* Son olarak **response**'u döndürür.

/// note | Teknik Detaylar

`yield` ile dependency'leriniz varsa, çıkış (exit) kodu middleware'den *sonra* çalışır.

Herhangi bir background task varsa ([Background Tasks](background-tasks.md) bölümünde ele alınıyor, ileride göreceksiniz), bunlar tüm middleware'ler *tamamlandıktan sonra* çalışır.

///

## Middleware Oluşturma { #create-a-middleware }

    Note over client,operation: Response is already sent, can't change it anymore
    opt Tasks
        operation -->> tasks: Send background tasks
    end
    opt Raise other exception
        tasks -->> tasks: Handle exceptions in the background task code
    end
```

/// info | Інформація

		"updated_at": nil,
		"deleted_at": time.Now(),
		"age":        20,
		"birthday":   time.Now(),
		"active":     f,
	}

	for k, v := range newValues {
		if err := userSchema.FieldsByDBName[k].Set(context.Background(), reflectValue, v); err != nil {
			t.Errorf("no error should happen when assign value to field %v, but got %v", k, err)
		}
	}
	newValues["updated_at"] = time.Time{}
	newValues["active"] = false

	}

	start, _, err := madmClnt.Heal(context.Background(), "healing-rewrite-bucket", "", opts, "", false, false)
	if err != nil {
		log.Fatalln(err)
	}
	fmt.Println("Healstart sequence ===")
	enc := json.NewEncoder(os.Stdout)
	if err = enc.Encode(&start); err != nil {
		log.Fatalln(err)
	}

	fmt.Println()
	for {

	c.processor.db.Logger.Warn(context.Background(), "removing callback `%s` from %s\n", name, utils.FileWithLineNum())
	c.name = name
	c.remove = true
	c.processor.callbacks = append(c.processor.callbacks, c)
	return c.processor.compile()
}

func (c *callback) Replace(name string, fn func(*DB)) error {
	c.processor.db.Logger.Info(context.Background(), "replacing callback `%s` from %s\n", name, utils.FileWithLineNum())

    Note over client,operation: El response ya fue enviado, no se puede cambiar
    opt Tasks
        operation -->> tasks: Enviar tareas en background
    end
    opt Lanzar otra excepción
        tasks -->> tasks: Manejar excepciones en el código de la tarea en background
    end
```

/// info | Información

# Concurrency and async / await { #concurrency-and-async-await }

Details about the `async def` syntax for *path operation functions* and some background about asynchronous code, concurrency, and parallelism.

## In a hurry? { #in-a-hurry }

<abbr title="too long; didn't read"><strong>TL;DR:</strong></abbr>

If you are using third party libraries that tell you to call them with `await`, like:

```Python
results = await some_library()
```

                    is_coroutine=is_coroutine,
                )
                if isinstance(raw_response, Response):
                    if raw_response.background is None:
                        raw_response.background = solved_result.background_tasks
                    response = raw_response
                else:
                    response_args = _build_response_args(

    Note over client,operation: Resposta já foi enviada, e não pode ser modificada
    opt Tarefas
        operation -->> tasks: Enviar tarefas de background
    end
    opt Lançar outra exceção
        tasks -->> tasks: Manipula exceções no código da tarefa de background
    end
```

/// info | Informação

	if err != nil {
		if !errors.Is(err, sarama.ErrOutOfBrokers) {
			target.loggerOnce(context.Background(), err, target.ID().String())
		}
		return err
	}

	producer, err := sarama.NewSyncProducerFromClient(client)
	if err != nil {
		if !errors.Is(err, sarama.ErrOutOfBrokers) {
			target.loggerOnce(context.Background(), err, target.ID().String())
		}
		return err
	}
	target.client = client