【发布时间】:2012-05-14 16:24:51
【问题描述】:
我有以下型号:
class User < ActiveRecord::Base
has_one :image_assignment, as: :imageable
has_one :image, through: :image_assignment
end
class ImageAssignment < ActiveRecord::Base
belongs_to :image
belongs_to :imageable, polymorphic: true
end
class Image < ActiveRecord::Base
mount_uploader :image, ImageUploader
end
u = User.new
u.create_image #=> undefined method `create_image'
【问题讨论】:
标签: ruby-on-rails activerecord ruby-on-rails-3.1 associations polymorphic-associations