  #relationships with games
  has_many :games, :foreign_key  =>'team_1'
  has_many :games, :foreign_key  =>'team_2'
end

当我执行 Game.find_games("real") 我得到： ActiveRecord::StatementInvalid: SQLite3::SQLException: no such column: team_1.name

如何解决我认为使用 :include 可以解决问题的问题。

Answer 1

Team_1 不是表的名称。这些条件不适用于 ruby​​ 中定义的关联，但适用于表本身。条件应为：:conditions => ["teams.name = ?", name]

另外，我认为teams类是不正确的，你当然不能定义游戏两次，外键应该和belongs的一样：

#teams
class Team < ActiveRecord::Base
  #relationships with games
  has_many :team_1_games, :class_name => "Game", :foreign_key  =>'team_1_id'
  has_many :team_2_games, :class_name => "Game", :foreign_key  =>'team_2_id'
end

有一个更好的方法可以做到这一点，但我想不起来了。