```

</div>

Então, vá para a interface `/docs`, você verá que o **FastAPI** está usando esses **modelos** para **documentar** a API, e ele também os usará para **serializar** e **validar** os dados.

<div class="screenshot">
<img src="/img/tutorial/sql-databases/image01.png">
</div>

## Atualizar o App com Múltiplos Modelos

        SimpleProblemCollector result = validate("invalid-coordinate-ids-pom.xml");

        assertViolations(result, 0, 2, 0);

        assertEquals(
                "'groupId' with value 'o/a/m' does not match a valid coordinate id pattern.",
                result.getErrors().get(0));

        assertEquals(
                "'artifactId' with value 'm$-do$' does not match a valid coordinate id pattern.",

        SimpleProblemCollector problems = new SimpleProblemCollector();
        validator.validate(model, problems);
        assertEquals(0, problems.messages.size());

        Repository repo = new Repository(org.apache.maven.api.settings.Repository.newInstance(false));
        prof.addRepository(repo);
        problems = new SimpleProblemCollector();
        validator.validate(model, problems);
        assertEquals(2, problems.messages.size());

    }

    @Override
    public void validate(Settings settings, SettingsProblemCollector problems) {
        validate(settings, false, problems);
    }

    @Override
    public void validate(Settings settings, boolean isProjectSettings, SettingsProblemCollector problems) {
        List<BuilderProblem> list = settingsBuilder.validate(settings.getDelegate(), isProjectSettings);

/**
 * Validate a model settings
 *
 * @deprecated since 4.0.0, use {@link org.apache.maven.internal.impl.DefaultSettingsValidator} instead
 */
@Deprecated(since = "4.0.0")
public interface SettingsValidator {

    /**
     * Validate the specified settings.
     *
     * @param settings The settings to validate, must not be {@code null}.

permissions:
  contents: read

jobs:
  validate:
    if: github.repository == 'tensorflow/tensorflow' # Don't do this in forks
    name: "validate"
    runs-on: ubuntu-latest
    steps:
      - name: Check out a copy of the repository
        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2

      - name: Check whether the citation metadata from CITATION.cff is valid

     * file and has not been subjected to inheritance, interpolation or profile/default injection.
     *
     * @param model The model to validate, must not be {@code null}.
     * @param request The model building request that holds further settings, must not be {@code null}.

* **Définir les prérequis** : depuis les paramètres de chemins des requêtes, les entêtes, les corps, les dépendances, etc.
* **Convertir des données** : depuis la requête vers les types requis.
* **Valider des données** : venant de chaque requête :
    * Générant automatiquement des **erreurs** renvoyées au client quand la donnée est invalide.
* **Documenter** l'API avec OpenAPI :

    }

    @Test
    void populatePropertiesCanContainEqualsSign() throws Exception {
        // Arrange
        CliRequest request = new CliRequest(new String[] {"-Dw=x=y", "validate"}, null);

        // Act
        cli.cli(request);
        cli.properties(request);

        // Assert
        assertThat(request.getUserProperties().getProperty("w"), is("x=y"));
    }

    * Swagger UI.
    * ReDoc.

---

Coming back to the previous code example, **FastAPI** will:

* Validate that there is an `item_id` in the path for `GET` and `PUT` requests.
* Validate that the `item_id` is of type `int` for `GET` and `PUT` requests.
    * If it is not, the client will see a useful, clear error.