"content": {"application/json": {"schema": {}}},
                            },
                            "422": {
                                "description": "Validation Error",
                                "content": {
                                    "application/json": {
                                        "schema": {

from fastapi.openapi.models import Schema, SchemaType


@pytest.mark.parametrize(
    "type_value",
    [
        "array",
        ["string", "null"],
        None,
    ],
)
def test_allowed_schema_type(
    type_value: SchemaType | list[SchemaType] | None,
) -> None:
    """Test that Schema accepts SchemaType, List[SchemaType] and None for type field."""
    schema = Schema(type=type_value)
    assert schema.type == type_value

### Générer le schéma OpenAPI { #generate-the-openapi-schema }

Ensuite, utilisez la même fonction utilitaire pour générer le schéma OpenAPI, dans une fonction `custom_openapi()` :

{* ../../docs_src/extending_openapi/tutorial001_py310.py hl[2,15:21] *}

### Modifier le schéma OpenAPI { #modify-the-openapi-schema }

### Das OpenAPI-Schema generieren { #generate-the-openapi-schema }

Verwenden Sie dann dieselbe Hilfsfunktion, um das OpenAPI-Schema innerhalb einer `custom_openapi()`-Funktion zu generieren:

{* ../../docs_src/extending_openapi/tutorial001_py310.py hl[2,15:21] *}

### Das OpenAPI-Schema ändern { #modify-the-openapi-schema }

                                "content": {"application/json": {"schema": {}}},
                            },
                            "422": {
                                "description": "Validation Error",
                                "content": {
                                    "application/json": {
                                        "schema": {

///

{* ../../docs_src/separate_openapi_schemas/tutorial002_py310.py hl[10] *}

### Utiliser le même schéma pour les modèles d'entrée et de sortie dans les documents { #same-schema-for-input-and-output-models-in-docs }

Désormais, il n'y aura qu'un seul schéma pour l'entrée et la sortie du modèle, uniquement `Item`, et `description` ne sera pas requis :

<div class="screenshot">

                        "responses": {
                            "200": {
                                "description": "Successful Response",
                                "content": {"application/json": {"schema": {}}},
                            }
                        },
                    }
                },
                "/no_response_model-no_annotation-return_dict": {
                    "get": {

                                "content": {"application/json": {"schema": {}}},
                            },
                            "422": {
                                "description": "Validation Error",
                                "content": {
                                    "application/json": {
                                        "schema": {

                                "content": {"application/json": {"schema": {}}},
                            },
                            "500": {
                                "description": "Internal Server Error",
                                "content": {
                                    "application/json": {
                                        "schema": {

                                "content": {"application/json": {"schema": {}}},
                            },
                            "422": {
                                "description": "Validation Error",
                                "content": {
                                    "application/json": {
                                        "schema": {