Ve parametreleri, herhangi bir sıraya koymanıza da gerek yoktur.

İsimlerine göre belirleneceklerdir:

{* ../../docs_src/query_params/tutorial004_py310.py hl[6,8] *}

## Zorunlu Sorgu Parametreleri

Türü yol olmayan bir parametre (şu ana kadar sadece sorgu parametrelerini gördük) için varsayılan değer tanımlarsanız o parametre zorunlu olmayacaktır.

{* ../../docs_src/body/tutorial003_py310.py hl[15:16] *}

## Request body + path + parámetros de query { #request-body-path-query-parameters }

También puedes declarar parámetros de **body**, **path** y **query**, todos al mismo tiempo.

**FastAPI** reconocerá cada uno de ellos y tomará los datos del lugar correcto.

{* ../../docs_src/body/tutorial004_py310.py hl[16] *}

import shutil

import pytest
from fastapi.testclient import TestClient

from tests.utils import needs_py310


@pytest.fixture(
    name="client",
    params=[
        pytest.param("tutorial004_py39"),
        pytest.param("tutorial004_py310", marks=needs_py310),
    ],
)
def get_client(request: pytest.FixtureRequest):
    mod = importlib.import_module(f"docs_src.additional_responses.{request.param}")

import importlib

import pytest
from fastapi.testclient import TestClient

from ...utils import needs_py310


@pytest.fixture(
    name="client",
    params=[
        pytest.param("tutorial004_py39"),
        pytest.param("tutorial004_py310", marks=needs_py310),
        pytest.param("tutorial004_an_py39"),
        pytest.param("tutorial004_an_py310", marks=needs_py310),
    ],
)
def get_client(request: pytest.FixtureRequest):

import importlib

import pytest
from fastapi.testclient import TestClient

from ...utils import needs_py310


@pytest.fixture(
    name="client",
    params=[
        pytest.param("tutorial004_py39"),
        pytest.param("tutorial004_py310", marks=needs_py310),
    ],
)
def get_client(request: pytest.FixtureRequest):
    mod = importlib.import_module(f"docs_src.body.{request.param}")

    client = TestClient(mod.app)

from dirty_equals import IsList
from fastapi.testclient import TestClient

from ...utils import needs_py310


@pytest.fixture(
    name="client",
    params=[
        pytest.param("tutorial004_py39"),
        pytest.param("tutorial004_py310", marks=needs_py310),
    ],
)
def get_client(request: pytest.FixtureRequest):
    mod = importlib.import_module(f"docs_src.body_nested_models.{request.param}")

{* ../../docs_src/response_model/tutorial003_py310.py hl[9,11,16] *}

Aquí, aunque nuestra *path operation function* está devolviendo el mismo usuario de entrada que contiene la contraseña:

{* ../../docs_src/response_model/tutorial003_py310.py hl[24] *}

...hemos declarado el `response_model` para ser nuestro modelo `UserOut`, que no incluye la contraseña:

{* ../../docs_src/body/tutorial003_py310.py hl[15:16] *}


## Requestbody- + Pfad- + Query-Parameter { #request-body-path-query-parameters }

Sie können auch zur gleichen Zeit **Body-**, **Pfad-** und **Query-Parameter** deklarieren.

**FastAPI** wird jeden von ihnen korrekt erkennen und die Daten vom richtigen Ort holen.

{* ../../docs_src/body/tutorial004_py310.py hl[16] *}

///

## 导入 Pydantic 的 `BaseModel`

从 `pydantic` 中导入 `BaseModel`：

{* ../../docs_src/body/tutorial001_py310.py hl[2] *}

## 创建数据模型

把数据模型声明为继承 `BaseModel` 的类。

使用 Python 标准类型声明所有属性：

{* ../../docs_src/body/tutorial001_py310.py hl[5:9] *}

与声明查询参数一样，包含默认值的模型属性是可选的，否则就是必选的。默认值为 `None` 的模型属性也是可选的。

例如，上述模型声明如下 JSON **对象**（即 Python **字典**）：

```JSON
{

import importlib

import pytest
from fastapi.testclient import TestClient

from ...utils import needs_py310


@pytest.fixture(
    name="client",
    params=[
        pytest.param("tutorial004_py39"),
        pytest.param("tutorial004_py310", marks=needs_py310),
    ],
)
def get_client(request: pytest.FixtureRequest):
    mod = importlib.import_module(f"docs_src.query_params.{request.param}")

    client = TestClient(mod.app)