Question

我有两个型号

class LunchSet < ActiveRecord::Base
  has_many :sides
end

class Side < ActiveRecord::Base
  attr_accessible :set_id

  belongs_to :lunch_set, foreign_key: :set_id

end

但是，当我创建对象新的LunchSet'l'，id为= 1，而新的side''s'with set_id = 1时，输入l.sides只是给我sql错误，说

SQLite3::SQLException: no such column: sides.lunch_set_id: SELECT "sides".* FROM "sides"  WHERE "sides"."lunch_set_id" = 52

你可以看到它仍然在寻找一个'lunch_set_id'列，而不是像我想要的那样'set_id'......

Answer 1

您需要在LunchSet模型中定义外键

class LunchSet < ActiveRecord::Base
  has_many :sides, :class_name => 'Side', :foreign_key => 'set_id'
end

class Side < ActiveRecord::Base
  attr_accessible :set_id

  belongs_to :lunch_set, :class_name => 'LunchSet', :foreign_key => 'set_id'

end

foreign_key：方法不起作用

1 个答案: