postgresql - 可成像类型未设置为多态关联

Question

我的 Rails 4.2 应用程序中有两个模型

class LandingPage < ActiveRecord::Base

  has_one :section2_photo, -> { where imageable_type: "Section2Photo"},
    class_name: Image, foreign_key: :imageable_id, foreign_type: :imageable_type, dependent: :destroy, as: :imageable

  has_one :section3_photo, -> { where imageable_type: "Section3Photo"},
    class_name: Image, foreign_key: :imageable_id, foreign_type: :imageable_type, dependent: :destroy, as: :imageable
end

和

class Image < ActiveRecord::Base
    belongs_to :imageable, polymorphic: true
end

我有 imageable_type 的问题，例如，如果我在控制台中这样做，它没有得到相应的设置

landingpage = LandingPage.first
image = landingpage.build_section2_photo

但是当我这样做的时候

image.imageable_type

我明白了

"LandingPage"

而不是

"Section2Photo"

Answer 1

只是为我删除的其他人发帖

as: :imageable

现在工作正常