models/ontology/states.rb

	states.rb revision 66ae4e01390ec8ddfd3f6fa5361095d5d2f1c2bd
module Ontology::States
  extend ActiveSupport::Concern

  STATES = %w(pending downloading processing done failed)

  included do
    validates_inclusion_of :state, :in => STATES

    scope :state, ->(*states){
      where state: states.map(&:to_s)
    }

    STATES.each do |state|
      eval "def #{state}?; state == '#{state}'; end"
    end
  end

  module ClassMethods
    # Enqueues new parse jobs for all failed ontologies
    def retry_failed
      state(:failed).find_each do |ontology|
        ontology.versions.last.try :async_parse
      end
    end

    def count_by_state
      select("state, count(*) AS count").group(:state)
    end
  end

  def changeable?
    done? or failed?
  end
end