private final Equivalence<T> equivalence;
    private final @Nullable T target;

    EquivalentToPredicate(Equivalence<T> equivalence, @Nullable T target) {
      this.equivalence = checkNotNull(equivalence);
      this.target = target;
    }

    @Override
    public boolean apply(@Nullable T input) {
      return equivalence.equivalent(input, target);
    }

    @Override

🖼, 🚥 👆 ✊ 🎭, 👆 💪 ❎ &amp; ⚙️ <a href="https://github.com/ijl/orjson" class="external-link" target="_blank">`orjson`</a> &amp; ⚒ 📨 `ORJSONResponse`.

🗄 `Response` 🎓 (🎧-🎓) 👆 💚 ⚙️ &amp; 📣 ⚫️ *➡ 🛠️ 👨‍🎨*.

⭕ 📨, 📨 `Response` 🔗 🌅 ⏩ 🌘 🛬 📖.

👉 ↩️ 🔢, FastAPI 🔜 ✔ 🔠 🏬 🔘 &amp; ⚒ 💭 ⚫️ 🎻 ⏮️ 🎻, ⚙️ 🎏 [🎻 🔗 🔢](../tutorial/encoder.md){.internal-link target=_blank} 🔬 🔰. 👉 ⚫️❔ ✔ 👆 📨 **❌ 🎚**, 🖼 💽 🏷.

В этом разделе мы продемонстрируем, как работать с <a href="https://sqlmodel.tiangolo.com/" class="external-link" target="_blank">SQLModel</a>.

Библиотека **SQLModel** построена на основе <a href="https://www.sqlalchemy.org/" class="external-link" target="_blank">SQLAlchemy</a> и Pydantic. Она была разработана автором **FastAPI** специально для приложений на основе FastAPI, которые используют **реляционные базы данных**.

# Development - Contributing

First, you might want to see the basic ways to [help FastAPI and get help](help-fastapi.md){.internal-link target=_blank}.

## Developing

If you already cloned the <a href="https://github.com/fastapi/fastapi" class="external-link" target="_blank">fastapi repository</a> and you want to deep dive in the code, here are some guidelines to set up your environment.

### Virtual environment

    public boolean contains(@Nullable Object target) {
      return indexOf(target) >= 0;
    }

    @Override
    public int indexOf(@Nullable Object target) {
      return target instanceof Long ? parent.indexOf((Long) target) : -1;
    }

    @Override
    public int lastIndexOf(@Nullable Object target) {
      return target instanceof Long ? parent.lastIndexOf((Long) target) : -1;
    }

    @Override

    @Override
    public boolean contains(@Nullable Object target) {
      return indexOf(target) >= 0;
    }

    @Override
    public int indexOf(@Nullable Object target) {
      return target instanceof Integer ? parent.indexOf((Integer) target) : -1;
    }

    @Override
    public int lastIndexOf(@Nullable Object target) {
      return target instanceof Integer ? parent.lastIndexOf((Integer) target) : -1;
    }

    }

    // Test annotation target elements
    public void test_annotationTargetElements() {
        CronExpression.class.isAnnotation();
        assertTrue(CronExpression.class.isAnnotation());

        // Check that annotation can be applied to METHOD, FIELD, ANNOTATION_TYPE, CONSTRUCTOR, PARAMETER
        java.lang.annotation.Target target = CronExpression.class.getAnnotation(java.lang.annotation.Target.class);

As capturas de tela anteriores foram capturas no <a href="https://code.visualstudio.com" class="external-link" target="_blank">Visual Studio Code</a>.

Mas você terá o mesmo suporte do editor no <a href="https://www.jetbrains.com/pycharm/" class="external-link" target="_blank">PyCharm</a> e na maioria dos editores Python:

<img src="/img/tutorial/body/image05.png">

/// tip | Dica

    @Inject
    private ArtifactRepositoryFactory artifactRepositoryFactory;

    @Test
    void testUnnecessaryRepositoryLookup() throws Exception {
        Artifact artifact = createTestPomArtifact("target/test-data/get-missing-pom");

        List<ArtifactRepository> repos = new ArrayList<>();
        repos.add(artifactRepositoryFactory.createArtifactRepository(

Open your browser at <a href="http://127.0.0.1:8000" class="external-link" target="_blank">http://127.0.0.1:8000</a>.

You will see the JSON response as:

```JSON
{"message": "Hello World"}
```

### Interactive API docs { #interactive-api-docs }

Now go to <a href="http://127.0.0.1:8000/docs" class="external-link" target="_blank">http://127.0.0.1:8000/docs</a>.