# Body - Paramètres multiples

Maintenant que nous avons vu comment manipuler `Path` et `Query`, voyons comment faire pour le corps d'une requête, communément désigné par le terme anglais "body".

## Mélanger les paramètres `Path`, `Query` et body

Tout d'abord, sachez que vous pouvez mélanger les déclarations des paramètres `Path`, `Query` et body, **FastAPI** saura quoi faire.

import os
from pathlib import Path

from fastapi.testclient import TestClient

from docs_src.background_tasks.tutorial001_py39 import app

client = TestClient(app)


def test():
    log = Path("log.txt")
    if log.is_file():
        os.remove(log)  # pragma: no cover
    response = client.post("/send-notification/******@****.***")
    assert response.status_code == 200, response.text

{* ../../docs_src/dependencies/tutorial001_an_py310.py hl[8:9] *}

Eso es todo.

**2 líneas**.

Y tiene la misma forma y estructura que todas tus *path operation functions*.

Puedes pensar en ella como una *path operation function* sin el "decorador" (sin el `@app.get("/some-path")`).

Y puede devolver lo que quieras.

        /**
         * Constructs a complete FTP URL using the host and port from this FtpInfo
         * and the specified path.
         *
         * @param path The path to append to the URL
         * @return The complete FTP URL
         */
        public String toUrl(final String path) {
            final StringBuilder buf = new StringBuilder(100);
            buf.append("ftp://");
            buf.append(getHost());

from typing import Any


def get_body_model_name(openapi: dict[str, Any], path: str) -> str:
    body = openapi["paths"][path]["post"]["requestBody"]
    body_schema = body["content"]["multipart/form-data"]["schema"]

    route: APIRoute = request.scope["route"]
    return {"user_id": user_id, "path": route.path}


@app.websocket("/items/{item_id}")
async def websocket_item(item_id: str, websocket: WebSocket):
    route: APIWebSocketRoute = websocket.scope["route"]
    await websocket.accept()
    await websocket.send_json({"item_id": item_id, "path": route.path})


client = TestClient(app)


def test_get():

        void shouldNotOverwriteExistingMvnDirectory() throws Exception {
            Path projectDir = tempDir.resolve("project");
            Files.createDirectories(projectDir);

            Path mvnDir = projectDir.resolve(".mvn");
            Files.createDirectories(mvnDir);
            Path existingFile = mvnDir.resolve("existing.txt");
            Files.writeString(existingFile, "existing content");

from typing import Annotated

from fastapi import FastAPI, Path
from pydantic import BaseModel

app = FastAPI()


class Item(BaseModel):
    name: str
    description: str | None = None
    price: float
    tax: float | None = None


@app.put("/items/{item_id}")
async def update_item(
    item_id: Annotated[int, Path(title="The ID of the item to get", ge=0, le=1000)],
    q: str | None = None,
    item: Item | None = None,

# Body - Campos { #body-fields }

De la misma manera que puedes declarar validaciones adicionales y metadatos en los parámetros de las *path operation function* con `Query`, `Path` y `Body`, puedes declarar validaciones y metadatos dentro de los modelos de Pydantic usando `Field` de Pydantic.

## Importar `Field` { #import-field }

Primero, tienes que importarlo:

{* ../../docs_src/body_fields/tutorial001_an_py310.py hl[4] *}

/// warning | Advertencia

 * password, and domain. Additionally, it offers a method to construct a path
 * prefix for SMB1 URLs based on the configured server and port.
 * </p>
 *
 * <p>
 * The path prefix is in the format "smb1://server:port/", where the port is
 * included only if it's greater than 0. If the server is not set, the path
 * prefix will be "smb1://".
 * </p>
 */
public class SmbAuthentication {