* Implementations can specify how long cached data should be retained.
 *
 * @since 4.0.0
 */
@Experimental
public interface CacheMetadata {

    /**
     * Returns the cache retention that should be applied to the associated data.
     *
     * @return The CacheRetention indicating how long data should be retained, or null if
     *         no specific cache retention is defined
     */
    @Nullable

    //                                               Details
    //                                               -------
    /**
     * Displays the details of a specific failure URL record.
     *
     * @param crudMode the CRUD operation mode (should be DETAILS)
     * @param id the ID of the failure URL record to display
     * @return HTML response for the failure URL details page
     */
    @Execute

            status_code=404,
            detail="Item not found",
            headers={"X-Error": "Some custom header"},
        )
    return {"item": items[item_id]}


@app.get("/http-no-body-statuscode-exception")
async def no_body_status_code_exception():
    raise HTTPException(status_code=204)


@app.get("/http-no-body-statuscode-with-detail-exception")
async def no_body_status_code_with_detail_exception():

        public void setTitle(String title) {
            this.title = title;
        }

        public String getDetails() {
            return details;
        }

        public void setDetails(String details) {
            this.details = details;
        }

        public String getImpact() {
            return impact;
        }

        public void setImpact(String impact) {

                    "HTTPValidationError": {
                        "properties": {
                            "detail": {
                                "items": {
                                    "$ref": "#/components/schemas/ValidationError",
                                },
                                "title": "Detail",
                                "type": "array",
                            },
                        },

            form.crudMode = CrudMode.DETAILS;
            return asDetailsHtml();
        }
        form.crudMode = CrudMode.EDIT;
        return asEditHtml();
    }

    // -----------------------------------------------------
    //                                               Details
    //                                               -------
    /**
     * Display details of a specific stopwords entry.
     *

Todo depende de los `scopes` declarados en cada *path operation* y cada dependencia en el árbol de dependencias para esa *path operation* específica.

///

## Más detalles sobre `SecurityScopes` { #more-details-about-securityscopes }

Puedes usar `SecurityScopes` en cualquier punto, y en múltiples lugares, no tiene que ser en la dependencia "raíz".

)
def test_required_str_missing(path: str):
    client = TestClient(app)
    response = client.get(path)
    assert response.status_code == 422
    assert response.json() == {
        "detail": [
            {
                "type": "missing",
                "loc": ["query", "p"],
                "msg": "Field required",
                "input": IsOneOf(None, {}),
            }
        ]
    }

    private Throwable rootCause;

    /**
     * Constructs a new TransportException with no detail message.
     */
    public TransportException() {
    }

    /**
     * Constructs a new TransportException with the specified detail message.
     *
     * @param msg the detail message
     */
    public TransportException(final String msg) {
        super(msg);
    }

    /**

Wenn `openapi_examples` zu `Body()` hinzugefügt wird, würde `/docs` so aussehen:

<img src="/img/tutorial/body-fields/image02.png">

## Technische Details { #technical-details }

/// tip | Tipp

Wenn Sie bereits **FastAPI** Version **0.99.0 oder höher** verwenden, können Sie diese Details wahrscheinlich **überspringen**.

Sie sind für ältere Versionen relevanter, bevor OpenAPI 3.1.0 verfügbar war.