rails g image
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app/models/image.rb model file
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app/uploaders/acts_as_imageable/file_uploader.rb carrierwave uploader. add versions and processes here
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app/models/concerns/acts_as_imageable/images_attribute.rb a model concern that adds the images attribute to imageable objects
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db/migrate/20130725154554_create_images.rb migration
- clean up tests