Et les données seraient enregistrées avec cette « nouvelle » « tax » de 10.5.

## Effectuer des mises à jour partielles avec `PATCH` { #partial-updates-with-patch }

Vous pouvez également utiliser l’opération [HTTP `PATCH`](https://developer.mozilla.org/en-US/docs/Web/HTTP/Methods/PATCH) pour mettre à jour des données de manière partielle.

Cela signifie que vous pouvez n’envoyer que les données que vous souhaitez mettre à jour, en laissant le reste intact.

And the data would be saved with that "new" `tax` of `10.5`.

## Partial updates with `PATCH` { #partial-updates-with-patch }

You can also use the [HTTP `PATCH`](https://developer.mozilla.org/en-US/docs/Web/HTTP/Methods/PATCH) operation to *partially* update data.

This means that you can send only the data that you want to update, leaving the rest intact.

/// note

Vous pouvez utiliser [`bump-pydantic`](https://github.com/pydantic/bump-pydantic) de la même équipe Pydantic.

Cet outil vous aidera à modifier automatiquement la majeure partie du code à adapter.

@pytest.mark.parametrize(
    "route,value",
    [
        ("/partial-function-dependency", "partial-function-dependency"),
        (
            "/partial-async-function-dependency",
            "partial-async-function-dependency",
        ),
        ("/partial-gen-dependency", "partial-gen-dependency"),
        ("/partial-async-gen-dependency", "partial-async-gen-dependency"),
        ("/partial-callable-dependency", "partial-callable-dependency"),

Cela signifie :

* La variable `prices` est un `dict` :
    * Les clés de ce `dict` sont de type `str` (disons, le nom de chaque article).
    * Les valeurs de ce `dict` sont de type `float` (disons, le prix de chaque article).

#### Union { #union }

Vous pouvez déclarer qu'une variable peut être **plusieurs types**, par exemple, un `int` ou un `str`.

from functools import partial

from fastapi import FastAPI
from fastapi.testclient import TestClient


def main(some_arg, q: str | None = None):
    return {"some_arg": some_arg, "q": q}


endpoint = partial(main, "foo")

app = FastAPI()

app.get("/")(endpoint)


client = TestClient(app)


def test_partial():
    response = client.get("/?q=bar")
    data = response.json()

zaten kayıtlı olan `"tax": 20.2` alanını içermediği için, input model `"tax": 10.5` varsayılan değerini kullanacaktır.

Ve veri, bu "yeni" `tax` değeri olan `10.5` ile kaydedilecektir.

## `PATCH` ile kısmi güncellemeler { #partial-updates-with-patch }

Veriyi *kısmen* güncellemek için [HTTP `PATCH`](https://developer.mozilla.org/en-US/docs/Web/HTTP/Methods/PATCH) operasyonunu da kullanabilirsiniz.

   *
   * <p>The recommended solution for finding the {@code minimum} of some values depends on the type
   * of your data and the number of elements you have. Read more in the Guava User Guide article on
   * <a href="https://github.com/google/guava/wiki/CollectionUtilitiesExplained#comparators">{@code
   * Comparators}</a>.
   *
   * @param a first value to compare, returned if less than or equal to b.

   *
   * <p>The recommended solution for finding the {@code minimum} of some values depends on the type
   * of your data and the number of elements you have. Read more in the Guava User Guide article on
   * <a href="https://github.com/google/guava/wiki/CollectionUtilitiesExplained#comparators">{@code
   * Comparators}</a>.
   *
   * @param a first value to compare, returned if less than or equal to b.

поскольку оно не включает уже сохраненный атрибут `"tax": 20.2`, входная модель примет значение по умолчанию `"tax": 10.5`.

И данные будут сохранены с этим «новым» `tax`, равным `10.5`.

## Частичное обновление с помощью `PATCH` { #partial-updates-with-patch }

Также можно использовать операцию [HTTP `PATCH`](https://developer.mozilla.org/en-US/docs/Web/HTTP/Methods/PATCH) для частичного обновления данных.