},
                                ],
                                "title": "Item-Query",
                            },
                            "name": "item-query",
                            "in": "query",
                        },
                    ],
                    "responses": {
                        "200": {

    * Depende del `query_extractor`, y asigna el valor que devuelve al parámetro `q`.
* También declara una `last_query` cookie opcional, como un `str`.
    * Si el usuario no proporcionó ningún query `q`, usamos el último query utilizado, que guardamos previamente en una cookie.

## Usa la dependencia { #use-the-dependency }

Entonces podemos usar la dependencia con:

{* ../../docs_src/dependencies/tutorial005_an_py310.py hl[23] *}

## Імпорт `Field`

Спочатку вам потрібно імпортувати це:

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

/// warning

Зверніть увагу, що `Field` імпортується прямо з `pydantic`, а не з `fastapi`, як всі інші (`Query`, `Path`, `Body` тощо).

///

):
    await websocket.accept()
    while True:
        data = await websocket.receive_text()
        await websocket.send_text(
            f"Session cookie or query token value is: {cookie_or_token}"
        )
        if q is not None:
            await websocket.send_text(f"Query parameter q is: {q}")

def test_query_params_str_validations_q_query(client: TestClient):
    response = client.get("/items/", params={"q": "query"})
    assert response.status_code == 200
    assert response.json() == {
        "items": [{"item_id": "Foo"}, {"item_id": "Bar"}],
        "q": "query",
    }


def test_query_params_str_validations_q_too_long(client: TestClient):
    response = client.get("/items/", params={"q": "q" * 51})

                    "type": "less_than_equal",
                    "loc": ["query", "limit"],
                    "msg": "Input should be less than or equal to 100",
                    "input": "150",
                    "ctx": {"le": 100},
                },
                {
                    "type": "greater_than_equal",
                    "loc": ["query", "offset"],
                    "msg": "Input should be greater than or equal to 0",

def test_query_params_str_validations_q_query(client: TestClient):
    response = client.get("/items/", params={"q": "query"})
    assert response.status_code == 200
    assert response.json() == {
        "items": [{"item_id": "Foo"}, {"item_id": "Bar"}],
        "q": "query",
    }


def test_openapi_schema(client: TestClient):
    response = client.get("/openapi.json")

from typing import Optional

import pytest
from fastapi import FastAPI, Query
from pydantic import BaseModel


def test_invalid_sequence():
    with pytest.raises(AssertionError):
        app = FastAPI()

        class Item(BaseModel):
            title: str

        @app.get("/items/")
        def read_items(q: list[Item] = Query(default=None)):
            pass  # pragma: no cover


def test_invalid_tuple():

    response = client.get("/items/")
    assert response.status_code == 422
    assert response.json() == {
        "detail": [
            {
                "type": "missing",
                "loc": ["query", "q"],
                "msg": "Field required",
                "input": None,
            }
        ]
    }


def test_query_params_str_validations_q_fixedquery(client: TestClient):

///

## Declare atributos do modelo { #declare-model-attributes }

Você pode então utilizar `Field` com atributos do modelo:

{* ../../docs_src/body_fields/tutorial001_an_py310.py hl[11:14] *}

`Field` funciona da mesma forma que `Query`, `Path` e `Body`, ele possui todos os mesmos parâmetros, etc.

/// note | Detalhes Técnicos