37 lines
909 B
Ruby
37 lines
909 B
Ruby
# encoding: utf-8
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class StockArticle < Article
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acts_as_paranoid
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has_many :stock_changes
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scope :available, :conditions => "quantity > 0"
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before_destroy :check_quantity
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# Update the quantity of items in stock
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def update_quantity!
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update_attribute :quantity, stock_changes.collect(&:quantity).sum
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end
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# Check for unclosed orders and substract its ordered quantity
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def quantity_available
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quantity - OrderArticle.where(article_id: id).
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joins(:order).where("orders.state = 'finished'").sum(:units_to_order)
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end
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def self.stock_value
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available.collect { |a| a.quantity * a.gross_price }.sum
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end
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protected
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def check_quantity
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raise "#{name} kann nicht gelöscht werden. Der Lagerbestand ist nicht null." unless quantity == 0
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end
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# Overwrite Price history of Article. For StockArticles isn't it necessary.
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def update_price_history
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true
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end
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end
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