### Use o parâmetro `response_model_exclude_unset` { #use-the-response-model-exclude-unset-parameter }

Você pode definir o parâmetro `response_model_exclude_unset=True` do *decorador de operação de rota*:

{* ../../docs_src/response_model/tutorial004_py310.py hl[22] *}

    @Secured({ ROLE, ROLE + VIEW })
    public HtmlResponse search(final SearchForm form) {
        validate(form, messages -> {}, this::asDictIndexHtml);
        copyBeanToBean(form, stemmerOverridePager, op -> op.exclude(Constants.PAGER_CONVERSION_RULE));
        return asHtml(path_AdminDictStemmeroverride_AdminDictStemmeroverrideJsp).renderWith(data -> {
            searchPaging(data, form);
        });
    }

    /**

        assertNull(ex.getCause(), "No cause expected when only message is provided");

        // toString behavior mirrors Throwable: includes message when not null
        String ts = ex.toString();
        assertTrue(ts.contains("SmbUnsupportedOperationException"), "toString should contain class name");
        if (msg != null) {

## "AS IS" BASIS, 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.
##


Apache Maven includes a number of components and libraries with separate
copyright notices and license terms. Your use of those components are
subject to the terms and conditions of the following licenses:
##

     */
    protected EditBody createEditBody(final WebConfig entity) {
        final EditBody body = new EditBody();
        copyBeanToBean(entity, body, copyOp -> {
            copyOp.excludeNull();
            copyOp.exclude(Constants.PERMISSIONS, Constants.VIRTUAL_HOSTS);
        });
        final PermissionHelper permissionHelper = ComponentUtil.getPermissionHelper();

        assertEquals(3, dispatched.size());
        assertEquals(1, unresolved.size());
        assertEquals(8, classes.size()); // "plexus.pom" and "junit.jar" are excluded.
        assertEquals(1, modules.size());
        assertEquals("plexus-1.0.11.pom", unresolved.get(0).getFileName().toString());
        assertEquals("test-extension-1.jar", classes.get(0).getFileName().toString());

    StringBuilder sb = new StringBuilder();
    Random random = new Random(0xdeadbeef); // for unpredictable but reproducible behavior
    sb.ensureCapacity(size);
    for (int k = 0; k < size; k++) {
      // [9-127) includes all ascii non-control characters
      sb.append((char) (random.nextInt(127 - 9) + 9));
    }
    data = sb.toString();
  }

  @Benchmark
  public long timeCopy(int reps) throws IOException {
    long r = 0;

This is due to Java's use of reflection and the need to maintain a lot of metadata.

- **Size of Serialized Data:**
Java serialization tends to produce larger serialized objects because it includes class metadata and other overhead.

- **Flexibility and Control:**

 * and processing them according to specific rules. The main functionality is encapsulated
 * within the nested {@link TextNormalizeContext} class.
 *
 * <p>The text normalization process includes:
 * <ul>
 *   <li>Treating ISO control characters and specified space characters as spaces.</li>
 *   <li>Appending alphanumeric characters (0-9, A-Z, a-z) to the buffer.</li>

Different versions of **FastAPI** will use a specific newer version of Starlette.

So, you can just let **FastAPI** use the correct Starlette version.

## About Pydantic { #about-pydantic }

Pydantic includes the tests for **FastAPI** with its own tests, so new versions of Pydantic (above `1.0.0`) are always compatible with FastAPI.

You can pin Pydantic to any version above `1.0.0` that works for you.

For example:

```txt