Lesson#18
Active Record Polymorphic Associations, gem carrierwave, Active Record Nested Attributes, gem cocoon https://drive.google.com/drive/folders/0B805LjyWemrdMmhndEU3ajNXWjQ
Active Record Polymorphic Associations, gem carrierwave, Active Record Nested Attributes, gem cocoon https://drive.google.com/drive/folders/0B805LjyWemrdMmhndEU3ajNXWjQ