## SrIndex Model belongs_to JobbookIndex through jobbook_index_id
class SrIndex < ActiveRecord::Base
  belongs_to :jobbook_index
  attr_accessor :job_details

  def validate
    if JobbookIndex.validate_job(job_details)
      self.jobbook_index_id = job_details
    else
      errors.add("Not a valid job")
    end
  end

end

## JobbookIndex model has_many SrIndex along with other models using this field, I'd like to duplicate this method in multiple call backs
class JobbookIndex < ActiveRecord::Base
  has_many :sr_indices

  def self.invalidate_job(id)
    query = find_by_id(id)

    if query.nil?
      false
    else
      true
    end
  end


end