Wenn Sie beispielsweise einen Parameter vom Typ `Hero` deklarieren, wird er aus dem **JSON-Body** gelesen.

Auf die gleiche Weise können Sie es als **Rückgabetyp** der Funktion deklarieren, und dann wird die Form der Daten in der automatischen API-Dokumentation angezeigt.

/// tip | Dica

Aqui estamos usando `Query()` porque este é um **parâmetro de consulta**. Mais adiante veremos outros como `Path()`, `Body()`, `Header()` e `Cookie()`, que também aceitam os mesmos argumentos que `Query()`.

///

Agora o FastAPI vai:

* **Validar** os dados garantindo que o comprimento máximo seja de 50 caracteres

		writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrReplicationNeedsVersioningError), r.URL)
		return
	}
	replicationConfig, err := replication.ParseConfig(io.LimitReader(r.Body, r.ContentLength))
	if err != nil {
		apiErr := errorCodes.ToAPIErr(ErrMalformedXML)
		apiErr.Description = err.Error()
		writeErrorResponse(ctx, w, apiErr, r.URL)
		return
	}

		for _, key := range trailers {
			req.Trailer.Add(key, "")
		}
	} else {
		req.Trailer = nil
	}
	return &s3ChunkedReader{
		trailers:          req.Trailer,
		reader:            bufio.NewReader(req.Body),
		cred:              cred,
		seedSignature:     seedSignature,
		seedDate:          seedDate,
		region:            region,
		chunkSHA256Writer: sha256.New(),
		buffer:            make([]byte, 64*1024),

	}
	testValidHeader(&h, t)
}

// Issue 4393. It is valid to have an extra data header
// which contains no body.
func TestZeroLengthHeader(t *testing.T) {
	h := FileHeader{
		Name:   "extadata.txt",
		Method: Deflate,
		Extra: []byte{
			85, 84, 5, 0, 3, 154, 144, 195, 77, // tag 21589 size 5

/// note

Notice that `response_model` is a parameter of the "decorator" method (`get`, `post`, etc). Not of your *path operation function*, like all the parameters and body.

///

`response_model` receives the same type you would declare for a Pydantic model field, so, it can be a Pydantic model, but it can also be, e.g. a `list` of Pydantic models, like `List[Item]`.

		Locale string `gorm:"primary_key"`
		Value  string
	}

	type Blog struct {
		ID         uint   `gorm:"primary_key"`
		Locale     string `gorm:"primary_key"`
		Subject    string
		Body       string
		Tags       []Tag `gorm:"many2many:blog_tags;"`
		SharedTags []Tag `gorm:"many2many:shared_blog_tags;ForeignKey:id;References:id"`

type IncompleteBody GenericError

// Error returns string an error formatted as the given text.
func (e IncompleteBody) Error() string {
	return e.Bucket + "/" + e.Object + " has incomplete body"
}

// InvalidRange - invalid range typed error.
type InvalidRange struct {
	OffsetBegin  int64
	OffsetEnd    int64
	ResourceSize int64
}

func (e InvalidRange) Error() string {

![ReDoc](https://fastapi.tiangolo.com/img/index/index-02-redoc-simple.png)

## Örneği Güncelleyelim

Şimdi `main.py` dosyasını, `PUT` isteğiyle birlikte bir gövde alacak şekilde değiştirelim.

<abbr title="Gövde: Body">Gövde</abbr>yi Pydantic sayesinde standart python tiplerini kullanarak tanımlayalım.

```Python hl_lines="4  9-12  25-27"
from typing import Union

from fastapi import FastAPI
from pydantic import BaseModel

channel.queue_bind(exchange='bucketevents',
                   queue=queue_name)

print(' [*] Waiting for logs. To exit press CTRL+C')

def callback(ch, method, properties, body):
    print(" [x] %r" % body)

channel.basic_consume(callback,
                      queue=queue_name,
                      no_ack=False)

channel.start_consuming()
```