class PrinterJob < ActiveRecord::Base belongs_to :order belongs_to :created_by, class_name: 'User', foreign_key: 'created_by_user_id' belongs_to :finished_by, optional: true, class_name: 'User', foreign_key: 'finished_by_user_id' has_many :printer_job_updates scope :finished, -> { where.not(finished_at: nil) } scope :unfinished, -> { where(finished_at: nil).order(:id) } scope :pending, -> { unfinished.includes(:order).where.not(orders: {state: 'open'}) } scope :queued, -> { unfinished.includes(:order).where(orders: {state: 'open'}) } def last_update_at printer_job_updates.order(:created_at).last.try(&:created_at) end def last_update_state printer_job_updates.order(:created_at).last.try(&:state) end def add_update!(state, message=nil) return unless finished_at.nil? PrinterJobUpdate.create! printer_job: self, state: state, message: message end def finish!(user=nil) return unless finished_at.nil? update_attributes finished_at: Time.now, finished_by: user end end