这是我的代码:
楷模:
class Article < ActiveRecord::Base
attr_accessible :title, :author, :content, :imageable_attributes
has_one :image, as: :imageable, dependent: :destroy
accepts_nested_attributes_for :image, allow_destroy: true
validates_presence_of :title, :content, :author
end
class Image < ActiveRecord::Base
mount_uploader :image, ImageUploader
attr_accessible :image, :caption, :imageable_id, :imageable_type, :article_ref
validates_presence_of :image
belongs_to :imageable, :polymorphic => true
end
这是我在控制台中尝试过的:
article = Article.create!(title: "test", content: "test", author: "test", image_attributes: {image: "test.jpg", caption: "test caption"})
这会创建一个没有错误的文章,但是如果我调用:
article.image
我得到:
=> nil
如果我输入控制台:
article = Article.new(title: "test", content: "test", author: "test")
article.build_image(image: "test.jpg")
我得到:
=> Validation failed: Image image can't be blank
非常感谢任何帮助,我很困惑!