}

    /**
     * Creates a shallow copy of this parameter.
     */
    @Override
    public Parameter clone() {
        try {
            return (Parameter) super.clone();
        } catch (CloneNotSupportedException e) {
            throw new UnsupportedOperationException(e);
        }
    }

    public org.apache.maven.api.plugin.descriptor.Parameter getParameterV4() {

   * Returns the {@link AnnotatedType} of the parameter.
   *
   * @since 25.1 for guava-jre
   */
  @SuppressWarnings("Java7ApiChecker")
  public AnnotatedType getAnnotatedType() {
    return requireNonNull((AnnotatedType) annotatedType);
  }

  @Override
  public boolean equals(@CheckForNull Object obj) {
    if (obj instanceof Parameter) {
      Parameter that = (Parameter) obj;

# Request Parameters

Here's the reference information for the request parameters.

These are the special functions that you can put in *path operation function* parameters or dependency functions with `Annotated` to get data from the request.

It includes:

* `Query()`
* `Path()`
* `Body()`
* `Cookie()`
* `Header()`
* `Form()`
* `File()`

You can import them all directly from `fastapi`:

```python

    * Jeżeli nie jest, odbiorca zobaczy przydatną, przejrzystą wiadomość z błędem.
* Sprawdzi czy w ścieżce jest opcjonalny parametr zapytania `q` (np. `http://127.0.0.1:8000/items/foo?q=somequery`) dla żądania `GET`.
    * Jako że parametr `q` jest zadeklarowany jako `= None`, jest on opcjonalny.
    * Gdyby tego `None` nie było, parametr ten byłby wymagany (tak jak treść żądania w żądaniu `PUT`).

   * that conversion is safe.
   *
   * <p>This method is intended to help with usages of type parameters that have {@linkplain
   * ParametricNullness parametric nullness}. If a type parameter instead ranges over only non-null
   * types (or if the type is a non-variable type, like {@code String}), then code should almost

   * that conversion is safe.
   *
   * <p>This method is intended to help with usages of type parameters that have {@linkplain
   * ParametricNullness parametric nullness}. If a type parameter instead ranges over only non-null
   * types (or if the type is a non-variable type, like {@code String}), then code should almost

* Anche la documentazione alternativa dell'API mostrerà il nuovo parametro della query e il _body_:

![ReDoc](https://fastapi.tiangolo.com/img/index/index-06-redoc-02.png)

### Riepilogo

Ricapitolando, è sufficiente dichiarare **una sola volta** i tipi dei parametri, del body, ecc. come parametri di funzioni.

Questo con le annotazioni per i tipi standard di Python.

Importieren Sie zunächst `BackgroundTasks` und definieren Sie einen Parameter in Ihrer *Pfadoperation-Funktion* mit der Typdeklaration `BackgroundTasks`:

```Python hl_lines="1  13"
{!../../docs_src/background_tasks/tutorial001.py!}
```

**FastAPI** erstellt für Sie das Objekt vom Typ `BackgroundTasks` und übergibt es als diesen Parameter.

## Eine Taskfunktion erstellen

Let's say that you want to declare the query parameter `q` as a required `str`.

And you don't need to declare anything else for that parameter, so you don't really need to use `Query`.

But you still need to use `Path` for the `item_id` path parameter. And you don't want to use `Annotated` for some reason.

Python will complain if you put a value with a "default" before a value that doesn't have a "default".

# Query Parameter Models

If you have a group of **query parameters** that are related, you can create a **Pydantic model** to declare them.

This would allow you to **re-use the model** in **multiple places** and also to declare validations and metadata for all the parameters at once. 😎

/// note

This is supported since FastAPI version `0.115.0`. 🤓

///

## Query Parameters with a Pydantic Model