0

Appointment#serializable_hash次のような関数があります。

  def serializable_hash(options={})
    options = { 
      :methods => %w( 
        notes
        client
        services
        products
        has_payments
        start_time_ymd
        start_time_time
        calculated_length
        day_of_week_index
        services_with_info
        products_with_info
        payments_with_info
        stylist_name_index
        time_block_type_code
        client_name_that_fits
        minutes_since_midnight
        generous_calculated_length
      )}.update(options)
    super(options)
  end

既存のAppointmentオブジェクトで関数を呼び出すと、SQL の実行は次のようになります。

  Appointment Load (4.6ms)  SELECT "appointment".* FROM "appointment" ORDER BY start_time DESC LIMIT 1
  Appointment Load (0.6ms)  SELECT "appointment".* FROM "appointment" WHERE "appointment"."id" = $1 LIMIT 1  [["id", 4533]]
  Client Load (0.7ms)  SELECT "client".* FROM "client" WHERE "client"."id" = 398 LIMIT 1
  Address Load (0.5ms)  SELECT "address".* FROM "address" WHERE "address"."id" = 10 LIMIT 1
   (15.4ms)  SELECT COUNT(*) FROM "payment" WHERE "payment"."appointment_id" = 4533
  TimeBlockType Load (11.1ms)  SELECT "time_block_type".* FROM "time_block_type" WHERE "time_block_type"."id" = 2 LIMIT 1
  AppointmentService Load (30.3ms)  SELECT "appointment_service".* FROM "appointment_service" WHERE "appointment_service"."appointment_id" = 4533
  Service Load (18.7ms)  SELECT "service".* FROM "service" WHERE "service"."id" = 295 ORDER BY name LIMIT 1
  AppointmentProduct Load (6.2ms)  SELECT "appointment_product".* FROM "appointment_product" WHERE "appointment_product"."appointment_id" = 4533
  Payment Load (0.5ms)  SELECT "payment".* FROM "payment" WHERE "payment"."appointment_id" = 4533
  Stylist Load (15.5ms)  SELECT "stylist".* FROM "stylist" WHERE "stylist"."active" = 't' AND "stylist"."id" = 84 LIMIT 1
  StylistEmploymentType Load (0.7ms)  SELECT "stylist_employment_type".* FROM "stylist_employment_type" WHERE "stylist_employment_type"."code" = 'CHAIR_RENTAL' LIMIT 1
  Salon Load (0.7ms)  SELECT "salon".* FROM "salon" WHERE "salon"."id" = 29 LIMIT 1
  Stylist Load (1.0ms)  SELECT "stylist".* FROM "stylist" WHERE "stylist"."active" = 't' AND (salon_id = 29 AND active = true AND name != 'R.')
  StylistEmploymentType Load (0.3ms)  SELECT "stylist_employment_type".* FROM "stylist_employment_type" WHERE "stylist_employment_type"."code" = 'CHAIR_RENTAL' LIMIT 1
  StylistEmploymentType Load (0.3ms)  SELECT "stylist_employment_type".* FROM "stylist_employment_type" WHERE "stylist_employment_type"."code" = 'CHAIR_RENTAL' LIMIT 1
  StylistEmploymentType Load (0.3ms)  SELECT "stylist_employment_type".* FROM "stylist_employment_type" WHERE "stylist_employment_type"."code" = 'CHAIR_RENTAL' LIMIT 1
  StylistEmploymentType Load (0.3ms)  SELECT "stylist_employment_type".* FROM "stylist_employment_type" WHERE "stylist_employment_type"."code" = 'CHAIR_RENTAL' LIMIT 1
  StylistEmploymentType Load (0.3ms)  SELECT "stylist_employment_type".* FROM "stylist_employment_type" WHERE "stylist_employment_type"."code" = 'CHAIR_RENTAL' LIMIT 1
  StylistEmploymentType Load (0.2ms)  SELECT "stylist_employment_type".* FROM "stylist_employment_type" WHERE "stylist_employment_type"."code" = 'CHAIR_RENTAL' LIMIT 1
  Service Load (3.6ms)  SELECT "service".* FROM "service" INNER JOIN "appointment_service" ON "service"."id" = "appointment_service"."service_id" WHERE "appointment_service"."appointment_id" = 4533 ORDER BY name
  Product Load (16.5ms)  SELECT "product".* FROM "product" INNER JOIN "appointment_product" ON "product"."id" = "appointment_product"."product_id" WHERE "appointment_product"."appointment_id" = 4533 ORDER BY brand_id, name

明らかに、それは可能な限り効率的ではありません。serializable_hash可能な限り少ない数のクエリで実行するにはどうすればよいですか? 関与しないで、私がやっていることを行うためのより良い方法はおそらくありserializable_hashますか?

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1 に答える 1

-1

私の問題は悪い設計に起因していたので、 RABLを使用して悪い設計を修正しました。

于 2013-02-22T18:50:56.207 に答える