client ->> dep: Startet den Request
    Note over dep: Führt den Code bis zum yield aus
    opt Löst Exception aus
        dep -->> handler: Löst Exception aus
        handler -->> client: HTTP-Error-Response
    end
    dep ->> operation: Führt Abhängigkeit aus, z. B. DB-Session
    opt Löst aus
        operation -->> dep: Löst Exception aus (z. B. HTTPException)
        opt Handhabt

    client = TestClient(app, raise_server_exceptions=False)
    response = client.get("/items/portal-gun")
    assert response.status_code == 500, response.text

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.app.web.error;

import org.codelibs.fess.app.web.base.FessSearchAction;
import org.lastaflute.web.Execute;
import org.lastaflute.web.response.HtmlResponse;

public class ErrorBadrequrestAction extends FessSearchAction {

import (
	admin "github.com/envoyproxy/go-control-plane/envoy/admin/v3"
)

// GetBootstrapConfigDump retrieves the bootstrap config dump from the ConfigDump
func (w *Wrapper) GetBootstrapConfigDump() (*admin.BootstrapConfigDump, error) {
	bootstrapDumpAny, err := w.getSection(bootstrap)
	if err != nil {
		return nil, err
	}
	bootstrapDump := &admin.BootstrapConfigDump{}
	err = bootstrapDumpAny.UnmarshalTo(bootstrapDump)
	if err != nil {

import (
	admin "github.com/envoyproxy/go-control-plane/envoy/admin/v3"
)

// GetEndpointsConfigDump retrieves the listener config dump from the ConfigDump
func (w *Wrapper) GetEndpointsConfigDump() (*admin.EndpointsConfigDump, error) {
	endpointsDumpAny, err := w.getSection(endpoints)
	if err != nil {
		return nil, nil
	}
	endpointsDump := &admin.EndpointsConfigDump{}
	err = endpointsDumpAny.UnmarshalTo(endpointsDump)
	if err != nil {

   * stream was canceled.
   *
   * This does nothing if [requestBody] and [responseBody] are already closed.
   *
   * For HTTP/2 this sends the [CANCEL](https://datatracker.ietf.org/doc/html/rfc7540#section-7)
   * error code.
   */
  fun cancel()

    /**
     *
     */
    @Serial
    private static final long serialVersionUID = 3652561971360586373L;

    /**
     * @param message the message of the error
     * @param e {@link Exception}
     */
    public ArtifactInstallerException(String message, Exception e) {
        super(message, e);
    }

    }


    /**
     * Closes this output stream and releases any system resources associated
     * with it.
     *
     * @throws IOException
     *             if a network error occurs
     */

    @Override
    public void close () throws IOException {
        try {
            if ( this.handle.isValid() ) {
                this.handle.close();
            }
        }

///

FastAPI will now:

* **Validate** the data making sure that the max length is 50 characters
* Show a **clear error** for the client when the data is not valid
* **Document** the parameter in the OpenAPI schema *path operation* (so it will show up in the **automatic docs UI**)

## Alternative (old): `Query` as the default value

[UnmarshalTypeError.Field] now includes embedded structs to provide more detailed error messages....