assert response.status_code == 200
    assert response.json() == "foo bar"


def test_query_int_optional_query_50():
    response = client.get("/query/int/optional?query=50")
    assert response.status_code == 200
    assert response.json() == "foo bar 50"


def test_query_int_optional_query_foo():
    response = client.get("/query/int/optional?query=foo")
    assert response.status_code == 422

from fastapi import FastAPI, Query

app = FastAPI()


@app.get("/items/")
async def read_items(q: str | None = Query(default=None, min_length=3, max_length=50)):
    results = {"items": [{"item_id": "Foo"}, {"item_id": "Bar"}]}
    if q:
        results.update({"q": q})

                                        {
                                            "type": "string",
                                            "minLength": 3,
                                            "maxLength": 50,
                                            "pattern": "^fixedquery$",
                                        },
                                        {"type": "null"},
                                    ],

from typing import Union

from fastapi import FastAPI, Query

app = FastAPI()


@app.get("/items/")
async def read_items(
    q: Union[str, None] = Query(default=None, min_length=3, max_length=50),
):
    results = {"items": [{"item_id": "Foo"}, {"item_id": "Bar"}]}
    if q:
        results.update({"q": q})

from typing import Annotated

from fastapi import FastAPI, Query

app = FastAPI()


@app.get("/items/")
async def read_items(
    q: Annotated[str | None, Query(min_length=3, max_length=50)] = None,
):
    results = {"items": [{"item_id": "Foo"}, {"item_id": "Bar"}]}
    if q:
        results.update({"q": q})

from fastapi import FastAPI, Query
from typing_extensions import Annotated

app = FastAPI()


@app.get("/items/")
async def read_items(
    q: Annotated[Union[str, None], Query(min_length=3, max_length=50)] = None,
):
    results = {"items": [{"item_id": "Foo"}, {"item_id": "Bar"}]}
    if q:
        results.update({"q": q})

Onlar bir çox insanlara kömək edərək mütəxəssis olduqlarını sübut ediblər. ✨

{% if people %}
<div class="user-list user-list-center">
{% for user in people.experts[:50] %}

Bir çok kullanıcıya yardım ederek uzman olduklarını kanıtladılar! ✨

{% if people %}
<div class="user-list user-list-center">
{% for user in people.experts[:50] %}

        default=None,
        alias="item-query",
        title="Query string",
        description="Query string for the items to search in the database that have a good match",
        min_length=3,
        max_length=50,
        pattern="^fixedquery$",
        deprecated=True,
    ),
):
    results = {"items": [{"item_id": "Foo"}, {"item_id": "Bar"}]}
    if q:
        results.update({"q": q})

## Importer `Query`

Pour cela, importez d'abord `Query` depuis `fastapi` :

```Python hl_lines="3"
{!../../../docs_src/query_params_str_validations/tutorial002.py!}
```

## Utiliser `Query` comme valeur par défaut

Construisez ensuite la valeur par défaut de votre paramètre avec `Query`, en choisissant 50 comme `max_length` :

```Python hl_lines="9"