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class Milestone < ActiveRecord::Base belongs_to :project has_many :issues validates_presence_of :project_id validates_presence_of :title def self.active
where("due_date > ? OR due_date IS NULL", Date.today)
end def percent_complete @percent_complete ||= begin total_i = self.issues.count closed_i = self.issues.closed.count if total_i > 0 (closed_i * 100) / total_i else 100 end rescue => ex 0 end end def expires_at "expires at #{due_date.stamp("Aug 21, 2011")}" if due_date end end