gitlabhq/app/models/milestone.rb

# == Schema Information
#
# Table name: milestones
#
#  id          :integer          not null, primary key
#  title       :string(255)      not null
#  project_id  :integer          not null
#  description :text
#  due_date    :date
#  closed      :boolean          default(FALSE), not null
#  created_at  :datetime         not null
#  updated_at  :datetime         not null
#

class Milestone < ActiveRecord::Base
  attr_accessible :title, :description, :due_date, :closed

  belongs_to :project
  has_many :issues
  has_many :merge_requests

  validates :title, presence: true
  validates :project, presence: true
  validates :closed, inclusion: { in: [true, false] }

  def self.active
    where("due_date > ? OR due_date IS NULL", Date.today)
  end

  def participants
    User.where(id: issues.pluck(:assignee_id))
  end

  def open_items_count
    self.issues.opened.count + self.merge_requests.opened.count
  end

  def closed_items_count
    self.issues.closed.count + self.merge_requests.closed.count
  end

  def total_items_count
    self.issues.count + self.merge_requests.count
  end

  def percent_complete
    ((closed_items_count * 100) / total_items_count).abs
  rescue ZeroDivisionError
    100
  end

  def expires_at
    "expires at #{due_date.stamp("Aug 21, 2011")}" if due_date
  end
end