response = client.post("/tuple-of-models/", json=data)
    assert response.status_code == 422, response.text

    data = [{"x": 1, "y": 2}]
    response = client.post("/tuple-of-models/", json=data)
    assert response.status_code == 422, response.text


def test_tuple_form_valid():
    response = client.post("/tuple-form/", data={"values": ("1", "2")})

Quando você cria uma *operação de rota* no **FastAPI**, normalmente você pode retornar qualquer dado: um `dict`, uma `list`, um modelo do Pydantic, um modelo do banco de dados, etc.

Se você declarar um [Modelo de resposta](../tutorial/response-model.md), o FastAPI irá usá-lo para serializar os dados para JSON, usando o Pydantic.

package gorm

import "time"

// Model a basic GoLang struct which includes the following fields: ID, CreatedAt, UpdatedAt, DeletedAt
// It may be embedded into your model or you may build your own model without it
//
//	type User struct {
//	  gorm.Model
//	}
type Model struct {
	ID        uint `gorm:"primarykey"`
	CreatedAt time.Time
	UpdatedAt time.Time
	DeletedAt DeletedAt `gorm:"index"`

### Model for Input { #model-for-input }

If you use this model as an input like here:

{* ../../docs_src/separate_openapi_schemas/tutorial001_py310.py ln[1:15] hl[14] *}

...then the `description` field will **not be required**. Because it has a default value of `None`.

### Input Model in Docs { #input-model-in-docs }

          <execution>
            <id>modello-v3</id>
            <goals>
              <goal>velocity</goal>
            </goals>
            <configuration>
              <version>1.1.0</version>
              <models>
                <model>../../api/maven-api-metadata/src/main/mdo/metadata.mdo</model>
              </models>
              <templates>
                <template>model-v3.vm</template>
              </templates>

</div>

### Modell für die Ausgabe { #model-for-output }

Wenn Sie jedoch dasselbe Modell als Ausgabe verwenden, wie hier:

{* ../../docs_src/separate_openapi_schemas/tutorial001_py310.py hl[19] *}

... dann, weil `description` einen Defaultwert hat, wird es, wenn Sie für dieses Feld **nichts zurückgeben**, immer noch diesen **Defaultwert** haben.

Usa base64 solo si definitivamente necesitas incluir datos binarios en JSON y no puedes usar archivos para eso.

## Pydantic `bytes` { #pydantic-bytes }

Puedes declarar un modelo de Pydantic con campos `bytes`, y luego usar `val_json_bytes` en la configuración del modelo para indicarle que use base64 para validar datos JSON de entrada; como parte de esa validación decodificará el string base64 en bytes.

Si vous déclarez un [Modèle de réponse](../tutorial/response-model.md), FastAPI l'utilise pour sérialiser les données en JSON, en utilisant Pydantic.

    <version>11-SNAPSHOT</version>
  </parent>

  <artifactId>child-artifact-id</artifactId>
  <name>Model inheritance test parent: module directory != artifactId</name>
  <description>
    artifactId == "child-artifact-id"
    but expect path on SCM and site == "child"
    feature: support "project.directory" property, ressembling future model addition of "directory" element along "artifactId"
  </description>

  <properties>

## Pydantic `bytes` { #pydantic-bytes }

Vous pouvez déclarer un modèle Pydantic avec des champs `bytes`, puis utiliser `val_json_bytes` dans la configuration du modèle pour lui indiquer d'utiliser base64 pour valider les données JSON en entrée ; dans le cadre de cette validation, il décodera la chaîne base64 en octets.