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class RelatedAsset < ApplicationRecord
belongs_to :page
belongs_to :asset
acts_as_list :scope => :page_id
default_scope -> { order("position ASC") }
validate :headline_only_for_images
private
def headline_only_for_images
return unless asset
errors.add(:headline, "can only be set on image or PDF assets") if headline? && !(asset.image? || asset.pdf?)
end
end
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