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25 lines
620 B
Ruby
25 lines
620 B
Ruby
class BookInstance < ActiveRecord::Base
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attr_accessible :book_id, :user_id, :public
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validates_presence_of :book_id, :user_id
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belongs_to :book
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belongs_to :user
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delegate :name, :image, :isbn, to: :book, prefix: false
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delegate :name, to: :user, prefix: true
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delegate :preferred_name, to: :user, prefix: true
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has_many :borrow_records
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has_many :borrowers, :source => :user, through: :borrow_records
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def borrowed?
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!borrow_records.where(return_date: nil).empty?
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end
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def current_borrower
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if borrowed?
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User.find_by_id borrow_records.where(return_date: nil)[0].user_id
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end
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end
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end
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