我很难获得updated_at专栏来更新赌场模型,通过CasinoAmenity提供has_many设施.添加便利设施时,赌场的updated_at列会正确更新,但在删除时则不会.
这是我的(简化)模型:
casino.rb
class Casino < ActiveRecord::Base
has_many :amenity_casino, :dependent => :destroy
has_many :amenities, :through => :amenity_casino
end
amenity_casino.rb
class AmenityCasino < ActiveRecord::Base
belongs_to :casino, :touch => true
belongs_to :amenity, :touch => true
end
amenity.rb
class Amenity < ActiveRecord::Base
has_many :amenity_casinos, :dependent => :destroy
has_many :casinos, :through => :amenity_casinos
end
现在到控制台.检查初始updated_at时间.
> Casino.find(5).updated_at
=> Wed, 30 Jan 2013 00:30:04 UTC +00:00
为赌场添加便利设施.
> Casino.find(5).amenities << Amenity.first
=> [#<Amenity id: 1, name: "asdf", weight: "", created_at: "2012-11-10 02:29:14", updated_at: "2013-01-30 01:29:14", …