petities/petitions.eu

class Image < ApplicationRecord
  belongs_to :imageable, polymorphic: true

  validates :alt_label, length: { maximum: 255 }, allow_blank: true

  has_attached_file :upload,
                    styles: {
                      listing: {
                        geometry: 'x400>',
                        convert_options: '-strip -quality 85'
                      },
                      thumb: {
                        convert_options: '-strip -quality 85 -resize "272.59375x200^" -gravity center -extent "272.59375x200"'
                      }
                    },
                    default_url: '/assets/:style/missing.png'

  validates_with AttachmentContentTypeValidator,
                 attributes: :upload,
                 content_type: ['image/jpeg', 'image/png', 'image/gif']

  validates_with AttachmentFileNameValidator,
                 attributes: :upload,
                 matches: [/png\Z/i, /jpe?g\Z/i, /gif\Z/i]

  validates_with AttachmentSizeValidator,
                 attributes: :upload,
                 less_than: 10.megabytes
end