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carousel.rb 251 B
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adding carousel model
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class Carousel < ActiveRecord::Base
  has_attached_file :image, styles: {
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    larger: "400x500>",
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    thumbnail: "100x100>"
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    }, default_url: "/images/:style/missing.png"
  validates_attachment_content_type :image, content_type: /\Aimage\/.*\Z/
end