activerecord/lib/active_record/associations/preloader/belongs_to.rb


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module ActiveRecord
  module Associations
    class Preloader
      class BelongsTo < SingularAssociation #:nodoc:

        def association_key_name
          reflection.options[:primary_key] || klass && klass.primary_key
        end

        def owner_key_name
          reflection.foreign_key
        end

      end
    end
  end
end