Module: ActiveRecord::Turntable::ActiveRecordExt::CleverLoad

Extended by:
ActiveSupport::Concern
Defined in:
lib/active_record/turntable/active_record_ext/clever_load.rb

Instance Method Summary collapse

Instance Method Details

#clever_load!(association_name) ⇒ Object 



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# File 'lib/active_record/turntable/active_record_ext/clever_load.rb', line 12

def clever_load!(association_name)
  # load records
  records = self.to_a
  klass = records.first.class
  association_key = association_name.to_s
  reflection = klass.reflections[association_key]

  if reflection
    foreign_class = reflection.klass
    foreign_objects = case reflection.macro
                      when :has_one
                        foreign_class.where(reflection.foreign_key => records.map(&reflection.association_primary_key.to_sym).uniq)
                      when :belongs_to
                        foreign_class.where(reflection.association_primary_key => records.map(&reflection.foreign_key.to_sym).uniq)
                      else
                        []
                      end

    self.each do |obj|
      matched_object = case reflection.macro
                       when :has_one
                         foreign_objects.find { |fo|
                           obj.send(reflection.association_primary_key) == fo.send(reflection.foreign_key)
                         }
                       when :belongs_to
                         foreign_objects.find { |fo|
                           obj.send(reflection.foreign_key) == fo.send(reflection.association_primary_key)
                         }
                       end
      obj.association(association_name).target = matched_object
      obj.association(association_name).set_inverse_instance(matched_object) if matched_object
      obj.association(association_name).loaded!
    end
  end
  records
end