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class Book < ActiveRecord::Base
belongs_to :author
has_many :citations, foreign_key: "book1_id"
has_many :references, -> { distinct }, through: :citations, source: :reference_of
has_many :subscriptions
has_many :subscribers, through: :subscriptions
enum status: [:proposed, :written, :published]
enum read_status: { unread: 0, reading: 2, read: 3, forgotten: nil }
enum nullable_status: [:single, :married]
enum language: [:english, :spanish, :french], _prefix: :in
enum author_visibility: [:visible, :invisible], _prefix: true
enum illustrator_visibility: [:visible, :invisible], _prefix: true
enum font_size: [:small, :medium, :large], _prefix: :with, _suffix: true
enum difficulty: [:easy, :medium, :hard], _suffix: :to_read
enum cover: { hard: "hard", soft: "soft" }
def published!
super
"do publish work..."
end
end
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