# Body - Multiple Parameters { #body-multiple-parameters }

Now that we have seen how to use `Path` and `Query`, let's see more advanced uses of request body declarations.

## Mix `Path`, `Query` and body parameters { #mix-path-query-and-body-parameters }

First, of course, you can mix `Path`, `Query` and request body parameter declarations freely and **FastAPI** will know what to do.

Ten en cuenta que los dataclasses no pueden hacer todo lo que los modelos de Pydantic pueden hacer.

Así que, podrías necesitar seguir usando modelos de Pydantic.

Pero si tienes un montón de dataclasses por ahí, este es un buen truco para usarlos para potenciar una API web usando FastAPI. 🤓

///

## Dataclasses en `response_model` { #dataclasses-in-response-model }

También puedes usar `dataclasses` en el parámetro `response_model`:

# Custom Response - HTML, Stream, File, others { #custom-response-html-stream-file-others }

By default, **FastAPI** will return the responses using `JSONResponse`.

You can override it by returning a `Response` directly as seen in [Return a Response directly](response-directly.md){.internal-link target=_blank}.

Adam Murdoch <******@****.***> <******@****.***>
Adam Murdoch <******@****.***> <******@****.***>
Adam Murdoch <******@****.***> <******@****.***>
Adrian Kelly <******@****.***> <******@****.***>
Benjamin Muschko <ben@gradle.com> <******@****.***>
Cedric Champeau <******@****.***>
Cedric Champeau <******@****.***> <******@****.***>
Cedric Champeau <******@****.***> <******@****.***>

    * <a href="https://fastapi.tiangolo.com/features/" class="external-link" target="_blank">**Et bien d'autres fonctionnalités**</a> comme la validation automatique, la sérialisation, l'authentification avec OAuth2 JWT tokens, etc.
* Hashage de **mots de passe sécurisé** par défaut.
* Authentification par **jetons JWT**.

## Gelecek

Şimdiye kadar, **FastAPI**'ın fikirleriyle birçok kişiye faydalı olduğu apaçık ortada.

Birçok kullanım durumuna daha iyi uyduğu için, önceki alternatiflerin yerine seçiliyor.

Ben ve ekibim dahil, birçok geliştirici ve ekip projelerinde **FastAPI**'ya bağlı.

Tabi, geliştirilecek birçok özellik ve iyileştirme mevcut.

**FastAPI**'ın önünde harika bir gelecek var.

		},
		Totals: madmin.RStat{
			Count: float64(rt.SinceUptime.Count),
			Bytes: rt.SinceUptime.Bytes,
		},
		ErrCounts: errCounts,
	}
}

func (rt *RTimedMetrics) addsize(size int64, err error) {
	// failures seen since uptime
	atomic.AddInt64(&rt.SinceUptime.Bytes, size)
	atomic.AddInt64(&rt.SinceUptime.Count, 1)
	rt.LastMinute.addsize(size)
	rt.LastHour.addsize(size)

                        return true;
                    }
                    String packageName = getPackageName(file);
                    // we pass through package-info.java files for packages we have not seen before, block the rest
                    boolean notSeeBefore = packagesSeenBefore.add(packageName);
                    if (notSeeBefore) {
                        canonicalPackageInfos.add(file.getAbsoluteFile());

We can do better...

## What makes a dependency { #what-makes-a-dependency }

Up to now you have seen dependencies declared as functions.

But that's not the only way to declare dependencies (although it would probably be the more common).

The key factor is that a dependency should be a "callable".

{* ../../docs_src/path_operation_advanced_configuration/tutorial004_py310.py hl[17:27] *}

## Additional Responses { #additional-responses }

You probably have seen how to declare the `response_model` and `status_code` for a *path operation*.

That defines the metadata about the main response of a *path operation*.